KR20180031463A - 주파수 합성기 및 이를 구비하는 저잡음 장치 - Google Patents
주파수 합성기 및 이를 구비하는 저잡음 장치 Download PDFInfo
- Publication number
- KR20180031463A KR20180031463A KR1020160120136A KR20160120136A KR20180031463A KR 20180031463 A KR20180031463 A KR 20180031463A KR 1020160120136 A KR1020160120136 A KR 1020160120136A KR 20160120136 A KR20160120136 A KR 20160120136A KR 20180031463 A KR20180031463 A KR 20180031463A
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- KR
- South Korea
- Prior art keywords
- frequency
- voltage
- frequency synthesizer
- phase
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/081—Details of the phase-locked loop provided with an additional controlled phase shifter
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
- H04L7/033—Speed or phase control by the received code signals, the signals containing no special synchronisation information using the transitions of the received signal to control the phase of the synchronising-signal-generating means, e.g. using a phase-locked loop
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
본 발명에 따른 주파수 합성기는 위상비교기(PFD)의 출력을 증폭하는 가변 차지펌프(가변 CP)와, 루프필터의 출력단자로부터 고주파 성분이 제거된 출력 전압을 전류로 변환한 후 상기 위상비교기에 제공하는 전압-전류 변환기를 구비하는 것을 특징으로 한다.
본 발명에 따른 주파수 합성기 및 이를 구비하는 저잡음 장치에 의해서 락킹 타임과 저잡음 특성을 모두 개선할 수 있게 되었다.
Description
도 2는 본 발명에 따른 일 실시예인 주파수 합성기의 구성도.
도 3은 본 발명에 따른 주파수 합성기를 구성하는 전압-전류 변환기의 특성 그래프.
Claims (4)
- 입력 클럭 신호(CLKIN)의 위상과 궤환된 위상과의 위상차를 검출하고, 상기 위상차에 비례하는 전압을 출력하는 위상비교기(PFD)와,
상기 위상비교기(PFD)의 출력을 증폭하는 가변 차지펌프(가변 CP)와,
상기 가변 차지펌프(가변 CP)에서 출력되는 신호에 포함된 고주파 성분을 제거하는 루프필터(Loop filter)와,
상기 루프필터의 출력단자로부터 고주파 성분이 제거된 출력 전압을 전류로 변환한 후 상기 위상비교기에 제공하는 전압-전류 변환기와,
상기 루프필터에서 출력되는 제어 전압에 따라 조절되는 주파수를 발생시키는 전압제어발진기(VCO) 및
상기 전압제어발진기(VCO)로부터 입력되는 주파수를 분수 1/N배 되는 주파수를 출력하는 주파수 분배기(DIV)를 포함하는 것을 특징으로 하는 주파수 합성기.
- 제1항의 주파수 합성기를 포함하는 위상고정 루프(Phase Lock Loop, PLL).
- 제1항의 주파수 합성기를 포함하는 지연고정 루프(Delayed Lock Loop, DLL).
- 제1항의 주파수 합성기를 포함하는 클럭데이터 복원기.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160120136A KR20180031463A (ko) | 2016-09-20 | 2016-09-20 | 주파수 합성기 및 이를 구비하는 저잡음 장치 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160120136A KR20180031463A (ko) | 2016-09-20 | 2016-09-20 | 주파수 합성기 및 이를 구비하는 저잡음 장치 |
Publications (1)
Publication Number | Publication Date |
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KR20180031463A true KR20180031463A (ko) | 2018-03-28 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1020160120136A Ceased KR20180031463A (ko) | 2016-09-20 | 2016-09-20 | 주파수 합성기 및 이를 구비하는 저잡음 장치 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR20180031463A (ko) |
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2016
- 2016-09-20 KR KR1020160120136A patent/KR20180031463A/ko not_active Ceased
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