KR970002949B1 - 디지탈 통신시스템의 클럭발생방법 및 그 회로 - Google Patents
디지탈 통신시스템의 클럭발생방법 및 그 회로 Download PDFInfo
- Publication number
- KR970002949B1 KR970002949B1 KR1019940011407A KR19940011407A KR970002949B1 KR 970002949 B1 KR970002949 B1 KR 970002949B1 KR 1019940011407 A KR1019940011407 A KR 1019940011407A KR 19940011407 A KR19940011407 A KR 19940011407A KR 970002949 B1 KR970002949 B1 KR 970002949B1
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- discharge
- phase
- clocks
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- clock
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/04—Speed or phase control by synchronisation signals
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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
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
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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
- H03L7/0812—Details of the phase-locked loop provided with an additional controlled phase shifter and where no voltage or current controlled oscillator is used
-
- 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
-
- 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
- H04L7/0337—Selecting between two or more discretely delayed clocks or selecting between two or more discretely delayed received code signals
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
Description
Claims (12)
- 입력되는 데이터비트열을 추출하기 위한 동기클럭을 발생하는 디지탈 통신시스템의 클럭발생회로에 있어서, 소정의 동일주파수를 가지며 각각의 위상이의 위상지연을 갖는 2n개의 클럭들을 출력하는 클럭발생부(22)와, 입력되는 데이터비트열의 위상과 상기 2n개의 클럭들의 위상을 비교하여 그 위상차를 검출하는 위상차검출부(18)와, 상기 위상차검출부(18)에서 출력되는 위상차에 응답하여 위상제어신호를 출력하는 루프필터(20)와, 상기 위상제어신호에 응답하여 클럭발생부(22)로부터 출력되는 클럭들의 위상지연을 제어하여 대응 데이터비트의 중점에서 라이징에지를 갖도록 조정하여 출력하는 위상제어부(24)로 구성됨을 특징으로 하는 디지탈 통신시스템의 클럭발생회로.
- 제1항에 있어서, 상기 위상차검출부(18)가, 동작전압을 공급하는 제1로드(R1)에 접속되고 제1검출신호(CTRL)를 출력하며 상기 입력 데이터비트의 논리레벨에 따라 제1방전노드(N3) 또는 제2방전노드(N4)에 선택적으로 접속되는 제1출력노드(N1)와, 동작전압이 공급되는 제2로드(R2)에 접속되고 제2검출신()를 출력하며 상기 제1출력노드(N1)와 반대로 제1방전노드(N3) 또는 제2방전노드(N4)에 선택적으로 접속되는 제2출력노드(N2)와, 상기 클럭들의 논리레벨에 대응하여 제1방전노드(N3) 및 제2방전노드(N4)가 교번적으로 접지단에 연결되도록 방전경로를 형성하는 방전제어부(100)를 구비함을 특징으로 하는 디지탈 통신시스템의 클럭발생회로.
- 제2항에 있어서, 상기 방전제어부(100)가, 각각의 일단이 제1 및 제2방전노드(N3, N4)에 n개씩 병렬접속된 2n개의 방전패스들과, 상기 방전패스들의 타단과 접지단 사이에 형성된 전류원(45)으로 구성되며, 상기 클럭들의 논리레벨에 대응하여 제1방전노드(N3)측에 접속된 어느하나의 방전패스와 제2방전노드(N4)측에 접속된 어느 하나의 방전패스가 서로 교번적으로 방전경로를 형성함을 특징으로 하는 디지탈 통신시스템의 클럭발생회로.
- 제1항에 있어서, 상기 루프필터(20)가, 상기 제1검출신호(CTRL) 및 제2검출신호()를 비교입력으로 갖는 차동증폭기 및 부하소자인 커런트 미러와, 상기 커런트 미러의 출력노드에 접속되며 그에 따른 충전전압을 위상제어신호(VCTL)로 출력하는 캐패시터(54)로 구성됨을 특징으로 하는 디지탈 통신시스템의 클럭발생회로.
- 제1항 내지 제4항 중 어느 한 항에 있어서, 상기 클럭들의 주파수는 입력데이타가 갖는 최대전송속도의임을 특징으로 하는 디지탈 통신시스템의 클럭발생회로.
- 수신된 데이터비트열로부터 데이터를 샘플링하기 위한 동기클럭을 출력하는 디지탈 통신시스템의 클럭발생회로에 있어서, 위상제어신호에 주파수 변환되며 서로의 위상차를 차례로 갖는 2n개의 클럭들을 데이터수신부의 수신동기클럭으로 제공하는 전압제어발진기와, 입력되는 데이터비트열의 위상과 상기 2n개의 클럭들의 위상차를 검출하는 위상차검출부(18)와, 상기 위상차검출부(18)에서 출력되는 위상차신호에 응답하여 상기 클럭들의 라이징에지가 대응 데이터비트의 중점에 일치하도록 제어하는 상기 위상제어신호를 상기 전압제어발진기에 공급하는 루프필터로 구성됨을 특짐으로 하는 디지탈 통신시스템의 클럭발생회로.
- 제6항에 있어서, 상기 위상차검출부(18)가, 동작전압을 공급하는 제1로드(R1)에 접속되고 제1검출신호(CTRL)를 출력하며 상기 입력 데이터비트의 논리레벨에 따라 제1방전노드(N3) 또는 제2방전노드(N4)에 선택적으로 접속되는 제1출력노드(N1)와, 동작전압이 공급되는 제2로드(R2)에 접속되고 제2검출신호()를 출력하며 상기 제1출력노드(N1)와 반대로 제1방전노드(N3) 또는 제2방전노드(N4)에 선택적으로 접속되는 제2출력노드(N2)와, 상기 클럭들의 논리레벨에 대응하여 제1방전노드(N3) 및 제2방전노드(N4)가 교번적으로 접지단에 연결되도록 방전경로를 형성하는 방전제어부(100)를 구비함을 특징으로 하는 디지탈 통신시스템의 클럭발생회로.
- 제7항에 있어서, 상기 방전제어부(100)가, 각각의 일단이 제1 및 제2방전노드(N3, N4)에 n개씩 방전패스들과, 상기 방전패스들의 타단과 접지단 사이에 형성된 전류원(45)으로 구성되며, 상기 클럭들의 논리레벨에 대응하여 제1방전노드(N3)측에 접속된 어느 하나의 방전패스와 제2방전노드(N4)측에 접속된 어느 하나의 방전패스가 서로 교번적으로 방전경로를 형성함을 특징으로 하는 디지탈 통신시스템의 클럭발생회로.
- 제6항에 있어서, 상기 루프필터(20)가, 상기 제1검출신호(CTRL) 및 제2검출신호()를 비교입력으로 갖는 차동증폭기 및 부하소자인 커런트 미러와, 위상제어신호가 출력되는 상기 커런트 미러의 출력노드와 저항을 통하여 접속되는 캐패시터(54)로 구성됨을 특징으로 하는 디지탈 통신시스템의 클럭발생회로.
- 제6항내지 제9항중 어느 한 항에 있어서, 상기 클럭들의 주파수는 입력데이터가 갖는 최대전송속도의임을 특징으로 하는 디지탈 통신시스템의 클럭발생회로.
- 입력되는 데이터비트열로부터 데이터수신을 위한 동기클럭을 발생하는 디지탈 통신시스템의 클럭발생방법에 있어서, 소정의 동일주파수를 가지며 각각의 위상이의 위상지연을 차례로 가지는 2n개의 클럭들을 출력하는 과정과, 입력되는 데이터비트열의 위상과 상기 2n개의 클럭들의 위상차를 검출하는 과정과, 상기 위상차에 따라 위상지연을 제어하기 위한 위상제어신호를 출력하는 과정과, 상기 위상제어신호에 응답하여 상기 클럭들의 라이징에지가 대응되는 데이터비트의 중점에 일치되도록 위상지연을 조정하는 과정으로 구성됨을 특징으로 하는 디지탈 통신시스템의 클럭발생방법.
- 제11항에 있어서, 상기 클럭들의 주파수는 입력데이타가 갖는 최대전송속도의임을 특징으로 하는 디지탈 통신시스템이 클럭발생방법.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019940011407A KR970002949B1 (ko) | 1994-05-25 | 1994-05-25 | 디지탈 통신시스템의 클럭발생방법 및 그 회로 |
US08/332,561 US5574756A (en) | 1994-05-25 | 1994-10-31 | Method for generating digital communication system clock signals & circuitry for performing that method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019940011407A KR970002949B1 (ko) | 1994-05-25 | 1994-05-25 | 디지탈 통신시스템의 클럭발생방법 및 그 회로 |
Publications (2)
Publication Number | Publication Date |
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KR950035187A KR950035187A (ko) | 1995-12-30 |
KR970002949B1 true KR970002949B1 (ko) | 1997-03-13 |
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KR1019940011407A Expired - Lifetime KR970002949B1 (ko) | 1994-05-25 | 1994-05-25 | 디지탈 통신시스템의 클럭발생방법 및 그 회로 |
Country Status (2)
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US (1) | US5574756A (ko) |
KR (1) | KR970002949B1 (ko) |
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-
1994
- 1994-05-25 KR KR1019940011407A patent/KR970002949B1/ko not_active Expired - Lifetime
- 1994-10-31 US US08/332,561 patent/US5574756A/en not_active Expired - Lifetime
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US5574756A (en) | 1996-11-12 |
KR950035187A (ko) | 1995-12-30 |
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