AC/DC power circuit

AC/DC power circuit

  • CN 1,908,843 A
  • Filed: 08/07/2006
  • Published: 02/07/2007
  • Est. Priority Date: 08/07/2006
  • Status: Active Grant
First Claim
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1. , a kind of power circuit is characterized in that, it includes:

  • One input electric crystal couples a voltage source;

    One first electric crystal is series at this input electric crystal so that a supply voltage to be provided;

    One input circuit for detecting is coupled to this voltage source and produces a controlling signal with the voltage quasi position according to this voltage source;

    One second electric crystal is coupled to this input circuit for detecting, this input electric crystal and this first electric crystal, and when the voltage quasi position of this voltage source was higher than a critical voltage, this second electric crystal was imported electric crystal and this first electric crystal according to this controlling signal by this;

    One output circuit for detecting is coupled to this supply voltage and produces one first enable signal and one second enable signal with the voltage quasi position according to this supply voltage;

    One impedance means is coupled to this input electric crystal and this first electric crystal, this input electric crystal of conducting and this first electric crystal so that bias voltage to be provided;

    Wherein, when the voltage quasi position of this supply voltage is higher than the accurate position of a high output voltage, this first enable signal is by this input electric crystal and this first electric crystal, and this second enable signal was by the output of this power circuit when the voltage quasi position of this supply voltage was lower than low output voltage standard position.

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