This circuit was found in a 1966 General Electric documentation. The circuit makes use of PUTs that are uncommon components today. Counting direction depends on the programming in A and B.
This circuit uses in operational amplifier to produce square and triangular low frequency signals....
Found in a 1968 American documentation, this circuit generates sawtooth signals whose rise and...
This VCA was found in the July 1988 issue of Radio Electronics magazine. It uses an OTA op amp and...