This 20W amplifier was found in 283 circuits from the 90s. The MOSFET admits equivalents. The power supply must be dual, and the transistors must be mounted on good heat sinks.
The presence of a low resistance between the terminals of the sensor causes this modulated...
This circuit was found in a 1970 IEEE publication. The circuit functions as a voltage controlled...
I found this circuit in a 1992 Electronics Experimenter Handbook. The circuit can be easily...