PUSH-PULL DC VOLTAGE CONVERTER Russian patent published in 2004 - IPC

FIELD: electrical engineering; converter engineering; power supplies. SUBSTANCE: device that uses same resistors for starting and running conditions has dc voltage supply 1, two transistors 2 and 3, such as those of p-n-p type, using supply voltage for their driving in conduction and cutting off, transformer 4 whose primary winding AX has each of its terminals connected to collector of p-n-p transistor or to emitter of n- p-n transistor, and center tap 0, to minus of power supply, feedback winding a₁x₁, and secondary winding ax connected to load 5. Connected in series with feedback winding a₁x₁ is capacitor 6, and this circuit is inserted between bases of transistors 2 and 3. Resistor 7 is inserted between base of transistor 2 and negative pole of dc voltage supply 1; similar resistor 8 is inserted between base of transistor 3 and same pole of voltage supply 1. EFFECT: enhanced stability of square-pulse generation frequency. 1 cl, 2 dwg