Power supply circuit

Power supply circuit

  • CN 1,042,277 C
  • Filed: 08/07/1992
  • Issued: 02/24/1999
  • Est. Priority Date: 08/08/1991
  • Status: Active Grant
First Claim
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1. one kind from the power-supplying circuit of battery supply at least the first and second electric, it is characterized in that comprising:

  • Directly from the device of described power supply to described first electric;

    Be used for described power source voltage and reference voltage voltage detecting circuit relatively;

    The booster circuit that is used to promote described power source voltage and exports the voltage that promotes;

    Be used for from described power supply to the device of described second electric and comprise a change-over circuit, output signal according to described voltage detecting circuit, when described power source voltage is not less than reference voltage, be used for described power supply is connected with described second load, and described booster voltage be connected in described second load when described supply voltage becomes when being lower than reference voltage.

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