We found this circuit that converts a direct voltage into a proportional frequency signal. The circuit is from an Electronics Now from April 1993. The JFET can be of any type.
Found in a 90s Electronic Design, this circuit generates harmonics from a sinusoidal input signal....
Danger always exists and a nuclear war could be underway. Although we can't do more than detect the...
The presented circuit is suggested by Texas Instruments (www.ti.com) in its Application Report...