This circuit was obtained in documentation on medical applications from 1966. The circuit is used in electromyography by switching the electrodes used with the equipment.
This circuit was obtained from an English publication from the 70's. The circuit is still current for...
This circuit makes use of an unusual Analog Devices component today. The circuit is from a 90's...
This circuit was found in a 1974 documentation. The bipolar transistor can be the BC548 and at the...