| 摘要 |
1. Direct voltage/direct voltage converter circuit in push-pull configuration, consisting of a push-pull transistor pair, a transformer with three primary windings, with the secondary winding connected with output terminals, whereas, the first transistor collector is connected with the first diode cathode and the first capacitor plate and via the first induction coil with the positive terminal of the power supply, and the second transistor collector is connected with the second diode cathode and the second capacitor plate and via the second induction coil also with the positive terminal of the power supply, whereas emitters of both transistors, diode anodes and second capacitor plates are connected with the common bus and the negative terminal of the power supply, while the beginning of the first primary winding and the end of the second primary winding of the transformer make a common node, characterised in that the common node (A) is connected with the third transistor emitter (T3), the capacitor plate (C6) and the resistor (R4), whereas the other terminal of resistor (R4) is connected with the of Zener diode anode (D3), whereas the cathode is connected with the Zener diode cathode (D4), with the capacitor plate (C7), with the of transoptor's phototransistor collector (TO) and with resistor (R3), whereas the other terminal of the resistor (R3) is connected with the first input terminal (1), and the transoptor's phototransistor emitter (TO) is connected with the other plates of capacitors (C6, C7) and with the input terminal (2) and the transistor collector (T3), whose base via transistor R5)..<IMAGE>
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