We found this circuit in an English publication from the 1980s. The circuit uses current components and can be tuned for frequencies between 300 and 1500 Hz.
Created to serve as a booster for TV signals in the UHF band, this circuit was found in the March...
This circuit can supply output voltages from 50 to 250 V from an input voltage of 300 V. The...
Square, triangular and sawtooth signals are produce by this circuit. Frequency is adjusted by P1...