This circuit was found in a Japanese publication from the 1960s. It uses germanium transistors and is powered by a voltage of 22.5 V. The circuit includes the erasure oscillator.
This solid-state relay (SSR) or shield was found in a 1995 Electronics Now. The transistor can be...
The output current of this circuit reaches 12 mA. The zener diode determines the output voltage. The...
In the figure we have an IF amplifier step using a MOSFET. The circuit was found in a 1980s...