We found this micro amplifier in a technical documentation from National Semiconductor. The circuit can be used on an experimental phone, being powered even by alternative power sources.
This circuit is from a Radio Electronics from October 1963. The transistor is a power transistor of the...
We found this circuit in an English publication from the 80's. The circuit is perfectly current,...
This circuit is from the 1977 RCA CMOS Integrated Circuit from the RCA of 1977. The power supply of...