POWER SUPPLY AND IMAGE SHAPING DEVICE INCORPORATING SUCH POWER SUPPLY Russian patent published in 2008 - IPC H02M3/28 

FIELD: electrical engineering.

SUBSTANCE: proposed power supply has plurality of power supply circuits, each incorporating piezoelectric converter, rectifying component that functions to rectify power and to eliminate ripples in voltage applied across piezoelectric converter output depending on load, and also to supply voltage to output; voltage-controlled generator that functions to control output signal frequency in compliance with input control signal; power voltage supply unit excited by signal fed to voltage-controlled generator output and used to feed power voltage to piezoelectric converter. One power circuit has resonance-tuned frequency variation unit connected to output end of piezoelectric converter. Resonance-tuned frequency variation unit excites piezoelectric converter in power circuit at excitation frequency differing from piezoelectric converter excitation frequency in other power circuit and depends for its operation on shifting peak of resonance-tuned frequency.

EFFECT: enhanced image quality.

11 cl, 24 dwg