DE69720305T2 - Digitales Verfahren und Gerät zur Abschwächung von EMI Strahlung in digital getakteten Systemen - Google Patents

Digitales Verfahren und Gerät zur Abschwächung von EMI Strahlung in digital getakteten Systemen

Info

Publication number
DE69720305T2
DE69720305T2 DE69720305T DE69720305T DE69720305T2 DE 69720305 T2 DE69720305 T2 DE 69720305T2 DE 69720305 T DE69720305 T DE 69720305T DE 69720305 T DE69720305 T DE 69720305T DE 69720305 T2 DE69720305 T2 DE 69720305T2
Authority
DE
Germany
Prior art keywords
digital method
emi radiation
clocked systems
attenuating emi
digitally
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.)
Expired - Lifetime
Application number
DE69720305T
Other languages
English (en)
Other versions
DE69720305D1 (de
Inventor
Robert B E Puckette
Preston D Brown
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hewlett Packard Development Co LP
Original Assignee
Hewlett Packard Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of DE69720305D1 publication Critical patent/DE69720305D1/de
Application granted granted Critical
Publication of DE69720305T2 publication Critical patent/DE69720305T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
    • G06F1/10—Distribution of clock signals, e.g. skew
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/60—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers
    • G06F7/62—Performing operations exclusively by counting total number of pulses ; Multiplication, division or derived operations using combined denominational and incremental processing by counters, i.e. without column shift
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K23/00—Pulse counters comprising counting chains; Frequency dividers comprising counting chains
    • H03K23/64—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two
    • H03K23/66—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two with a variable counting base, e.g. by presetting or by adding or suppressing pulses
    • H03K23/667—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two with a variable counting base, e.g. by presetting or by adding or suppressing pulses by switching the base during a counting cycle
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/18—Timing circuits for raster scan displays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2215/00—Reducing interference at the transmission system level
    • H04B2215/064—Reduction of clock or synthesizer reference frequency harmonics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2215/00—Reducing interference at the transmission system level
    • H04B2215/064—Reduction of clock or synthesizer reference frequency harmonics
    • H04B2215/067—Reduction of clock or synthesizer reference frequency harmonics by modulation dispersion

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Pure & Applied Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Physics (AREA)
  • Mathematical Analysis (AREA)
  • Computing Systems (AREA)
  • Computational Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Manipulation Of Pulses (AREA)
  • Dc Digital Transmission (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
DE69720305T 1996-01-29 1997-01-27 Digitales Verfahren und Gerät zur Abschwächung von EMI Strahlung in digital getakteten Systemen Expired - Lifetime DE69720305T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/592,975 US5736893A (en) 1996-01-29 1996-01-29 Digital method and apparatus for reducing EMI emissions in digitally-clocked systems

Publications (2)

Publication Number Publication Date
DE69720305D1 DE69720305D1 (de) 2003-05-08
DE69720305T2 true DE69720305T2 (de) 2003-12-11

Family

ID=24372835

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69720305T Expired - Lifetime DE69720305T2 (de) 1996-01-29 1997-01-27 Digitales Verfahren und Gerät zur Abschwächung von EMI Strahlung in digital getakteten Systemen

Country Status (4)

Country Link
US (2) US5736893A (de)
EP (1) EP0786867B1 (de)
JP (1) JP3631573B2 (de)
DE (1) DE69720305T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008027391A1 (de) * 2008-06-09 2009-12-24 Atmel Automotive Gmbh Schaltung, Verfahren zum Empfangeneines Signals und Verwendung eines Zufallsgenerators

Families Citing this family (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5757338A (en) * 1996-08-21 1998-05-26 Neomagic Corp. EMI reduction for a flat-panel display controller using horizontal-line based spread spectrum
US6442188B1 (en) * 1998-07-20 2002-08-27 Intel Corporation Phase locked loop
TW522354B (en) * 1998-08-31 2003-03-01 Semiconductor Energy Lab Display device and method of driving the same
US6294936B1 (en) 1998-09-28 2001-09-25 American Microsystems, Inc. Spread-spectrum modulation methods and circuit for clock generator phase-locked loop
US6405228B1 (en) * 1999-01-14 2002-06-11 Cypress Semiconductor Corp. Self-adjusting optimal delay time filter
JP3267260B2 (ja) 1999-01-18 2002-03-18 日本電気株式会社 位相同期ループ回路及びそれを使用した周波数変調方法
US6687319B1 (en) * 1999-02-04 2004-02-03 Rambus Inc. Spread spectrum clocking of digital signals
KR100326200B1 (ko) * 1999-04-12 2002-02-27 구본준, 론 위라하디락사 데이터 중계장치와 이를 이용한 액정패널 구동장치, 모니터 장치 및 표시장치의 구동방법
DE19918026B4 (de) * 1999-04-21 2006-03-09 Infineon Technologies Ag Oszillatorschaltung mit verminderter Störstrahlung
US6229400B1 (en) * 1999-10-22 2001-05-08 Motorola Inc. Method and apparatus for a calibrated frequency modulation phase locked loop
JP3525831B2 (ja) 1999-11-17 2004-05-10 日本電気株式会社 クロック信号伝送方式及びディジタル信号伝送方式並びにクロック信号伝送方法及びディジタル信号伝送方法
TW439318B (en) * 1999-11-30 2001-06-07 Mitac Int Corp Counteracting circuit using a signal generator to depress EMI of high speed circuit
US6876339B2 (en) 1999-12-27 2005-04-05 Semiconductor Energy Laboratory Co., Ltd. Semiconductor device and driving method thereof
US6643317B1 (en) * 2000-02-25 2003-11-04 Electronics For Imaging, Inc. Digital spread spectrum circuit
US6665019B1 (en) * 2000-07-28 2003-12-16 Koninklijke Philips Electronics N.V. Method and apparatus for spread spectrum clocking of digital video
US7050478B1 (en) * 2000-08-03 2006-05-23 International Business Machines Corporation Apparatus and method for synchronizing clock modulation with power supply modulation in a spread spectrum clock system
US6970151B1 (en) * 2000-09-01 2005-11-29 Rockwell Collins Display controller with spread-spectrum timing to minimize electromagnetic emissions
US6404834B1 (en) 2000-09-20 2002-06-11 Lexmark International, Inc. Segmented spectrum clock generator apparatus and method for using same
EP1289150A1 (de) * 2001-08-24 2003-03-05 STMicroelectronics S.r.l. Verfahren zum Erzeugen eines Signals veränderbarer Frequenz, zum Beispiel zum Spreizen des Sprektrums eines Taktsignals, und Vorrichtung dafür
US6658043B2 (en) 2001-10-26 2003-12-02 Lexmark International, Inc. Method and apparatus for providing multiple spread spectrum clock generator circuits with overlapping output frequencies
US6501307B1 (en) 2001-11-12 2002-12-31 Pericom Semiconductor Corp. Spread-spectrum clock buffer/driver that modulates clock period by switching loads
US6847247B2 (en) * 2001-11-27 2005-01-25 Sun Microsystems, Inc. Jittery polyphase clock
US6759909B2 (en) * 2002-06-21 2004-07-06 International Business Machines Corporation RF energy dispersal in systems consisting of aggregated computing elements as subsystems
KR100910857B1 (ko) * 2002-10-29 2009-08-06 페어차일드코리아반도체 주식회사 전자기 간섭 방지 방법 및 그 장치
DE10251703B4 (de) * 2002-11-06 2005-08-04 Infineon Technologies Ag Schaltungsanordnung zur Frequenzteilung und Phasenregelschleife mit der Schaltungsanordnung
US7369148B2 (en) * 2003-03-11 2008-05-06 Canon Kabushiki Kaisha Frequency modulation apparatus and frequency modulation method
US7561652B2 (en) * 2003-04-22 2009-07-14 Paul Kevin Hall High frequency spread spectrum clock generation
DE60310373T2 (de) * 2003-04-28 2007-09-27 Accent S.P.A. Taktgenerator mit spektraler Dispersion
JP3880540B2 (ja) * 2003-05-16 2007-02-14 キヤノン株式会社 表示パネルの駆動制御装置
US7486743B2 (en) * 2003-12-29 2009-02-03 Intel Corporation Device and method of measuring frequency domain response in RF modulator
US7515646B2 (en) 2004-02-05 2009-04-07 Lexmark International, Inc. Method and apparatus for reducing EMI emissions for data signals traveling over a data pathway
US7443221B2 (en) * 2004-05-21 2008-10-28 Broadcom Corporation System and method for fully digital clock divider with non-integer divisor support
US7236059B2 (en) * 2005-06-29 2007-06-26 Intel Corporation Apparatus, system, and method for oscillator network with multiple parallel oscillator circuits
US7221704B2 (en) * 2005-08-01 2007-05-22 Marvell World Trade Ltd. All digital implementation of clock spectrum spreading (dither) for low power/die area
JP5023709B2 (ja) * 2006-04-03 2012-09-12 株式会社デンソー 通信システム及び通信装置
JP2008233304A (ja) * 2007-03-19 2008-10-02 Mitsubishi Electric Corp 画像データ処理装置
JP2008271252A (ja) 2007-04-20 2008-11-06 Toshiba Corp 無線通信装置およびシステム
US20090128213A1 (en) * 2007-11-19 2009-05-21 Broadcom Corporation Integrated circuit clock structure
US8412105B2 (en) 2007-11-26 2013-04-02 Apple Inc. Electronic devices with radio-frequency collision resolution capabilities
JP4681658B2 (ja) * 2009-01-30 2011-05-11 ザインエレクトロニクス株式会社 クロック制御回路及び送信機
US7944319B2 (en) * 2009-03-31 2011-05-17 Texas Instruments Incorporated Clock spreading systems and methods
US8884663B2 (en) * 2013-02-25 2014-11-11 Advanced Micro Devices, Inc. State machine for low-noise clocking of high frequency clock
KR20150019884A (ko) * 2013-08-16 2015-02-25 삼성전자주식회사 디스플레이 구동 회로 및 디스플레이 장치
KR102444599B1 (ko) 2017-03-24 2022-09-16 후아웨이 테크놀러지 컴퍼니 리미티드 모바일 단말기

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023116A (en) * 1976-07-08 1977-05-10 Fairchild Camera And Instrument Corporation Phase-locked loop frequency synthesizer
JPS6124321A (ja) * 1984-05-30 1986-02-03 テクトロニツクス・インコ−ポレイテツド デジタル機器の放射低減装置
US4658406A (en) * 1985-08-12 1987-04-14 Andreas Pappas Digital frequency divider or synthesizer and applications thereof
DE3802863A1 (de) * 1988-02-01 1989-08-10 Vdo Schindling Verfahren zum betrieb einer taktgesteuerten einrichtung und taktgesteuerte einrichtung
US4933890A (en) * 1989-06-13 1990-06-12 The Charles Stark Draper Laboratory, Inc. Digital frequency synthesizer
US5185711A (en) * 1989-12-08 1993-02-09 Sony Corporation Apparatus for dividing elements of a finite galois field and decoding error correction codes
US5287296A (en) * 1992-04-22 1994-02-15 At&T Bell Laboratories Clock generators having programmable fractional frequency division
US5305362A (en) * 1992-12-10 1994-04-19 Hewlett-Packard Company Spur reduction for multiple modulator based synthesis
US5305632A (en) * 1993-02-24 1994-04-26 Velcon Filters, Incorporated Method and apparatus for measuring interfacial tension of a liquid using the capillary rise method
US5426392A (en) * 1993-08-27 1995-06-20 Qualcomm Incorporated Spread clock source for reducing electromagnetic interference generated by digital circuits
US5488627A (en) * 1993-11-29 1996-01-30 Lexmark International, Inc. Spread spectrum clock generator and associated method
US5659587A (en) * 1994-11-23 1997-08-19 Tektronix, Inc. Spread spectrum phase-locked loop clock generator with VCO driven by a symmetrical voltage ramp signal
US5565816A (en) * 1995-08-18 1996-10-15 International Business Machines Corporation Clock distribution network

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008027391A1 (de) * 2008-06-09 2009-12-24 Atmel Automotive Gmbh Schaltung, Verfahren zum Empfangeneines Signals und Verwendung eines Zufallsgenerators
US7868679B2 (en) 2008-06-09 2011-01-11 Atmel Automotive Gmbh Circuit, method for receiving a signal, and use of a random event generator
DE102008027391B4 (de) * 2008-06-09 2011-05-26 Atmel Automotive Gmbh Schaltung, Verfahren zum Empfangeneines Signals und Verwendung eines Zufallsgenerators
DE102008027391B8 (de) * 2008-06-09 2011-07-28 Atmel Automotive GmbH, 74072 Schaltung, Verfahren zum Empfangen eines Signals und Verwendung eines Zufallsgenerators

Also Published As

Publication number Publication date
JP3631573B2 (ja) 2005-03-23
US5736893A (en) 1998-04-07
DE69720305D1 (de) 2003-05-08
US5909144A (en) 1999-06-01
JPH09289527A (ja) 1997-11-04
EP0786867B1 (de) 2003-04-02
EP0786867A1 (de) 1997-07-30

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: HEWLETT-PACKARD DEVELOPMENT CO., L.P., HOUSTON, TE