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Oscillators:
Sine Wave
Page 4
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Oscillator Circuits -- Main Page
Last Updated on:
Tuesday, April 17, 2012 08:17 AM |
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Circuits Designed by Dave Johnson, P.E. : |
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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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The Wien bridge oscillator is reborn - 13-Jun-02 Issue of EDN
In 1940, William Hewlett and David Packard launched a product from a garage.
The product was a Wien-bridge oscillator. It consisted of a single-pole
highpass... [Design Idea by Michael Fisch, Agere Systems, Longmont, CO] |
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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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Tuned Sine Wave Oscillators - National Semiconductor Application
Note (app note added 2/06) |
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Twin-T oscillator - This circuit produces an extremely low
distortion sine wave, in spite of the non-linear devices used for amplitude
limiting (D1 and D2). The reason is first that distortion (harmonics) is fed
to the minus input of the opamp with far less loss than to the plus input,
severely attenuating them. Second, this oscillator rides a
delicate....Designed by Andrew R. Morris (added 09/05) |
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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%.... [Designed by David A. Johnson] |
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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 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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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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Wien Bridge Oscillator Rail-to-Rail Sine Wave Generator - Circuit Ideas for
Designers Application Notes Advanced Linear Devices, Inc....[App Note] |
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Wien Bridge Theremin - (circuit / schematic added 2/03) |
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Wien-Bridge oscillator has simplified frequency control - In this article, a
modified version of the classical circuit that uses a single low-cost variable
resistor for frequency control will be described. (electronic design added 05/06/07)
[Design by Ramon Vargas 20-8-04] |
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Oscillators:
Sine Wave -
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Oscillator Circuits -- Main Page |
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