Found in a 1980s documentation, this amplifier uses an integrated circuit that is not easy to obtain now as it is of the era. The circuit is intended for FI ceramic filter circuits.
This oscillator takes advantage of the inductance of a high impedance magnetic earphone to...
The transducer used in this configuration that appears elsewhere on this site is a piezoelectric...
November 2016 - Mouser Electronics has in stock the Toshiba Bluetooth TC35670 and 35675...