Delay phase locking return circuit and delay phase locking method

Delay phase locking return circuit and delay phase locking method

  • CN 103,259,535 A
  • Filed: 02/15/2012
  • Published: 08/21/2013
  • Est. Priority Date: 02/15/2012
  • Status: Active Application
First Claim
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1. delay locked loop circuit includes:

  • One voltage-controlled delay circuit is characterized in that, is used for producing the differential signal of a plurality of particular phases and a feedback signal according to an incoming frequency source and a control voltage;

    One detector one of is used in the middle of the phase place of this incoming frequency source relatively and this feedback signal and the frequency at least the person, to produce at least one detection signal;

    One charge pump is used for producing this control voltage according to this at least one detection signal;

    AndOne phase place is selected buffer, is used for producing an output frequency source according to the differential signal of these a plurality of particular phases;

    Wherein the differential signal of each particular phases of the differential signal of these a plurality of particular phases comprises at least one positive phase signals and an inversion signal, and this feedback signal is this inversion signal for person one of in the middle of the differential signal of these a plurality of particular phases.

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