KR100621809B1 - 확산 스펙트럼 클럭 발생기 - Google Patents
확산 스펙트럼 클럭 발생기 Download PDFInfo
- Publication number
- KR100621809B1 KR100621809B1 KR1020050128035A KR20050128035A KR100621809B1 KR 100621809 B1 KR100621809 B1 KR 100621809B1 KR 1020050128035 A KR1020050128035 A KR 1020050128035A KR 20050128035 A KR20050128035 A KR 20050128035A KR 100621809 B1 KR100621809 B1 KR 100621809B1
- Authority
- KR
- South Korea
- Prior art keywords
- clock
- modulation
- jitter
- input
- delay
- Prior art date
Links
- 238000001228 spectrum Methods 0.000 title abstract description 28
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 230000001934 delay Effects 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000003111 delayed effect Effects 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000005670 electromagnetic radiation Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/13—Arrangements having a single output and transforming input signals into pulses delivered at desired time intervals
- H03K5/14—Arrangements having a single output and transforming input signals into pulses delivered at desired time intervals by the use of delay lines
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/156—Arrangements in which a continuous pulse train is transformed into a train having a desired pattern
-
- 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
- H03L7/093—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics in the loop
-
- 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
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Manipulation Of Pulses (AREA)
Abstract
Description
Claims (2)
- 입력클럭의 주기를 일정 시간 지연시키는 딜레이 셀을 포함하며, 상기 입력 클럭의 주기를 딜레이 셀의 수로 환산하는 입력클럭 환산부;외부로부터 변조 속도 및 변조 주파수 데이터가 인가되고, 상기 입력클럭 환산부로부터 환산된 딜레이 셀의 수가 인가되며, 상기 인가된 변조 속도와 변조 주파수 데이터 및 상기 환산된 딜레이 셀의 수를 이용하여 변조된 입력클럭의 총 지터 주기 및 총 지터 변화폭에 대한 딜레이 셀의 수를 연산하는 지터 딜레이 연산부;외부로부터 변조 주파수 데이터가 인가되고, 상기 인가된 변조 주파수에 의해 변조된 입력클럭수를 연산하는 변조 클럭수 연산부;상기 지터 딜레이 연산부로부터 인가된 총 지터 주기 및 총 지터 변화폭에 대한 딜레이 셀의 수와 상기 변조 클럭수 연산부로부터 인가된 변조 입력클럭수를 이용하여 인접한 변조 입력클럭간의 지터 변화폭을 연산하고, 이를 누적시키는 변조클럭 지터 누적부;상기 변조클럭 지터 누적부에서 누적된 변조 입력클럭간의 지터 변화폭과 상기 상기 지터 변화폭에 해당되는 딜레이 수를 비교하여 출력클럭의 에지를 연산하는 출력클럭 에지 연산부; 및상기 출력클럭 에지 연산부로부터 연산된 에지를 인가받아 상기 에지를 가지는 출력클럭을 발생시키는 출력단;을 포함하는 확산 스펙트럼 클럭 발생기.
- 제 1항에 있어서,상기 입력클럭의 주기에 해당되는 딜레이 셀의 수는, 상기 입력클럭 환산부에서 지연된 입력클럭의 에지와 상기 출력단으로부터 발생된 출력클럭의 에지가 일치하는 시점의 딜레이 수와 동일한 것을 특징으로 하는 확산 스펙트럼 클럭 발생기.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020050128035A KR100621809B1 (ko) | 2005-12-22 | 2005-12-22 | 확산 스펙트럼 클럭 발생기 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020050128035A KR100621809B1 (ko) | 2005-12-22 | 2005-12-22 | 확산 스펙트럼 클럭 발생기 |
Publications (1)
Publication Number | Publication Date |
---|---|
KR100621809B1 true KR100621809B1 (ko) | 2006-09-19 |
Family
ID=37631380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020050128035A KR100621809B1 (ko) | 2005-12-22 | 2005-12-22 | 확산 스펙트럼 클럭 발생기 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR100621809B1 (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100879781B1 (ko) | 2007-08-30 | 2009-01-22 | 주식회사 하이닉스반도체 | 확산-스펙트럼 클럭 발생장치 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0993164A (ja) * | 1996-07-23 | 1997-04-04 | Yaesu Musen Co Ltd | スペクトル拡散受信方式 |
JP2004153637A (ja) | 2002-10-31 | 2004-05-27 | Rohm Co Ltd | クロック生成装置 |
JP2005148972A (ja) | 2003-11-13 | 2005-06-09 | Kawasaki Microelectronics Kk | クロック信号生成回路 |
-
2005
- 2005-12-22 KR KR1020050128035A patent/KR100621809B1/ko active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0993164A (ja) * | 1996-07-23 | 1997-04-04 | Yaesu Musen Co Ltd | スペクトル拡散受信方式 |
JP2004153637A (ja) | 2002-10-31 | 2004-05-27 | Rohm Co Ltd | クロック生成装置 |
JP2005148972A (ja) | 2003-11-13 | 2005-06-09 | Kawasaki Microelectronics Kk | クロック信号生成回路 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100879781B1 (ko) | 2007-08-30 | 2009-01-22 | 주식회사 하이닉스반도체 | 확산-스펙트럼 클럭 발생장치 |
US7750713B2 (en) | 2007-08-30 | 2010-07-06 | Hynix Semiconductor Inc. | Spread spectrum clock generator |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8024598B2 (en) | Apparatus and method for clock generation with piecewise linear modulation | |
US8258877B2 (en) | Feed-back and feed-forward systems and methods to reduce oscillator phase-noise | |
US7869769B2 (en) | Method and apparatus for reconfigurable frequency generation | |
Lee et al. | The design and analysis of a DLL-based frequency synthesizer for UWB application | |
EP1987590B1 (en) | Spread-spectrum clocking | |
US7495496B2 (en) | Method and circuit for producing spread spectrum and/or over clock signal | |
US9397647B2 (en) | Clock spurs reduction technique | |
GB2459108A (en) | Dithered clock signal generator | |
US9257999B1 (en) | Compensating for a known modulated interferer to a controlled oscillator of a phase-locked loop | |
US10075145B2 (en) | Phase noise measurement and filtering circuit | |
US20030169838A1 (en) | EMI reduction using tunable delay lines | |
US20090129524A1 (en) | Spread spectrum clock generators | |
US12003246B2 (en) | Methods and systems for atomic clocks with high accuracy and low Allan deviation | |
KR20110130330A (ko) | 자기잡음제거 전압제어발진기를 이용한 주파수-위상고정루프 | |
US8000406B2 (en) | Timing of ultra wideband pulse generator | |
US9900145B2 (en) | Clock generator and method for reducing electromagnetic interference from digital systems | |
US7443905B1 (en) | Apparatus and method for spread spectrum clock generator with accumulator | |
JP2010288073A (ja) | スペクトラム拡散クロック生成器及び半導体装置 | |
KR100621809B1 (ko) | 확산 스펙트럼 클럭 발생기 | |
KR101298621B1 (ko) | Fmcw 주파수 합성기 및 그것의 제어 방법 | |
CN111490782B (zh) | 直接上变频发射机的上变频器及上变频方法 | |
US8106687B2 (en) | Spread spectrum clock system and spread spectrum clock generator | |
JP2010141519A (ja) | 位相同期回路、および通信装置 | |
KR20070063260A (ko) | 클럭 발생 장치 및 방법 | |
US20240283458A1 (en) | Clock and data recovery circuit with spread spectrum clocking synthesizer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20120823 Year of fee payment: 7 |
|
FPAY | Annual fee payment |
Payment date: 20130821 Year of fee payment: 8 |
|
FPAY | Annual fee payment |
Payment date: 20140820 Year of fee payment: 9 |
|
FPAY | Annual fee payment |
Payment date: 20150818 Year of fee payment: 10 |
|
FPAY | Annual fee payment |
Payment date: 20160817 Year of fee payment: 11 |
|
FPAY | Annual fee payment |
Payment date: 20170818 Year of fee payment: 12 |
|
FPAY | Annual fee payment |
Payment date: 20180820 Year of fee payment: 13 |