Monday, March 30, 2009

Electronics and Communication Projects (ECE)- VII

Double Data Rate Power Supply using the Tl5002 Voltage Tracking Regulator: The TL5002EVM-180 synchronous buck converter provides a 12A reference design for evaluating the performance of the TL5002 PWM control IC and the TPS2837 MOSFET driver for Double Data Rate (DDR) memory applications. (added 3/05)

Dual High-Current Power Supply Kit: The National Semiconductor Power Supply Kit is designed around the National LM2636, a synchronous buck regulator. It provides over 28 amps of current with variable output voltages ranging from +1.3V to +3.3V. (added 3/05)

Dual Monolithic Buck Regulator Provides Two 1.4A Outputs with 2-Phase Switching to Reduce EMI: DN305 - Design Notes (Linear Technology) (app note added 1/06)

EP48 12 V 1.44 W Non-Isolated Buck Converter: This design kit is a non-isolated 12 V, 120 mA power supply utilizing a LNK304. This power supply is intended as a general purpose evaluation platform for LinkSwitch-TN in a buck converter configuration. (added 7/06)

Extend the input range of a Low dropout regulator: 10/17/02 EDN Design Ideas / (added 1/05) Because of process limitations, all ICs have an input-voltage limitation. This limitation can be cumbersome when you try to step down a high supply voltage to a lower, regulated voltage using a dc/dc converter, such as a linear regulator. Adding a FET to the input of a linear regulator creates a dc/dc converter with a wider input-voltage range than the range of the regulator alone....

Flyback LDO Buck Sync. Buck Reference Design: Flyback, LDO, Buck and Sync Buck with Vin 10 to 16 V. Multiple output voltages of -24 V, -5 V, 1.5 V, 3.3 V, 5 V, 12 V and 58 V. The total output power is 15 W. (added 3/05)

Get Buck boost Performance from a Boost regulator: 07/11/02 EDN Design Ideas / (added 1/05) The SEPIC (single-ended, primary-inductance-converter) topology is generally a good choice for voltage regulators that must produce an on output voltage that falls in the middle of the input-voltage range, such as a 5V output from a 2.7 to 6V input, The topology has some disadvantages, however. The efficiency of a SEPIC circuit fares worse than that of buck and boost regulators, and SEPIC desig......

High Current Step-Down Controller Regulates to 0.6V Output from 3V Input: DN322 - Design Notes (Linear Technology) (app note added 1/06)

High Efficiency Monolithic Buck Converter [LTC1265]: DN105 - Design Notes (Linear Technology) (app note added 6/06)

High Power Synchronous Buck Converter Delivers Up to 50A: DN156 - Design Notes (Linear Technology) (app note added 1/06)

High Voltage Buck Regualtors provide High Current Low Profile Power Solutions for FireWire Peripherals: DN287 - Design Notes (Linear Technology) (app note added 6/06)

High Voltage Current Mode Step-Down Converter with Low Power Standby Capability: DN383 - Design Notes (Linear Technology) (app note added 6/06)

High Voltage Low Noise Buck Switching Regulator [LT1777]: DN212 - Design Notes (Linear Technology) (app note added 1/06)

Hot Swap Push-Pull Sync. Buck Negative Flyback Dual Sync. Buck Reference Design: Hot Swap, Push Pull, Sync. Buck, Negative Flyback, Dual Sync. Buck with Vin of -36 V to -72V. Vout of 8 V, 5 V, 3.3 V, 2.5 V and -5 V. The output power is 79.5 W. (added 3/05)

IRDCiP1202-A 300kHz Dual 15A 5.5VIN to 13.2VIN Dual Output Synchronous Buck Converter using iP1202: This board allows engineers to easily evaluate the iP1202 in an independent and parallel configuration that is capable of providing up to 15A per phase with double-sided heat sinking. (added 6/06)

IRDCiP2001-A 500kHz 40A 2-phase Synchronous Buck Converter using iP2001: This board enables engineers to easily evaluate the iP2001 in a 2-phase configuration that is capable of providing up to 40A in a lab environment without airflow. (added 6/06)

Isolated Converters Have Buck Simplicity and Performance: DN377 - Design Notes (Linear Technology) (app note added 1/06)

LDO Buck/Boost 2 Sync Buck Sync Boost Reference Design: LDO, Buck/Boost, 2 Sync. Buck, Sync. Boost with Vin 2.7-4.2 V LiION or 4.5-6.5 V adapter. Multiple output voltages of 1.5 V, 2.5 V, 3.3 V and 8 V. The total output power is 5.5 W. (added 3/05)

LED Buck PFM: Powers LED with Constant Current Starting at 100MV over VF: This is a proof of concept circuit which needs improvement. The part values shown will run a high efficiency red LED with a Vf of 1.9V from only 2 nicads, right down to 2 volts. For a white LED you will need more batteries and you must increase the 1.0K resistor to a higher value. Current sensing at a mere 18mV over 1ohm makes this stepdown switcher efficient, but efficiency can be increased by using a larger inductor, improving transistor switching speed, or by increasing the value of the 1.0K resistor. ... (added 2/05)

LED Headlamps : This article includes circuits of DC-DC LED drivers step downs to run LEDs on less than Battery Volts, Boost for above. (added 4/02)

LM2675 5.0EVAL 1 Amp Step Down High Efficiency Simple Switcher Evaluation Board: National Semiconductor Application Note 10 Feb1999 (app note added 7/02)

Low EMI Synchronous DC/DC Step-Down Controllers Offer Programmable Output Tracking: DN382 - Design Notes (Linear Technology) (app note added 1/06)

Lower DC/DC Converter Ripple by using Optimum Capacitor Hookup: 10/31/02 EDN Design Ideas / (added 3/05) Low-ripple-voltage positive-to-negative dc/dc converters find use in many of today's high- frequency and noise-sensitive disk drives, battery-powered devices, portable computers, and automotive applications. Like a positive buck converter, a positive-to-negative converter can have low output-ripple voltage if you place the bulk input capacitor between VIN and VOUT rather than between VIN and gr......

LT1074/LT1076 Design Manual: AN44 - Linear Technology - This note discusses the use of the LT1074 and LT1076 high efficiency switching regulators. These regulators are specifically designed for ease of use. This application note is intended to eliminate the most common errors that customers make when using switching regulators as well as offering insight into the inner workings of switching designs. There is an entirely new treatment of inductor design based upon simple mathematical formulas that yield direct results. There are extensive tutorial sections devoted to the care and feeding of the Positive Step- Down (Buck) Converter, the Tapped Inductor Buck Converter, the Positive-to-Negative Converter and the Negative Boost Converter. Additionally, many troubleshooting hints are included as well as oscilloscope techniques, soft-start architectures, and micropower shutdown and EMI suppression methods.

LT1777 High Voltage Low Noise Buck Switching Regulator: DN212 - Design Notes (Linear Technology) (app note added 1/06)

Monolithic Step-Down Regulator Withstands the Rigors of Automotive Environments and Consumes Only 100µA of Quiescent Current: DN378 - Design Notes (Linear Technology) (app note added 6/06)

Monolithic Synchronous Step-Down Regulators Pack 600mA Current Rating in a ThinSOT Package: DN300 - Design Notes (Linear Technology) (app note added 6/06)

No Design Switching Regulator 5V 5A Buck (Step Down) Regulator: DN48 - Design Notes (Linear Technology) (app note added 1/06)

Notebook Power Supply has Two Outputs: 03/03/94 EDN-Design Ideas / (added 3/06) The notebook-computer supply in Fig 1 powers the 5V logic and derives an adjustable -24V supply for an LCD's backplane. The design uses only a high-efficiency buck regulator (Si9150) and an NMOS/PMOS, dual-power-FET chip set (Si9943), eliminating the extra parts required when you implement both supplies independently. Because of the low on-resistances of the dual FETs, this circuit can achieve better than 92% efficiency at 7.2V input and full-load output (7.6W)....

Obtain higher Voltage from a Buck regulator: 05/29/03 EDN Design Ideas / (added 1/05) Several semiconductor vendors'current-mode buck controllers have input-voltage ranges of 30 to 36V but have output-voltage ranges from the reference voltage to approximately 6V. This output-voltage constraint arises from the common-mode-voltage limitation of the current-sense amplifier. In real-world applications, the power-supply designer must be able to generate high output voltage for printe......

Off Line Buck Regulator Cuts Costs Leadtime: 10/26/95 EDN-Design Ideas / (added 3/03)

Positive regulator makes negative DC/DC converter: 12/26/02 EDN Design Ideas / (added 1/05) Power-supply designers can choose from a plethora of available positive buck regulators that can also serve as negative boost dc/dc converters. Some buck regulators have a negative-feedback reference voltage expressly for this purpose, but ICs that have positive-reference feedback voltages far outnumber these negative-feedback regulators....

Power Management in Portable Applications: Understanding the Buck Switchmode Power Converter: Microchip Application Note - Published 18-Jul-01 (app note added 2/06)

Interface Cable for Casio Qv-200 Digital Camera: (electronic circuit added 4/05)

Kodak DC 20 Camera Interface (PIC12C509): (circuit / schematic design added 6/06)

Lightning Activated Camera Shutter Trigger: This circuit is used to trigger a camera's electronic shutter circuit when a flash of lightning is present. This circuit would also work for photographing fireworks displays or other events involving flashes of light. (added 10/05)

Adjustable Strobe Light: 120-Volt mains power source, up to20 Hz flash rate (added 4/02)

Flash Slave Trigger: Flash slaves are used when you need to supplement1-flash unit with1-or several more. This slave trigger simply triggers those other units. It does this by "seeing" the first flash (using a phototransistor) and triggering the other flashes a few microseconds later. The sensitivity of the circuit is adjustable to compensate for ambient light or dimmer than usual master flashes. (added 5/02)

LX1995 LED Driver: Camera Flash Application (AN-30): Application Note 30 from Microsem (app note added 6/06)

Miniature Strobe Light: (electronic Circuit / Schematic added 10/04)

Mini Pocket Strobe Circuit: works from two1.5-Volt AA batteries, based on modified camera flash unit (added 6/03)

Audio Acquires the Write touch: 02/20/03 EDN-Design Ideas / (added 11/05)

Capacitance Meter #1: (Circuit added 9/04)

Capacitance Meter #2: (added 8/03)

AN-829: Environmental Compensation on the AD7142: The Effects of Temperature and Humidity on Capacitance Sensors: AN-829 - Analog Devices Application Notes (Circuit / schematic design added 6/06)

Dual Comparators Stabilize Proximity Detector: 02/16/98 EDN-Design Ideas / (Electronic Circuit diagram added 03/03)

Measure open circuited cables using a multimeter: 09/26/02 EDN Design Ideas / (added 1/05) You can use a multimeter with capacitance-measurement capability to measure the length of wire or cable to an open circuit. The capacitance of a pair of wires (or a wire to a shield) is directly proportional to the length of the wire. If you know the capacitance per foot of wire, then you can calculate how far it is to the open circuit....

Touch Activated Alarm: (added 10/02)

Using the AD7142 and a Capacitive Sensor to Develop a Single-Push Digital Shutter Button: AN-833 - Analog Devices Application Notes (added 2/06)

Fastest Finger First Indicator: (electronic Circuit / Schematic added 10/04)

Touch Activated Alarm (uoguelph_: (schematic / circuit added 10/02)

Touch Activated Lamp (ourworld): (circuit / schematic design added 6/06)

Touch Dimmer: (electronic Circuit / Schematic added 10/04)

Touch Switch Needs No DC Return Path: 02/03/05 EDN Design Ideas / (added 5/05) Common designs for touch switches detect a decrease in resistance when a user's fingertip either connects a contact to the circuit's common ground or supplies an injection of 60-Hz ac voltage, resulting from immersion in the electrostatic field that nearby power lines radiate. But what if no nearby power lines exist and the equipment operates from a battery source, such as in an automotive appl...

Ultracapacitor powers bicycle light: 09/28/00 EDN Design Ideas / (added 2/06)

Solar Cells implement Low Cost Illuminator: 09/12/97 EDN-Design Ideas / (Electronic Circuit diagram added 03/03)

Memory termination IC balances charges on series capacitors: 08/18/05 EDN Design Ideas / (added 11/05) Get the best performance from high-value capacitors with simple IC circuit.

Mains Remote Alert: Remotely-operates a Beeper and/or a LED via mains supply line Simple Circuitry, easy to build unit (Circuit added 9/04)

Single NiCd Cell Drives OpAmp: 12/05/96 EDN-Design Ideas / (added 2/06)

Wireless Microphone #4: (Electronic circuit added 4/05)

Miniature MW Transmitter: circuit diagram of simple medium wave transmitter using BF494B. This simple transmitter have a range of 200 meters. . (Circuit added 9/04)

Miniature FM Transmitter #1: (Electronic Schematic / circuit added 4/02)

Miniature FM Transmitter #2: (Electronic Schematic / circuit added 4/02)

Miniature FM Transmitter #3: (Electronic Schematic / circuit added 4/02)

Selecting Inductors for Buck Converters: National Semiconductor - Application Note (app note added 7/06)

'Shoot-through' in Synchronous Buck Converters / AN-6003: Fairchild Application Notes / (app note added 6/06)

Simple Sychronous Buck Regulator: MCP1612: Microchip Application Note - Published 14-Jan-05 (app note added 2/06)

Solar Step Down Regulator: (Circuit / schematic design added 6/06)

ST1S03 buck converters for hdd power supplies: AN2093 2. INTRODUCTION Purpose of This AppNote is to provide a brief summary of the specifications and the functionality of the application board.... (app note added 7/06)

Stepdown converter uses a ceramic output capacitor: 06/07/01EDN-Design Ideas / (added 7/03)

Sychronous Buck Regulator: MCP1612: Microchip Application Note - Published 14-Jan-05 (app note added 2/06)

Sync. Buck with Integrated FET Forward Dual Sync. Buck Reference Design: Sync. Buck with Integrated FET, Forward, Dual Sync. Buck with Vin of 48. Vout of 15 V, 3.3 V, 1.8 V, 1.5 V. The output power is 47 W. (added 6/06)

Synchronous Buck circuit produces negative Voltage: 02/06/03 EDN Design Ideas / (added 1/05) Many electronic systems require both positive and negative voltages to operate properly. Generating an efficient, low-voltage positive output from a higher voltage input typically entails the use of a synchronous buck regulator. But when generating a negative output voltage from a positive input voltage, you'd typically use a flyback topology, especially at higher output currents....

Synchronous buck MOSFET loss calculations with Excel model / AN-6005: Fairchild Application Notes / (app note added 6/06)

Synchronous Buck Reference Design #2: This reference design is synchronous buck-boost converter that can deliver up to 3.8 A of continuous current at -5 V from a 5 V input. This topology uses a synchronous buck controller (TPS5103) referenced to the negative output rail. The synchronous MOSFETs allow this design to achieve a peak efficiency of 88%. In addition, the TPS5103 provides a soft-start function and over-current protection. (added 3/05)

Synchronous Buck Reference Design: This reference design is a 5Vdc input to 1.65V @ 1A output synchronous buck converter. The controller is the TPS40003 operating at 600KHz. The controller features Predictive Gate Drive, which minimizes the bottom FET body diode conduction time. This provides the benefit of increased efficiency when compared to a standard gate drive method. Very low output ripple voltage and excellent transient load performance are achieved with this design. (added 3/05)

Synchronous Flyback Circuit Provides High Efficiency Conversion: 07/22/04 EDN Design Ideas / (added 1/05) Buck regulators are usually the first choice when you design nonisolated step-down regulators unless the ratio of VIN to VOUT is greater than 10, the input voltage is high, or both. Low duty cycle can be problematic for FET drivers and cause current-mode control loops to lose control. Efficiency can fall dramatically to 60 to 70% at low VOUT and current of only a few amps.

ThinSOT Micropower Buck Regulator has Low Output Ripple: DN373 - Design Notes (Linear Technology) (app note added 6/06)

Three parts provide tenfold increase in Switcher Current: 08/22/02 EDN Design Ideas / (added 1/05) Industrial-control circuits often derive their power from widely varying sources that can exceed the 40V maximum rating of popular switching ICs. This Design Idea presents a simple, flexible, and inexpensive buck switcher that converts an input voltage as high as 60V to 5V at several amps. The circuit is unique in that it boosts current with almost no compromise in performance, size, or cost....

Tiny Buck Regulator Accepts Inputs from 3.6V to 25V and Eliminates Heat Sink: DN268 - Design Notes (Linear Technology) (app note added 6/06)

Tiny Step-Up/Step-Down Power Supply Delivers 3.3V at 1.3A in Battery-Powered Devices: DN271 - Design Notes (Linear Technology) (app note added 1/06)

Tiny Versatile Buck Regulators Operate from 3.6V to 36V Input: DN367 - Design Notes (Linear Technology) (app note added 6/06)

TSM108 Evaluatin Board 12V to 6V DC/DC Converter: The TSM108 is a step down controller that features constant voltage and constant current regulation.The Evaluation Board was designed to allow different converter configurations. Several options for power semiconductor footprints are available on the PCB in order to make it adaptable to a wide range of converter output power. In a first step, this application note will describe the typical application. Then the various options available on the Evaluation Board PCB will be explained. (app note added 6/06)

Two AA cells power step down regulator: 01/07/99 EDN-Design Ideas / (Schematic / circuit added 10/02) [Note: File contains multiple circuits - scroll to find this circuit] DC/DC conversion is particularly challenging when both the input and output voltages are low. Step-up ICs that operate with inputs lower than 1V are available, but step-down ICs that accept input voltages near 2V are not. Thus, providing efficient power for the low-voltage CPU in a handheld product can be a problem if the power source is a two-cell AA battery.....

Wide range regulator delivers 12V 3A output from 16 to 100V source: 06/23/05 EDN Design Ideas / (added 10/05) Buck regulator tackles high input voltages.

Wide-Input, High Voltage Buck Converter: National Semiconductor - Application Note (app note added 2/06)

Insect Repellant: (electronic design added 10/06)

Insect Repellant: (circuit / schematic added 2/03)

Mosquito Repellant: (added 9/02)

12C508 Smart Lock: base sends a data sequence ( password) which is recognized by key. key checks sequence and -if it recognizes it -sends to base anor data sequence, as an answer to password. At Time when base gets a correct answer (which means that key has been introduced), relay is put into action, and it can command a number of consumers. (added 4/02)

4 Digit Keypad: (circuit design added 8/03)

5 Zone Alarm Circuit: (design circuit added 8/02)

6A door lock motor driver for automotive: AN456AN456AN456AN456AN456 nal (OVV), put at low level enable of L9937, confirming hardware switch-off of motor ; in this condition an output of half bridge is in... (app note added 6/06)

Alarm Control keypad: (circuit design added 8/03)

Almost Ultrasonic Motion Sensor: (circuit design added 8/03)

Analog Video Router: Intersil Application Block Diagram (app note added 6/06)

Anti Theft Motorcycle Alarm: (electronic design added 9/02)

Anti-Bag-Snatching Alarm: (electronic Circuit / Schematic added 10/04)

Anti-Theft Alarm for Bikes: (electronic Circuit / Schematic added 10/04)

Anti-Theft Security for Car Audios: (electronic Circuit / Schematic added 10/04)

Automatic door opener with PIC12C508: This circuit can be used to operate an electric strike or an electromagnetic lock on a door. It is not door being opened/closed, but a small electromagnetic strike which unlocks door…. (added 4/05)

Basic RF Transmitter for PIR Sensors: (circuit design added 8/03)

Combination Lock: This circuit is very basic to build. To open a the lock which is connected to the K1 Load. you must press each momentary switch in the correct sequence. The sequence used in this circuit is S1,S2,S3,S4. If any of the other switches are pressed the circuit will reset and you will need to start over. Depending on how you wire the switches, you can use any4 switch combination (added 2/03)

Combination Lock (PIC16F84): (circuit design added 8/03)

Cut Phone Line Detector #1: Can be used to alarm security system (added 4/02)

Digital Combination Lock: (electronic design added 9/02)

Digital Electronic Lock: (electronic (schematic / circuit added 11/05)

Door/Window Sensor Resists Tampering: 01/21/99 EDN-Design Ideas / (added 11/05) The simple, inexpensive circuit in Figure 1 detects a failure (or deliberate tampering) on lines connected to normally closed switch sensors. For example, common door interlocks and door/window sensors consist of normally open or normally closed magnetic reed switches. Depending on the monitoring configuration, an open or short on a line may go undetected, thus preventing alarm activation. Embedding a resistor in a normally closed sensor and using bipolar dc power supplies produces the balanced configuration in Figure 1. A short or open on a line (or sensor activation) produces a net positive or negative voltage at the input of the Q1-Q2 pair....

C

AN34 ZXSC100 Power Supply for Digital Still Camera: Zetec Semiconductors Applications Notes Presented in this applications note is a typical sytem power supply design for a digital still camera. The solution is based on ZXSC100 DC-DC boost converter which provides an efficient and cost effective design. Conversion is from a two cell alkaline battery, 3V to 2V, to a regulated 3.3V output with a maximum load current of 100mA. All performance graphs associated with this design are provided in application note. (app note added 2/06)

Automatic -Exposure Scheme uses Ccd Shutter : 07/02/98 EDN-Design Ideas / (added 11/05) This application follows Design Idea, "Peak detector maximizes CCD-sensor range" (EDN, Aug 15, 1996). Its aim was to optimize performance of an A/D converter used to digitize a linear CCD sensor's analog output. The method involved stretching upper reference of flash ADC....

Camera Power and Video Use Same Coax Cable : 09/25/97 EDN-Design Ideas / (added 2/06)

Casio QV-200 Digital Camera Cable. : Lose your cable? Build it yourself and save $29. Fits many QV models. (added 6/06)

Debugging an MCU-based CCD camera controller: Agilent Application Note (app note added 6/06)

Miniature FM Transmitter #4: (add 9/04)

Cellular Phone Helper #2: (Circuit / schematic design added 6/06)

AN-42036 / PCB Grounding System and FAN2001/FAN2011 High Performance DC-DC Converters: Fairchild Application Notes / (app note added 6/06)

5V Power Supply Teams Low Dropout Regulator Charge Pump: 01/08/04 EDN Design Ideas / (added 1/05) Auxiliary power of 3.3V is replacing 5V auxiliary power that "silver boxes" supply in most computer systems, but some circuits still require a 5V supply. Such systems impose messy task of creating a central 5V auxiliary....

AN-348: Avoiding Passive-Component Pitfalls: AN-348 Analog Devices Application Note (app note added 2/06) The Wrong Passive Component Can Derail Even Best Op Amp or Data Converter. Here Are Some Basic Traps to Watch For.

Avoiding Passive-Component Pitfalls: AN-348 Analog Devices Application Note (app note added 2/06) The Wrong Passive Component Can Derail Even Best Op Amp or Data Converter. Here Are Some Basic Traps to Watch For.

Build a Charge Pump with UltraLow Quiescent Current: 09/05/04 EDN Design Ideas / (added 1/05) Portable battery-powered devices often spend most of ir life in standby mode, in which quiescent current of an internal boost converter continuously bleeds battery. The quiescent current during standby can be larger than actual load current......

Charge Pump Doubles Negative Voltage: Maxim App Note #782 (app note added 7/03)

Compact Inductorless Boost Circuit Regulates White LED Bias Current: Maxim Application Note #1116 (app note added 7/03)

Controlling a Variable Voltage Power Supply using the DS1809 (Pushbutton Control): Maxim Application Note #1035 (app note added 7/03)

AN-79: IC PreAmplifier Challenges Choppers on Drift: National Semiconductor - Application Note (Circuit / schematic design added 6/06)

Chopper Amplifiers Complement a DC Accurate Low-Pass Filter: DN9 - Design Notes (Linear Technology) (Circuit / schematic design added 6/06)

Chopping Reduces Reference’s Supply Current: 04/10/97 EDN-Design Ideas / (Electronic Circuit diagram added 03/03)

Ultra Low Noise Op Amp Combines Chopper and Bipolar Op Amps: DN36 - Design Notes (Linear Technology) (added 2/06)

100 MHz Clock Solution for Desktop Computers: Pericom Semiconductor Application Brief # 021 (app note added 2/05)

68HC11 Stepper Motor Control: (circuit / schematic design added 6/06)

72 LED Clock: (electronic Circuit diagram added 03/03)

74ACT74 Makes Low-Skew Clock Divider: 12/17/98 EDN-Design Ideas / (added 11/05) Serial-data systems often generate an internal clock at twice data rate for mid-bit sampling or for generating bi-phase codes. External equipment and some internal processes require a clock that runs at data rate. Simply dividing twice-rate clock with a flip-flop generates a data-rate clock that is skewed by one logic delay with respect to input.....

AD9430 Evaluation Board Modifications for XTAL Oscillator Clocking: AN-616 Analog Devices Application Notes (app note added 6/06)

AN-291: Asynchronous Clock Interfacing with the AD7878: AN-291 Analog Devices Application Notes (app note added 6/06)

AN-616: AD9430 Evaluation Board Modifications for XTAL Oscillator Clocking: AN-616 Analog Devices Application Notes (app note added 6/06)

AN-657: ADN2812 Evaluation Board: AN-657 Analog Devices Application Notes (app note added 2/06)

AN-769: Generating Multiple Clock Outputs from the AD9540: AN-769 Analog Devices Application Notes (app note added 2/06)

Application of Zero-Delay Buffers in Switched Ethernet: Pericom Semiconductor Application Note # 015 (app note added 02/05)

Binary Coded Decimal (BCD) Clock (circuitdb): The clock circuit above uses seven ICs and 19 LEDs to indicate binary coded decimal time. The LEDs can be arranged (as shown in example above) so that each horizontal group of 3 or 4 LEDs represents.... (added 2/07)

Cheap 40kHz Clock: (electronic circuit added 7/03)

Chester's Propeller Clock: (design added 10/06)

Clock Recovery Scheme Suits Low Snr Systems: 06/05/00 EDN-Design Ideas / (added 6/06) A clock-recovery architecture can operate with NRZ digital signals, even at low SNRs. A clock-recovery subsystem is based on a PLL comprising a phase comparator, a loop filter, and a voltage-controlled oscillator (VCO)....

Clock Performance in Raid Storage Applications: PI6c2502: Pericom Semiconductor Application Note # 026 (app note added 02/05)

Clock Termination Techniques: Pericom Semiconductor Application Brief # 023 (app note added 02/05)

Crystal Considerations with Dallas Real-Time Clocks (RTCs): Maxim Application Note #58 (app note added 2/05)

Crosstalk on the Clock (Part 2): Maxim Application Notes / 1841 / Nov-04 (app note added 6/06)

ADN2819 Evaluation Board: AN-636 Analog Devices Application Notes (app note added 2/06) This application note describes use of ADN2819 evaluation board. The ADN2819 is a multirate clock recovery, data-retiming device based on a multiloop PLL architecture…..

Morse Code Practice Keyer #1: (added 10/02)

Morse Code Practice Keyer #2: (added 10/02)

30 Meter QRP Transmitter for Morse Code: (Circuit / schematic design added 6/06)

Morse Paddle Keyer: (Electronic circuit added 4/05)

Touch CPO: touch operated code practice oscillator using popular timer IC555. Practice Morse code in a different way. . (Circuit added 9/04)

Two Way Morse Practice Set: (added 2/05)

Color Organ #1: make different colored bulbs light at different frequencies of music, connects to speaker outputs (added 4/02)

Color Organ #2: one lamp color organ (added 4/02)

Color Organ #3: makes3 Light to blink and flash to music (added 7/03)

Colour (Sound) Organ: (electronic circuit added 4/05)

Simple Colour Organ: (electronic circuit added 4/05)

Wide Swing Variable Crystal Oscillator: (added 2/05)

4 Transistor Transmitter: (added 8/03)

Crystal Oscillators and Frequency Multipliers using the NE602 and NE5212: Philips Semiconductors Application Notes 1983, December 1991 (Electronic circuit design added 02/05)

LC (Colpitts) Oscillator operates on 0.5V to 5V Single Supply: Circuit Ideas for Designers - Application Notes - Advanced Linear Devices, Inc. (Circuit / schematic design added 6/06)

NanoPower LC (Colpitts) Oscillator Circuits: Circuit Ideas for Designers - Application Notes - Advanced Linear Devices, Inc. (Circuit / schematic design added 6/06)

Positive Feedback: The use of positive feedback is useful for producing oscillators. The condition for positive feedback is that a portion of the output is combined in phase with the input. For an amplifer with positive feedback the gain is given by the expression below. (Electronic circuit design added 02/05)

Trimless IF VCO part 2: Maxim Application Note 688, February 5, 2001 (Electronic circuit design added 02/05)

Resonant Frequency of a Colpitts Oscillator: (Electronic circuit design added 02/05)

Use of the CMOS Unbuffered Inverter in Oscillator Circuit: Texas Instrument Application ReportSZZA043 January 2004 (Electronic circuit design added 02/05)


No comments: