This old 1 W audio amplifier transistor circuit is from a 1967 Japanese magazine. The transistors are germanium of the time and the type transformers found in similar equipment of the time.
This circuit was found in a 1978 English magazine. It is a configuration that aims to select the...
This circuit was found in Maxim's documentation from the 90's. The circuit provides 12 V x 120 mA....
This circuit can be used as a shield. Its purpose is to detect the positive front of a signal...