Sinusoidal Oscillator (CB8427E)

Found in a 90s Electronic Design, this circuit can generate sinusoidal signals from 0.1 Hz to 25 kHz with low distortion using a MA292 from Maxim.

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Symmetrical Adjustable Source (CB16785E)
This symmetrical 1.2 to 35 V source was found in a 1994 documentation. The integrated circuits are...
4-channel mixer (CB8756E)
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1 to 5 W amplifier TDA1011 (CB15975E)
This amplifier is specifically designed for portable radio and recorders with a 4 ohms load....