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    • 6. 发明授权
    • Push-pull, resonant type switching power supply circuit
    • 推挽式谐振型开关电源电路
    • US5548502A
    • 1996-08-20
    • US297044
    • 1994-08-29
    • Mitsuo Kosugi
    • Mitsuo Kosugi
    • H02M3/28H02M3/337H02M3/335H02M7/538
    • H02M3/337Y02B70/1433
    • To provide a resonant switching power supply switch with a simple structure and little noise, a push-pull resonant switching power supply circuit includes a transformer 104, a capacitor 105, two transistors 106a and 106b (bipolar transistors or field-effect transistors), and a bias circuit 201. The transformer 104 has a rectification circuit 340 connected to its secondary winding. The capacitor 105 forms a parallel resonant circuit in combination with the transformer 104. The transistors 106a and 106b are push-pull connected to the primary winding of the transformer 104 and the bases of which are connected to a feedback winding 104 of transformer. The bias circuit 201 applies a variable bias voltage to the base of the transistors.
    • 为了提供结构简单,噪声小的谐振开关电源开关,推挽谐振开关电源电路包括变压器104,电容器105,两个晶体管106a和106b(双极晶体管或场效应晶体管),以及 偏置电路201.变压器104具有连接到其次级绕组的整流电路340。 电容器105与变压器104组合形成并联谐振电路。晶体管106a和106b被推挽连接到变压器104的初级绕组,其基极连接到变压器的反馈绕组104。 偏置电路201将可变偏置电压施加到晶体管的基极。