This stereo circuit is from Japanese 1960 documentation. The circuit was originally designed to work with a tube amplifier, removing power from it. The transistors are germanium.
This configuration, which does not have a very high Q, uses a 741 operational amplifier, but other...
Pulses in sequence 1 to 10 are produced by this circuit. The pulses can be used to drive output...
This sophisticated digital timer was found in a 2002 documentation. Since CMOS integrated circuits are...