This high impedance headphone amplifier was found in American documentation from the 1990s. Any general-purpose FET can be used.
This is a traditional configuration of a transistor amplifier with complementary transistors that can be...
The purpose of this circuit is to obtain a voltage of 15 V with 1.5 A from a 48 V input. The...
This circuit, which can be used as a shield, was found in old documentation. The circuit must be...