This Mullard circuit was found in a 1969 documentation. It uses complementary transistors on the output and does not need a transformer. The bandwidth goes from 100 to 20 000 Hz.
This circuit, from the 1977 GE semiconductor manual, uses a unijunction transistor beyond the...
This circuit, when connected to the 110 V power grid makes it possible to test capacitors with...
This circuit was found in a Texas Instruments handbook about operational amplifier. It has a very...