Phase Detector 7400 (CB22427E)

This circuit detects the phase of a signal. As it is a TTL circuit, it must be powered by a voltage of 5 V.

Analog switch (CB21253E)
This circuit was found in an Electronic Design from the 90s. Operational amplifiers admit modern...
Power Zener (CB216E)
Using in operational amplifier is possible to increase the dissipation power of a zener. This...
Power Grid C with Optocoupler (CB16025E)
With an optodiac we have the circuit of the figure, suggested by MotoroIa, in which we do the...