This circuit was obtained in a 90s Popular Electronics. It is used for tuning on AM radios. The field effect transistors used support equivalents.
This circuit serves to isolate analog signals, for example, audio signals in a secure link...
This circuit uses a 7812 and another regulator integrated circuit that is not very common...
This is the normal configuration of the LM12 as a high voltage amplifier. The LM12 consists of a...