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Oscillators:  Sine Wave
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Oscillator Circuits -- Main Page

 

Last Updated: October 24, 2017 02:55 PM

Circuits Designed by Dave Johnson, P.E. :
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%. . . Circuit by Dave Johnson P.E.-February, 2002

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The Wien-bridge oscillator is reborn -  06/13/02  EDN-Design Ideas - 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 filter in series with a single-pole lowpass filter.  To keep the gain cons __ Circuit Design by Michael Fisch, Agere Systems, Longmont, CO

Three phase sinusoidal waveform generator uses PLD -  10/12/06  EDN-Design Ideas - Five ICs substitute for electromechanical three-phase source __ Circuit Design by Eduardo Perez-Lobato, University of Antofagasta, Antofagasta, Chile

Twin-T Audio Sine Wave Oscillator -  This circuit produces a clean sine wave signal ideal for audio testing, or wherever a good-quality sine voltage source is required.  It uses only one integrated circuit which is a common dual operational amplifier, the Texas Instruments TL072CP.  The values shown provide an output frequency of about 1000 Hertz.  This frequency may be varied over a wide range, using the formula shown in the schematic.  For most audio frequencies, the oscillation rate is almost exclusively determined by __ Designed by Arthur Harrison

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 __ Designed by Andrew R. Morris

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%. . . Circuit by Dave Johnson P.E.-February, 2002

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.    __ Circuit Design by Barry Harvey, Elantec Corp, Milpitas, CA

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 __ Circuit Design by Yongping Xia, EBT Inc, Torrance, CA

Wien Bridge Oscillator -  The OpAmp Wien-bridge oscillator provides a nice view into classic oscillator design using feedback analysis.  Feedback analysis reveals if your circuit is stable (well behaved) or unstable (spice design)  __ Designed by Andrew R. Morris

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 __ Circuit Design by Jeff Smith, Analog Devices, Wilmington, MA

Wien Bridge Oscillator Rail-to-Rail Sine Wave Generator  -  Circuit Ideas for Designers App Note__ Advanced Linear Devices, Inc

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.   __ Designed by Ramon Vargas 20-8-04

Wien-bridge oscillator is reborn -  06/13/02  EDN-Design Ideas - 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 filter in series with a single-pole lowpass filter.  To keep the gain cons __ Circuit Design by Michael Fisch, Agere Systems, Longmont, CO

Wien-bridge Theremin -  This circuit is a basic Theremin with only a pitch control.  It uses the "heterodyne" technique, as did Theremin's original instrument.  Heterodyning is advantageous in its simplicity, and is made further attractive in this design by eliminating the coils that are usually hard to find (electronic design 10/05)  __ Designed by Arthur Harrison


Oscillators:  Sine Wave#'s - N        O - S        T - Z

 


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