GB2387980B - Attenuation of electro magnetic interference radiation from pulsed square wave signals - Google Patents

Attenuation of electro magnetic interference radiation from pulsed square wave signals

Info

Publication number
GB2387980B
GB2387980B GB0209518A GB0209518A GB2387980B GB 2387980 B GB2387980 B GB 2387980B GB 0209518 A GB0209518 A GB 0209518A GB 0209518 A GB0209518 A GB 0209518A GB 2387980 B GB2387980 B GB 2387980B
Authority
GB
United Kingdom
Prior art keywords
attenuation
square wave
wave signals
magnetic interference
electro magnetic
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 - Fee Related
Application number
GB0209518A
Other versions
GB0209518D0 (en
GB2387980A (en
Inventor
Nicholas Craig Bowdler
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.)
NEC Technologies UK Ltd
Original Assignee
NEC Technologies UK Ltd
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 NEC Technologies UK Ltd filed Critical NEC Technologies UK Ltd
Priority to GB0209518A priority Critical patent/GB2387980B/en
Publication of GB0209518D0 publication Critical patent/GB0209518D0/en
Publication of GB2387980A publication Critical patent/GB2387980A/en
Application granted granted Critical
Publication of GB2387980B publication Critical patent/GB2387980B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • H04B15/04—Reducing interference from electric apparatus by means located at or near the interfering apparatus the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder
    • 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)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Nonlinear Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Manipulation Of Pulses (AREA)
GB0209518A 2002-04-25 2002-04-25 Attenuation of electro magnetic interference radiation from pulsed square wave signals Expired - Fee Related GB2387980B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0209518A GB2387980B (en) 2002-04-25 2002-04-25 Attenuation of electro magnetic interference radiation from pulsed square wave signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0209518A GB2387980B (en) 2002-04-25 2002-04-25 Attenuation of electro magnetic interference radiation from pulsed square wave signals

Publications (3)

Publication Number Publication Date
GB0209518D0 GB0209518D0 (en) 2002-06-05
GB2387980A GB2387980A (en) 2003-10-29
GB2387980B true GB2387980B (en) 2005-08-10

Family

ID=9935524

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0209518A Expired - Fee Related GB2387980B (en) 2002-04-25 2002-04-25 Attenuation of electro magnetic interference radiation from pulsed square wave signals

Country Status (1)

Country Link
GB (1) GB2387980B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0163313A2 (en) * 1984-05-30 1985-12-04 Tektronix, Inc. Method and apparatus for spectral dispersion of the radiated energy from a digital system
GB2326036A (en) * 1997-06-07 1998-12-09 Motorola Ltd A pulse-width-modulated clock generator producing reduced EMI
US5886586A (en) * 1996-09-06 1999-03-23 The Regents Of The University Of California General constant frequency pulse-width modulators
US5901176A (en) * 1997-04-29 1999-05-04 Hewlett-Packard Company Delta-sigma pulse width modulator control circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0163313A2 (en) * 1984-05-30 1985-12-04 Tektronix, Inc. Method and apparatus for spectral dispersion of the radiated energy from a digital system
US5886586A (en) * 1996-09-06 1999-03-23 The Regents Of The University Of California General constant frequency pulse-width modulators
US5901176A (en) * 1997-04-29 1999-05-04 Hewlett-Packard Company Delta-sigma pulse width modulator control circuit
GB2326036A (en) * 1997-06-07 1998-12-09 Motorola Ltd A pulse-width-modulated clock generator producing reduced EMI

Also Published As

Publication number Publication date
GB0209518D0 (en) 2002-06-05
GB2387980A (en) 2003-10-29

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20080425