B21126E)
This circuit was taken from an old Popular Electronics. The circuit can have its frequency changed from an external signal. The center frequency is given by C1.
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...