Voltage regulator

Voltage regulator

  • CN 101,227,146 B
  • Filed: 12/04/2007
  • Issued: 07/23/2014
  • Est. Priority Date: 12/08/2006
  • Status: Active Grant
First Claim
Patent Images

1. a voltage regulator, it has phase compensating circuit, and from lead-out terminal to load, output is controlled as constant voltage, it is characterized in that, and this voltage regulator has:

  • The first transistor, its grid is connected with the output of error amplifier, and source electrode is connected with power supply;

    Output transistor, its grid is connected with the output of described error amplifier, and source electrode is connected with described power supply, and drain electrode is connected with described lead-out terminal;

    Transistor seconds, its grid is connected with the 3rd transistorized grid, and source electrode is connected with the drain electrode of described the first transistor;

    Described the 3rd transistor, its source electrode is connected with described lead-out terminal, and grid and drain electrode interconnect;

    Resistive element, it is located between the drain electrode and ground of described transistor seconds;

    Constant current source, it is located between described the 3rd transistorized drain electrode and described ground;

    Bleeder circuit, it is located between described lead-out terminal and described ground;

    Electric capacity, it is located between the drain electrode of described the first transistor and the output of described bleeder circuit;

    Reference voltage circuit;

    AndError amplifier, its first terminal is connected with the output of described reference voltage circuit, and the second terminal is connected with the output of described bleeder circuit,The variation in voltage of the drain electrode of described the first transistor is identical with the variation in voltage of described lead-out terminal and with signal, be transfused to the second terminal of described error amplifier with the state phase compensation irrelevant and that gain is determined according to the voltage of described lead-out terminal of described load.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×