Title:
INJECTION LOCKED DIGITAL FREQUENCY SYNTHESIZER CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2015/030386
Kind Code:
A1
Abstract:
The present invention relates to a technique capable of implementing a frequency synthesizer circuit separated into a frequency synthesizer circuit section and an injection-locked phase-locked loop circuit section, thereby performing a frequency synthesizer lock operation and an injection lock operation sequentially to implement fast frequency and phase locks. The present invention comprises: a frequency synthesizer for performing frequency and phase lock operations according to fractional number information and a first reference clock signal supplied from the outside and thereby outputting a reset signal and a second reference clock signal; and an injection-locked phase-locked loop which inputs the second reference clock signal as a reference clock and multiplies the second reference clock signal to targeted integral multiple of frequency to thereby output an output clock signal, after the frequency synthesizer is reset by the reset signal inputted when frequency of the frequency synthesizer is locked, and initiates the frequency lock operation.
Inventors:
SIM JAE YOON (KR)
HONG SEUNG HWAN (KR)
HONG SEUNG HWAN (KR)
Application Number:
PCT/KR2014/007316
Publication Date:
March 05, 2015
Filing Date:
August 07, 2014
Export Citation:
Assignee:
POSTECH ACAD IND FOUND (KR)
International Classes:
H03L7/18
Foreign References:
| KR20110081837A | 2011-07-14 | |||
| KR20100083262A | 2010-07-22 | |||
| KR20040027758A | 2004-04-01 |
Attorney, Agent or Firm:
LEE, CHEOL HEE (KR)
이철희 (KR)
이철희 (KR)
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