Constant Volume Amplifier (CB26275E)

This circuit is from a 1990s publication by William Sheets. The circuit consists of a stage whose gain is adjusted according to the signal intensity.

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Precision instrumentation amplifier (CB9843E)
Found in documentation from the 90s, this circuit is based on operational amplifiers of the time....
Signal generator CIR15041S (CB7922E)
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PNP and NPN Oscillator (MSB120E)
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