This circuit of the 70's uses transistors of the time. The circuit can amplify signals from 10 Hz to 100 kHz and modern equivalent components can be used. The circuit is from Ferranti.
This is one of the channels of an amplifier suggested by Westinghouse in 1970s documentation. The circuit...
This circuit shuts off and locks the power to a load in the event of a failure. The circuit is from...
August 2017 - STMicroelectronics' BlueCoin development environment is available at Mouser...