Self-excited push-pull converter
AssigneeXiangyang Yin
InventorBaojun Wang
Life of this patent
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Abstract
A self-excited push-pull converter, where between the bases of the push-pull converter's transistors (TR1, TR2) and the effective power suppler there is provided a constant current source (II), which provides a constant current to the bases of the transistors. With the working voltage increases, the circuit enters into an operating mode not based on the core-saturation working mode, because the transistors' base current is limited by the constant current source and consequently the transistors' collector current cannot increase.
Claims19
1-10. (canceled)
A self-excited push-pull converter, comprising an input end, an output end, a transformer, a pair of push-pull switching transistors each of which has a base, and a constant current source located between said input end and said base of said transistors.
A method of producing a self-excited push-pull oscillation in a converter comprising providing a constant current source between bases of push-pull transistors and an effective power supply end so that combined base current of said transistors is limited and remains constant in an event when operating voltage fluctuates.
Dependencies are inferred from the claim text.