Found in American documentation from 1969, this circuit switches signals with a FET of the time. The circuit can be implemented with modern equivalent transistors.
IDT ZSSC3230 Capacitive Sensor Signal Conditioner Available from Mouser Electronics stock, this IDT...
This circuit uses only two common transistors and provides good audio power in a speaker. Readers who...
This is the analog part of the previous circuit with the pressure sensor for the altimeter. The...