This VCA was found in the July 1988 issue of Radio Electronics magazine. It uses an OTA op amp and has its gain adjusted by the voltage at the gain input.
Found in 1980s Electronics Design, this circuit covers 4 decades of frequencies with a unique...
This circuit allows the use of two triggers (inverters or NAND gates connected in this way) to...
Found in 1970s General Electric documentation, this circuit uses period components to control a 12 V...