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 has a 2 V full scale using a 4-and-a-half-digit A / D converter. The circuit is...
This very low power circuit is based on the ICL7860. We found it in an Electronics Now from April...
This circuit was obtained from an American documentation from the 90's. The transistor can be a...