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2 条记录 (耗时 0.008 秒)

    Power supply circuit
    1.
    发明公开
    Power supply circuit 失效
    电源电路。

    公开(公告)号：EP0069538A1

    公开(公告)日：1983-01-12

    申请号：EP82303449.1

    申请日：1982-07-01

    申请人： FUJITSU LIMITED

    发明人： Arai, Youichi Fujitsu Limited Patent Department ,  Takagi, Masayuki Fujitsu Limited

    IPC分类号： H02H3/247

    CPC分类号： G05F1/585

    摘要： A power supply circuit has a first power source terminal (T,) for application of a plus voltage (+V in ), a second power source terminal (T 2 ) for application of a minus voltage (-V in ), and first (T 4 ) and second (T s ) output terminals for delivery of the first (+V out ) and second (-V out ) output voltages to a load. A first transistor (Tr,) is inserted between the first power source terminal (T,) and the first output terminal (T 4 ), a second transistor (Tr 2 ) is inserted between a base of the first transistor (Tr 2 ) and a ground potential line (GND) and is controlled by the voltages (+V in , -V in ) applied to the first (T 1 ) and second (T 2 ) power source terminals, and a capacitor is connected between the second output terminals (T 5 ) and the ground potential line (GND). The sequence of application of output voltages (+V out , -V out ) to the load, and the sequence of cutting-off of output voltages (+V out , -V out ) from the load are predetermined irrespective of the sequence of the application of the plus voltage (+V,n) and the minus voltage (-V,n) to the circuit, and irrespective of the sequence of cutting-off of the plus voltage (+V in ) and the minus voltage (-V in ) from the circuit.