The circuit presented is from the Motorola Linear Databook of 1990. The integrated circuit is a transconductance operating and the power supply need not be symmetrical.
This circuit was found in an old manual of linear integrated circuits of the 80's. Equivalent...
Found in a 1980s American publication for amateur radio this circuit uses components from the era. The...
This TTL circuit for digital signals up to a few dozen megahertz was found in old documentation, but...