In this National Semiconductor circuit, the output voltage is numerically equal to the square root of the input voltage. The circuit is from the 90s and the components are from the period.
This peak indicator for stereo amplifiers uses a CA3130. The 80's circuit does not need a...
This circuit is from a 1967 US publication. The configuration can serve as a basis for designs...
Found in a Popular Electronics from the 90s, this circuit can act as a transmitter for an audio...