This very low power amplifier is designed by Amperex for hearing aids. It is based on TAA370 which is not an integrated circuit that can be found today.
This circuit can also use other series operational amplifiers such as MC33172, MC33174, MC35171,...
This circuit was found in the ON Semiconductor's Thyristor manual of the 1980s. The high quality...
The circuit shown in the figure uses general purpose NPN transistors and can be used to generate...