This 2-quadrant modulator circuit was found in the May 1988 issue of Radio Electronics magazine. The CA3080 is an OTA operational amplifier.
We found this audio preamplifier circuit with a 741 operational in a 1976 publication. However,...
This circuit operates at a frequency of 80 KHz and modulation up to 60 kHz. The circuit is from...
Found in Linear Technology documentation from the 1980s, this generator uses integrated circuits...