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    • 3. 发明授权
    • Direct-current power source circuit with back gate control circuit for
power MOS-FET
    • 直流电源电路,具有用于功率MOS-FET的背栅控制电路
    • US5180965A
    • 1993-01-19
    • US782318
    • 1991-10-24
    • Tadashi Nose
    • Tadashi Nose
    • G05F1/56G05F1/569H02H3/18
    • H02H3/18G05F1/569
    • A direct current power source circuit has a voltage control power MOS-FET and a back gate control circuit. The voltage control power MOS-FET is connected between an input terminal and an output terminal of the circuit and the back gate control circuit is connected to a back gate of the voltage control power MOS-FET and controls a back gate voltage for causing a parasitic diode between a source and a drain of the power MOS-FET to become a non-conductive state when an input voltage applied to the input terminal becomes a low level. The output of the back gate control circuit is also connected to a voltage dividing circuit which sets an output voltage of the power source circuit. The arrangement enables to prevent a reverse flow of current from the output terminal to the input terminal.
    • 直流电源电路具有电压控制功率MOS-FET和背栅极控制电路。 电压控制功率MOS-FET连接在电路的输入端子和输出端子之间,并且背栅极控制电路连接到电压控制功率MOS-FET的背栅极,并控制用于引起寄生的背栅极电压 当施加到输入端子的输入电压变为低电平时,功率MOS-FET的源极和漏极之间的二极管变为非导通状态。 背栅极控制电路的输出也连接到设置电源电路的输出电压的分压电路。 该布置能够防止从输出端子到输入端子的电流的反向流动。