For signals up to about 500 kHz modulated in amplitude and transmitted by the power network, the figure shows the receiver. The circuit is from a Radio Electronics from February 1989.
The previous circuit (CB5050E) triggers when the temperature exceeds the limit set on the...
Found in a 1960s Electronic Design, this circuit provides a signal from the sensing of an analog...
We found this sensitive high input impedance voltage amplifier in the November 1970 Radio...