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 circuit was found in documentation from the 1980s. The control pulses are obtained by an...
This high current regulator for TTL circuits was found in an old French documentation from the...
This circuit is an alternative to the previous circuit. We found it in the same article in the...