DE69427114D1 - Taktgenerator mit spektraler Dispersion und assoziiertes Verfahren - Google Patents

Taktgenerator mit spektraler Dispersion und assoziiertes Verfahren

Info

Publication number
DE69427114D1
DE69427114D1 DE69427114T DE69427114T DE69427114D1 DE 69427114 D1 DE69427114 D1 DE 69427114D1 DE 69427114 T DE69427114 T DE 69427114T DE 69427114 T DE69427114 T DE 69427114T DE 69427114 D1 DE69427114 D1 DE 69427114D1
Authority
DE
Germany
Prior art keywords
clock generator
associated method
spectral dispersion
spectral
dispersion
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
DE69427114T
Other languages
English (en)
Other versions
DE69427114T2 (de
Inventor
Keith B Hardin
John T Fessler
Donald Reid Bush
James Ronald Booth
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.)
Lexmark International Inc
Original Assignee
Lexmark International Inc
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 Lexmark International Inc filed Critical Lexmark International Inc
Publication of DE69427114D1 publication Critical patent/DE69427114D1/de
Application granted granted Critical
Publication of DE69427114T2 publication Critical patent/DE69427114T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/94—Generating pulses having essentially a finite slope or stepped portions having trapezoidal shape
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • H03C3/0908—Modifications of modulator for regulating the mean frequency using a phase locked loop
    • H03C3/0966—Modifications of modulator for regulating the mean frequency using a phase locked loop modulating the reference clock
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B29/00—Generation of noise currents and voltages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • H03C3/0908—Modifications of modulator for regulating the mean frequency using a phase locked loop
    • H03C3/0916—Modifications of modulator for regulating the mean frequency using a phase locked loop with frequency divider or counter in the loop
    • H03C3/0925—Modifications of modulator for regulating the mean frequency using a phase locked loop with frequency divider or counter in the loop applying frequency modulation at the divider in the feedback loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • H03C3/0908—Modifications of modulator for regulating the mean frequency using a phase locked loop
    • H03C3/0941—Modifications of modulator for regulating the mean frequency using a phase locked loop applying frequency modulation at more than one point 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
    • H03L7/08—Details of the phase-locked loop
    • H03L7/0805—Details of the phase-locked loop the loop being adapted to provide an additional control signal for use outside 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
    • H03L7/197—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 a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
    • 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
DE69427114T 1993-11-29 1994-11-29 Taktgenerator mit spektraler Dispersion und assoziiertes Verfahren Expired - Lifetime DE69427114T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/160,077 US5488627A (en) 1993-11-29 1993-11-29 Spread spectrum clock generator and associated method

Publications (2)

Publication Number Publication Date
DE69427114D1 true DE69427114D1 (de) 2001-05-23
DE69427114T2 DE69427114T2 (de) 2001-10-18

Family

ID=22575419

Family Applications (2)

Application Number Title Priority Date Filing Date
DE69427114T Expired - Lifetime DE69427114T2 (de) 1993-11-29 1994-11-29 Taktgenerator mit spektraler Dispersion und assoziiertes Verfahren
DE69434994T Expired - Lifetime DE69434994T2 (de) 1993-11-29 1994-11-29 Taktgenerator mit spektraler Dispersion und assoziertes Verfahren

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE69434994T Expired - Lifetime DE69434994T2 (de) 1993-11-29 1994-11-29 Taktgenerator mit spektraler Dispersion und assoziertes Verfahren

Country Status (7)

Country Link
US (2) US5488627A (de)
EP (2) EP0655829B1 (de)
JP (2) JPH07235862A (de)
KR (1) KR100367540B1 (de)
AU (1) AU676355B2 (de)
CA (1) CA2131567C (de)
DE (2) DE69427114T2 (de)

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EP0655829A1 (de) 1995-05-31
JP2006217642A (ja) 2006-08-17
CA2131567A1 (en) 1995-05-30
JP3997248B2 (ja) 2007-10-24
AU7282194A (en) 1995-06-15
JPH07235862A (ja) 1995-09-05
KR950016121A (ko) 1995-06-17
DE69434994D1 (de) 2007-08-09
AU676355B2 (en) 1997-03-06
DE69427114T2 (de) 2001-10-18
CA2131567C (en) 2005-06-21
US5488627A (en) 1996-01-30
DE69434994T2 (de) 2008-03-06
US5867524A (en) 1999-02-02
EP1073194A2 (de) 2001-01-31
EP0655829B1 (de) 2001-04-18
KR100367540B1 (ko) 2003-03-03
EP1073194B1 (de) 2007-06-27

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