This space mark demodulator for FSK signals was found in an American telecommunication documentation from the 1980s. The circuit operates with 2025 Hz and 225 Hz mark space signals.
This stage was found in a 1964 Electronic Design. The transistors are of the time and the shape of...
This circuit is from an 80's American documentation. The circuit uses components of the time which...
This circuit can reduce the voltage of a source by providing regulated adjustable output. The...