This 2-quadrant modulator circuit was found in the May 1988 issue of Radio Electronics magazine. The CA3080 is an OTA operational amplifier.
This circuit with the known PLL 567 can be found in other versions in this section and in this...
We find this circuit in the 80s used integrated circuit manual itself. The integrated circuit is not...
This lock-up alarm circuit was found in a 1990s Radio Electronics magazine. The sensors are...