Wien Bridge Oscillator (CB9197E)

Found in an EDN from the 90s, this circuit has a distortion of only 0.003%. Capacitors and double potentiometer determine the frequency.

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Extended range power control (CB7935E)
This circuit was found in a General Electric documentation from 1965. The circuit is full wave for...
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In the presented circuit it is possible to vary the frequency of the rectangular signal produced. This...