This amplifier is from Motorola documentation from the 70s. The circuit uses transistors from the time, which are not common today, such as the SE7005 or 2N3916 at the output.
This circuit for loads up to 10 A was found in a 2005 Linear Technology documentation. The MOSFET...
In this circuit of a 1956 publication, the handset must be high-impedance magnetic and L1 has 200...
This circuit can be used to obtain a zener voltage from a common zener of another value, adjusting...