SINGLE-CYCLE D C/D C CONVERTER Russian patent published in 1995 - IPC

FIELD: conversion equipment. SUBSTANCE: converter operates as self-sustained generator. Under this condition with transistor 1 open choke 3 accumulates energy which it generates in load circuit 19 after transistor blanking. Decrease of input current of transistor 1 starts when it is open at moment while current growing linearly reaches level at which voltage across resistor 5 renders stabilizer diode 9 conducting. As a result of action of negative feedback transistor 1 starts blanking and at this moment positive feedback starts acting in circuit: transistor 1 - winding 12 of choke 3 - resistor 10 and forcing network 11 - transistor 1. Owing to the fact that negative feedback is attenuated by ohmic resistance of network: stabilizer diode 9 - resistor 8 and positive feedback is amplified by use of forcing network 11 transistor 1 switches on within short time without delay. EFFECT: enhanced which power transistor operates under active mode. 3 cl, 2 dwg