This amplifier is from Motorola's 1990 Linear Databook. The circuit can be used with operating amplifiers with the same characteristics and the power supply must be symmetrical.
The basic idea of this circuit is to convert the indication of a magnetic sensor to an audio tone...
This untuned circuit uses one of the world's first commercial transistors, the CK722, having been...
We found this circuit in the May 1989 issue of Radio Electronics magazine. The circuit uses...