Frequency to voltage converter (CB6993E)

Found in Popular Electronics from the 90s, this circuit can be used in tachometers. The integrated circuit is not a common component today.

| Clique na imagem para ampliar |

Crystal AM transmitter (CB20584E)
This short-range transmitter has the frequency determined by the crystal. The frequency can be...
Current-Controlled Oscillator (CCO) (CIR116E)
The circuit shown here is a CCO. The frequency here depends on the current through the...
True RMS detector (CB9691E)
Found in a documentation from the 90s, this circuit has a typical accuracy of 2% with 20 V signals at...