Enhanced all digital phase-locked loop and oscillation signal generation method thereof 스퍼를 감소시킨 올-디지털 피엘엘 및 이를 이용한 발진 신호 발생 방법

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 105
  • Download : 0
An All Digital PLL (ADPLL) and oscillation signal generation method using the ADPLL is provided for generating a spur-free oscillation signal by improving the frequency resolution of the ADPLL. An all digital phase-locked loop of the present invention includes a digitally controlled oscillator for generating an oscillation signal having a frequency corresponding to an inputted control signal, a re-timer for retiming a reference clock based on the oscillation signal, a feedback circuit for accumulating a number of clocks of the oscillation signal within a time period and generating a phase information of the oscillation signal in synchronization with the retimed reference clock, a sigma-delta modulator for sigma-delta modulating a frequency command signal into a modulation signal having a less number of bits than a number of bits of the frequency command signal, a reference phase accumulator for accumulating phases corresponding to the modulation signal, a phase difference detector for generating a phase difference information between an output signal of the reference phase accumulator and the phase information, and a digital loop filter for filtering the phase difference information to generate the control signal.
US (United States)
Issue Date
Application Date
Application Number
Registration Date
Registration Number
Appears in Collection
Files in This Item
There are no files associated with this item.


  • mendeley


rss_1.0 rss_2.0 atom_1.0