Found in an American publication from 1969, this circuit can be adapted to be used as a shield. Operational amplifiers can be of modern equivalent types.
Found in Philips' 1967 documentation, this circuit makes use of period components. The SCR can be...
The circuit presented, from the Analog Devices linear integrated circuits manual, has compensation for...
This circuit uses a 741 operational amplifier that must be powered by a symmetrical source of 6 to...