DE19681279T1 - Frequency-modulated clock generator for reduced radiation - Google Patents

Frequency-modulated clock generator for reduced radiation

Info

Publication number
DE19681279T1
DE19681279T1 DE19681279T DE19681279T DE19681279T1 DE 19681279 T1 DE19681279 T1 DE 19681279T1 DE 19681279 T DE19681279 T DE 19681279T DE 19681279 T DE19681279 T DE 19681279T DE 19681279 T1 DE19681279 T1 DE 19681279T1
Authority
DE
Germany
Prior art keywords
frequency
clock generator
modulated clock
reduced radiation
radiation
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.)
Granted
Application number
DE19681279T
Other languages
German (de)
Other versions
DE19681279C2 (en
Inventor
Donald Weiss
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.)
Intel Corp
Original Assignee
Intel Corp
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 Intel Corp filed Critical Intel Corp
Publication of DE19681279T1 publication Critical patent/DE19681279T1/en
Application granted granted Critical
Publication of DE19681279C2 publication Critical patent/DE19681279C2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • H03C3/095—Modifications of modulator for regulating the mean frequency using a phase locked loop applying frequency modulation to the loop in front of the voltage controlled oscillator
    • 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
    • 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 Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Transmitters (AREA)
DE19681279T 1995-03-08 1996-02-22 Microprocessor chip with an internal clock generation unit Expired - Lifetime DE19681279C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US40034295A 1995-03-08 1995-03-08
PCT/US1996/001426 WO1996027943A1 (en) 1995-03-08 1996-02-22 Frequency modulated clock for reduced radiation

Publications (2)

Publication Number Publication Date
DE19681279T1 true DE19681279T1 (en) 1998-03-19
DE19681279C2 DE19681279C2 (en) 2003-02-06

Family

ID=23583232

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19681279T Expired - Lifetime DE19681279C2 (en) 1995-03-08 1996-02-22 Microprocessor chip with an internal clock generation unit

Country Status (5)

Country Link
AU (1) AU4971096A (en)
DE (1) DE19681279C2 (en)
GB (1) GB2313935B (en)
HK (1) HK1006790A1 (en)
WO (1) WO1996027943A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5812590A (en) * 1996-02-28 1998-09-22 Motorola, Inc. Frequency spreading clock modulation
GB9614561D0 (en) * 1996-07-11 1996-09-04 4Links Ltd Communication system with improved code
GB2333883B (en) * 1998-01-28 2002-10-16 Markus Guenther Kuhn Low cost countermeasure against compromising electromagnetic computer emanations
US6937679B2 (en) * 2001-12-26 2005-08-30 Intel Corporation Spread spectrum clocking tolerant receivers
US7403054B1 (en) 2007-12-05 2008-07-22 International Business Machines Corporation Sub-picosecond multiphase clock generator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4507796A (en) * 1982-10-20 1985-03-26 Printronix, Inc. Electronic apparatus having low radio frequency interference from system clock signal
EP0163313A3 (en) * 1984-05-30 1986-10-01 Tektronix, Inc. Method and apparatus for spectral dispersion of the radiated energy from a digital system
US5263055A (en) * 1991-11-04 1993-11-16 Motorola, Inc. Apparatus and method for reducing harmonic interference generated by a clock signal
US5734041A (en) * 1995-10-20 1998-03-31 Mcgill University Preparation of chiral phosphorothioate oligomers

Also Published As

Publication number Publication date
HK1006790A1 (en) 1999-03-19
GB9717648D0 (en) 1997-10-22
DE19681279C2 (en) 2003-02-06
WO1996027943A1 (en) 1996-09-12
GB2313935A (en) 1997-12-10
AU4971096A (en) 1996-09-23
GB2313935B (en) 1999-09-29

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8607 Notification of search results after publication
8304 Grant after examination procedure
8364 No opposition during term of opposition
R071 Expiry of right