Horizontal oscillator circuit has oscillator stage generating signal synchronised with horizontal synchronising input signal, control capacitors, controlled constant current source

摘要

The circuit has an oscillator stage (1) for generating an output signal synchronised with a horizontal synchronising input signal (HD), a first capacitor (8a) with one end connected to an oscillation region and an earthed second end for controlling the frequency of the output signal and a second capacitor (8b) between the first end of the first capacitor and a diode (10) and constant current arrangement (40) with a control voltage input.