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.
The circuit is of the Motorola Linear Databook of 1990. The power source must be symmetrical and the...
This 6 V battery charger was found on a 1987 Hands On Electronics. Rc determines the charging...
This circuit is recommended by Texas Instruments in the datasheet of the TL317, equivalent to...