100 mA Line Driver (CB20921E)

This low distortion circuit was found in 80's Analog Devices documentation. The used integrated circuits are not very common today.

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3-Transistor Radio (CB18847E)
This is a commercial radio circuit from the 1960s. The circuit was found in a Japanese publication from...
Instrumentation Amplifier with Differential Input (CB4929E)
The integrated circuit used in this 80's differential amplifier is a quadruple version of the 741...
Touch sensor PLL 567 (CB22466E)
This touch or proximity sensor circuit was found in a Popular Electronics from 1992. In the...