This shield circuit, from a documentation from the 70s, employs an optocoupler with two SCRs to control a small load of 1.5 W.
We found this circuit in the National Semiconductor Audio Handbook of 1977. The circuit produces...
Found in American documentation from 1968 this circuit is based on discrete components in addition...
This circuit used in instrumentation is suggested by National Semiconductor, now Texas Instruments and...