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 is from an April 1988 Radio Electronics magazine. The circuit is retriggerable and...
MEMS Oscillators Provide Semiconductor-Grade Reliability and Superb Frequency Stability Over a...
This circuit utilizes a precision operational amplifier that can be replaced with an equivalent. The...