Voltage to frequency converter (CB9449E)

This circuit was obtained from a 90s Radio Electronics. The components used are from that time. The FET admits equivalent.

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Light-controlled oscillator (CB7874E)
This circuit has the intensity of the signals controlled by the light that falls on the sensor....
Output Limited Oscillator (CB4176E)
The purpose of the diode in this oscillator circuit is to limit the amplitude of the output...
Ladder Generator (CB23757E)
We found this ladder-shaped signal generator circuit in Radio Electronics magazine from August 1966....