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 1980s telecommunications documentation, the circuit presented acts as a product...
This circuit was found in the Electronics Experimenter Handbook from 1991. The circuit controls a simple...
The time obtained in this circuit, from a 1978 publication, depends on R3 and C. R3 can have...