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Waveform Generators,
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Waveform Generator Circuits: #'s-C
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Last Updated on:
Saturday, April 14, 2012 06:45 AM |
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Circuits Designed by Dave Johnson, P.E. : |
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- MICROPOWER
PULSE GENERATOR
it is hard to design a pulse generator that produces clean logic pulses while
drawing very low current. This circuit is designed to produce short 2mS pulses at a
rate of one per second while drawing only 1 microamp from a 9 volt battery.
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ULTRA PURE 125KHz SINE WAVE
SIGNAL SOURCE
For some RFID systems operating at 125KHz, a very low distortion signal source
reference is needed. The circuit shown on this page produces a 10-volt
peak-to-peak signal into a 50-ohm load, with a distortion of only 0.01%.
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Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:
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Three phase sinusoidal waveform generator uses PLD - 12-Oct-06
Issue of EDN Five ICs substitute for electromechanical three-phase
source.... [Design Idea by Eduardo Perez-Lobato, University of Antofagasta,
Antofagasta, Chile; Edited by Brad Thompson and Fran Granville] |
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Transconductance amp gives oscillator reciprocal response -
17-Apr-03 Issue of EDN The circuit in Figure 1 is a variation on the
familiar integrator/comparator triangle-wave oscillator, which you typically
implement with two op amps. An integrator and a comparator connect in a
positive-feedback loop; the comparator drives the integrator and vice versa.
A fixed amount of hysteresis exists in the comparator, producing a triangle
wave at the integrator's output.... [Design Idea by Mike Irwin, Shawville,
PQ, Canada] |
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Triangle waves drive simple frequency doubler - 23-Nov-06 Issue of
EDN Extend a function generator's range, and get a sine wave signal in
the bargain.... [Design Idea by Jim McLucas, Longmont, CO; Edited by Brad
Thompson and Fran Granville] |
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Tri-Waveform Generator - The Tri-Waveform Generator can be used for a number
of different uses. The one that I use it for is a signal generator to test circuits.
The frequency range is 20 to 20khz. and can be adjusted by R1. The duty cycle or the
time that the waveform is.… [Designed by Randy Linscott] |
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Use a PC to Record Four Channel Waveforms - 05/25/00 EDN-Design Ideas This
design idea is a sequel to a previous one, "Use a printer port to record digital
waveforms," EDN, June 18, 1998, pg 136. Both ideas are similar: Use the PC's printer
port to sample waveforms, and use the PC's memory to store data. The technique
presented here expands the capability to four channels…. [Design Idea by Dean Chen,
Dycam Inc, Chatsworth, CA] |
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Variable Gain Control Produces Pure Sine Wave - 10/27/94 EDN-Design
Ideas....The circuit in Fig 1 delivers a pure, buffered, and level-controlled sine
wave. With no tuning requirements, the circuit works with all crystals up to about 30
MHz….. [Design Idea by Barry Harvey, Elantec Corp, Milpitas, CA] |
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Voltage Controled Oscillator - Unnijunctions are very interesting.
They love to be used in oscillators…. [Randy Linscott's website] |
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Voltage Controls Sine Wave Frequency - 08/17/95 EDN-Design Ideas....The
circuit in Fig 1 generates a 50-Hz to 1-kHz sinusoidal waveform that exhibits lower
than 60-dB THD. The input voltage controls the output frequency with the relationship
1 kHz/V. The output amplitude is invariant with frequency over the entire operating
range. IC1 is a V/F converter.... [Design Idea by Yongping Xia, EBT Inc, Torrance, CA] |
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Waveform Generator Demodulates FM Signals - 10/10/96 EDN-Design Ideas....The
circuit in Figure 1 uses the phase-detector signals of a precision waveform-generator
IC to perform FM demodulation. In a standard application, the IC's phase-detector
input and output synchronize the chip's output frequency to that of an applied signal.
If the signal is FM, you can extract the demodulated signal from the phase-detector
output. The waveform generator.... [Design Idea by Doug Vargha, Maxim Integrated
Products, Sunnyvale, CA] |
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Waveform Generator provides Flexible Frequency tuning for Sensor Measurement
- 17-Dec-04 Issue of EDN Variable-resistance sensors convert a fixed dc
excitation voltage or current into a current or voltage that's a straightforward
function of the quantity undergoing measurement. In another class of sensors, moving
objects or fluids produce a sensor signal by altering an LC circuit's inductance or
capacitance.... [Design Idea by Colm Slattery, Analog Devices, Limerick, Ireland] |
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Wien Bridge Oscillator is Reborn - 06/13/02 EDN-Design Ideas....In1940,
William Hewlett and David Packard launched a product from a garage. product was a Wien-bridge
oscillator. It consisted of a single-pole highpass filter in series with a single-pole
lowpass filter.... [Design Idea by Michael Fisch, Agere Systems, Longmont, CO]
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Wien Bridge Oscillator keeps THD BeLow One PPM - 11/10/94 EDN-Design
Ideas....The Wien-bridge sine-wave oscillator uses a light bulb to stabilize its
amplitude. The circuit doesn't have a light bulb; it sports several enhancements that
lower its distortion.... [Design Idea by Jeff Smith, Analog Devices, Wilmington, MA] |
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Waveform Generator Circuits: #'s-C
D-F G-H
I-O P
R-S T-Z |
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