SINGLE-CYCLE DIRECT VOLTAGE CONVERTER Russian patent published in 1997 - IPC

FIELD: secondary power supply units. SUBSTANCE: device has switching transistor 1, regulation transistor 2, transformer 3 which has primary winding 3.1, first secondary winding 3.2 and second secondary winding 3.3, diode 4, capacitor filter 5, base resistor 6, starting resistor 7, second and third base resistors and input terminals 10 and 11 and output terminals 12 and 13. Starting circuit, which has resistors 7 and 6 has high resistance so that all starting current is sent to base of transistor 1. In addition resistance of resistor 8 can be very low. EFFECT: increased efficiency. 1 dwg