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 be used with receivers to attenuate signals that may cause interference. The...
This circuit was adapted from an Italian publication that no longer exists. This is “Onda Quadra”...
This ultra-low power metronome was found in a 1991 documentation. The output transistor is general...