Power supply switching circuit and electronic device adopting the same

Power supply switching circuit and electronic device adopting the same

  • CN 103,457,347 A
  • Filed: 06/14/2012
  • Published: 12/18/2013
  • Est. Priority Date: 06/04/2012
  • Status: Active Grant
First Claim
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1. a power supply switch circuit, is characterized in that, this power supply switch circuit comprises:

  • The first voltage regulation unit, in order to receive the first power supply signal, and produce the first fixed voltage signal according to this first power supply signal;

    The control signal generation unit, be electrically connected this first voltage regulation unit, in order to receive second source signal and this first fixed voltage signal, to produce at least one control signal;

    AndThe electrical source exchange unit, be electrically connected this first voltage regulation unit and this control signal generation unit, is controlled by this control signal, usings and select this first fixed voltage signal or this second source signal as the power supply output signal.

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