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Miscellaneous oscillator circuit diagrams

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Low Frequency Sinewave Generators
Low Frequency Sinewave Generators
December 28, 2010

The two circuits illustrate generating low frequency sinewaves by shifting the phase of the signal through an RC network so that oscillation occurs where the total phase shift is 360 degrees. The transistor circuit on... [more]

Triangle and Squarewave Generator
Triangle and Squarewave Generator
December 27, 2010

Here is a simple triangle/squarewave generator using a common 1458 dual op-amp that can be used from very low frequencies to about 10 Khz. The time interval for one half cycle is about R*C and... [more]

Oscilloscope testing module (huntron circuit)
Oscilloscope testing module (huntron circuit)
December 10, 2010

Oscilloscope testing module (huntron circuit) [more]

Function Generator
Function Generator
December 3, 2010

Built around a single 8038 waveform generator IC, this circuit produces sine, square or triangle waves from 20Hz to 200kHz in four switched ranges. [more]

Reverse Bias Oscillator
Reverse Bias Oscillator
November 25, 2010

There are a number of npn transistors that will oscillate in the audio range when reverse biased. Minimum supply voltage is 7V for low power transistors such as BC109, BC238 and 2N2222A, it becomes 12V... [more]

1KHz Sinewave Generator
1KHz Sinewave Generator
November 25, 2010

This circuit generates a good 1KHz sinewave using the inverted Wien bridge configuration. [more]

Triangle / Squarewave Generator
Triangle / Squarewave Generator
October 12, 2010

Here is a simple triangle/squarewave generator using a common 1458 dual op-amp that can be used from very low frequencies to about 10 Khz. The time interval for one half cycle is about R*C and... [more]

Simple White Noise Generator
Simple White Noise Generator
September 30, 2010

This two-transistor white noise generator has a surprising feature – about 30dB more noise than the more traditional designs. Q1 and Q2 can be any small-signal transistors with a beta of up to 400. The... [more]


circuit from:http://www.extremecircuits.net/2010/04/simple-white-noise-generator.html

Switchable Output Crystal Oscillator
Switchable Output Crystal Oscillator
September 30, 2010

This oscillator circuit permits crystals to be electronically switched by logic commands. The circuit is best understood by initially ignoring all crystals. Furthermore, assume that all diodes are shorts and their associated 1kO resistors open.... [more]


circuit from:http://www.extremecircuits.net/2010/05/switchable-output-crystal-oscillator.html

Minimalist Oscilloscope
Minimalist Oscilloscope
September 26, 2010

If you are the proud owner of an old oscilloscope tube, you may be interested in using it once more for its original purpose. All you need are the right voltages on the right pins:... [more]


circuit from:http://www.extremecircuits.net/2010/05/minimalist-oscilloscope.html



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