This circuit was found in a National Semiconductor manual from the 1980s. The integrated circuits used are equivalent. Note the need for a symmetrical power supply.
This circuit was found in a Radio Electronics from October 1952. The circuit equalizes the sounds...
This circuit can function as a circuit breaker or current switch opening with a current according to...
The supply of this circuit can be done with voltages from 8 to 28 V and the maximum output current is...