WO2007056722A3 - Non-linear feedback control loops as spread spectrum clock generator - Google Patents

Non-linear feedback control loops as spread spectrum clock generator Download PDF

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Publication number
WO2007056722A3
WO2007056722A3 PCT/US2006/060599 US2006060599W WO2007056722A3 WO 2007056722 A3 WO2007056722 A3 WO 2007056722A3 US 2006060599 W US2006060599 W US 2006060599W WO 2007056722 A3 WO2007056722 A3 WO 2007056722A3
Authority
WO
WIPO (PCT)
Prior art keywords
clock signal
feedback control
spread spectrum
linear feedback
clock generator
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.)
Ceased
Application number
PCT/US2006/060599
Other languages
French (fr)
Other versions
WO2007056722A2 (en
Inventor
Wen T Lin
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.)
OMNISPREAD COMMUNICATIONS Inc
Original Assignee
OMNISPREAD COMMUNICATIONS 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 OMNISPREAD COMMUNICATIONS Inc filed Critical OMNISPREAD COMMUNICATIONS Inc
Priority to JP2008540320A priority Critical patent/JP2009515488A/en
Priority to EP06846240A priority patent/EP1958336A2/en
Priority to US12/092,742 priority patent/US20090135885A1/en
Publication of WO2007056722A2 publication Critical patent/WO2007056722A2/en
Anticipated expiration legal-status Critical
Publication of WO2007056722A3 publication Critical patent/WO2007056722A3/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

This patent disclosure presents circuits, systems and methods to spread a clock signal to produce a random spreading for the clock signal that offers the maximum possible power density reduction for the spurious radiations generated from the clock signal and its harmonics. These new inventions utilize a non-linear feedback control loop to assist in generation of the spread spectrum clock and result in electronic products that can pass the FCC requirements for spurious radiations generated by the clock signal and its harmonics without utilizing expensive shielding and other EMI suppression methods.
PCT/US2006/060599 2005-11-07 2006-11-07 Non-linear feedback control loops as spread spectrum clock generator Ceased WO2007056722A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2008540320A JP2009515488A (en) 2005-11-07 2006-11-07 Nonlinear feedback control loop as a spread spectrum clock generator.
EP06846240A EP1958336A2 (en) 2005-11-07 2006-11-07 Non-linear feedback control loops as spread spectrum clock generator
US12/092,742 US20090135885A1 (en) 2005-11-07 2006-11-07 Non-linear feedback control loops as spread spectrum clock generator

Applications Claiming Priority (18)

Application Number Priority Date Filing Date Title
US73422205P 2005-11-07 2005-11-07
US60/734,222 2005-11-07
US73759205P 2005-11-17 2005-11-17
US60/737,592 2005-11-17
US74276405P 2005-12-06 2005-12-06
US60/742,764 2005-12-06
US75604006P 2006-01-04 2006-01-04
US60/756,040 2006-01-04
US75764506P 2006-01-10 2006-01-10
US60/757,645 2006-01-10
US80590006P 2006-06-27 2006-06-27
US60/805,900 2006-06-27
US80663906P 2006-07-06 2006-07-06
US60/806,639 2006-07-06
US82333906P 2006-08-23 2006-08-23
US60/823,339 2006-08-23
US82728806P 2006-09-28 2006-09-28
US60/827,288 2006-09-28

Publications (2)

Publication Number Publication Date
WO2007056722A2 WO2007056722A2 (en) 2007-05-18
WO2007056722A3 true WO2007056722A3 (en) 2008-07-31

Family

ID=38024065

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/060599 Ceased WO2007056722A2 (en) 2005-11-07 2006-11-07 Non-linear feedback control loops as spread spectrum clock generator

Country Status (3)

Country Link
EP (1) EP1958336A2 (en)
JP (1) JP2009515488A (en)
WO (1) WO2007056722A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9274149B2 (en) 2012-04-16 2016-03-01 Hamilton Sundstrand Corporation Frequency phase detection three phase system
JP6202867B2 (en) * 2013-04-12 2017-09-27 三菱電機株式会社 Spread spectrum clock generator
KR102948050B1 (en) * 2023-11-10 2026-04-06 브이에스아이 주식회사 Method of spreading spectrum of data transmission clock and device for the method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5506545A (en) * 1993-11-09 1996-04-09 Gte Government Systems Corporation Electronic apparatus having low radio frequency interference from controlled excursion noise-modulated system clock signal
US5610955A (en) * 1995-11-28 1997-03-11 Microclock, Inc. Circuit for generating a spread spectrum clock
US6294936B1 (en) * 1998-09-28 2001-09-25 American Microsystems, Inc. Spread-spectrum modulation methods and circuit for clock generator phase-locked loop
US6377646B1 (en) * 1997-07-21 2002-04-23 Cypress Semiconductor Corp. Spread spectrum at phase lock loop (PLL) feedback path
US20040160280A1 (en) * 2003-02-19 2004-08-19 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Oscillator
US6850554B1 (en) * 1999-11-09 2005-02-01 Cypress Semiconductor Corp. Circuit and method for controlling a spread spectrum transition

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61253922A (en) * 1985-05-02 1986-11-11 Japan Radio Co Ltd digital phase comparator
JPH04365223A (en) * 1991-06-13 1992-12-17 Nec Corp Phase locked loop circuit
JPH1174787A (en) * 1997-08-27 1999-03-16 Sony Corp Phase locked loop circuit
ATE304241T1 (en) * 2001-05-31 2005-09-15 Koninkl Philips Electronics Nv FREQUENCY CONTROL CIRCUIT, CLOCK RECOVERY CIRCUIT AND RECEIVER
JP2005198120A (en) * 2004-01-09 2005-07-21 Yokogawa Electric Corp Jitter generator
US7167059B2 (en) * 2004-04-08 2007-01-23 Avago Technologies General Ip (Singapore) Pte. Ltd. Circuit for generating spread spectrum clock

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5506545A (en) * 1993-11-09 1996-04-09 Gte Government Systems Corporation Electronic apparatus having low radio frequency interference from controlled excursion noise-modulated system clock signal
US5610955A (en) * 1995-11-28 1997-03-11 Microclock, Inc. Circuit for generating a spread spectrum clock
US6377646B1 (en) * 1997-07-21 2002-04-23 Cypress Semiconductor Corp. Spread spectrum at phase lock loop (PLL) feedback path
US6294936B1 (en) * 1998-09-28 2001-09-25 American Microsystems, Inc. Spread-spectrum modulation methods and circuit for clock generator phase-locked loop
US6850554B1 (en) * 1999-11-09 2005-02-01 Cypress Semiconductor Corp. Circuit and method for controlling a spread spectrum transition
US20040160280A1 (en) * 2003-02-19 2004-08-19 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Oscillator

Also Published As

Publication number Publication date
EP1958336A2 (en) 2008-08-20
JP2009515488A (en) 2009-04-09
WO2007056722A2 (en) 2007-05-18

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