This zero-crossing switch circuit was found in documentation from the 1990s. GE's PA424 is the main element of the circuit, uncommon today.
The presented circuit is based on an operational transconductance amplifier (OTA) having been...
This small 2-transistor amplifier was found in the Radio Electronics magazine of May 1959. The...
This TTL instructional circuit appeared in the February 1972 issue of Radio Electronics magazine. 5 V...