Power supply network for resonant loads - incorporates voltage controlled oscillator controlled by phase difference between voltage supplied to load and that across capacitor in load

摘要

The power supply, for resonant loads, has a voltage controlled oscillator and a device supplying the load with the oscillator output. A phase detector monitors the phase of the voltage supplied to the load and the voltage developed across a capacitor in the load. It produces an output depending on the relative phase of these two voltages. The phase detector's output is averaged and compared with a reference and the result used to control the oscillator.