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1. WO2006039290 - SPREAD FREQUENCY SPECTRUM WAVEFORM GENERATING CIRCUIT

Publication Number WO/2006/039290
Publication Date 13.04.2006
International Application No. PCT/US2005/034670
International Filing Date 29.09.2005
IPC
H03K 7/08 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
7Modulating pulses with a continuously-variable modulating signal
08Duration or width modulation
H03K 9/08 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
9Demodulating pulses which have been modulated with a continuously-variable signal
08of duration- or width-modulated pulses
H04J 9/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
9Multiplex systems in which each channel is represented by a different type of modulation of the carrier
H04L 5/04 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
5Arrangements affording multiple use of the transmission path
02Channels characterised by the type of signal
04the signals being represented by different amplitudes or polarities, e.g. quadriplex
H03K 5/22 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
5Manipulation of pulses not covered by one of the other main groups of this subclass
22Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
G01R 29/02 2006.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
29Arrangements for measuring or indicating electric quantities not covered by groups G01R19/-G01R27/135
02Measuring characteristics of individual pulses, e.g. deviation from pulse flatness, rise time or duration
CPC
H03F 3/217
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
20Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
21with semiconductor devices only
217Class D power amplifiers; Switching amplifiers
H03K 7/08
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
7Modulating pulses with a continuously-variable modulating signal
08Duration or width modulation ; Duty cycle modulation
H04B 15/02
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
15Suppression or limitation of noise or interference
02Reducing interference from electric apparatus by means located at or near the interfering apparatus
H04B 2215/067
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
2215Reducing interference at the transmission system level
064Reduction of clock or synthesizer reference frequency harmonics
067by modulation dispersion
Applicants
  • TEXAS INSTRUMENTS INCORPORATED [US]/[US] (AllExceptUS)
  • YASUDA, Akira [JP]/[JP] (UsOnly)
  • KIMURA, Takashi [JP]/[JP] (UsOnly)
Inventors
  • YASUDA, Akira
  • KIMURA, Takashi
Agents
  • FRANZ, Warren, L.
Priority Data
2004-28390929.09.2004JP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SPREAD FREQUENCY SPECTRUM WAVEFORM GENERATING CIRCUIT
(FR) CIRCUIT DE GENERATION DE FORME D'ONDE A ETALEMENT DE SPECTRE DE FREQUENCES
Abstract
(EN)
A circuit for generating a spread frequency spectrum waveform with shaped frequency spectrum distribution. A waveform generator has a spread spectrum waveform generating circuit (1) that generates a waveform with a spread spectrum and a frequency spectrum distribution shaping circuit (2) that shapes the frequency spectrum distribution of the spread spectrum waveform. In one embodiment, distribution shaping circuit (2) shapes the spread spectrum waveform to give a frequency spectrum distribution having a reduced spectrum part in at least one band. Also, in one embodiment, the frequency of the spread spectrum waveform can vary periodically or non periodically.
(FR)
L'invention concerne un circuit servant à générer une forme d'onde à étalement de spectre de fréquences présentant une distribution de spectre de fréquences mise en forme. Un générateur de forme d'onde comprend un circuit de génération de forme d'onde à étalement de spectre (1) qui génère une forme d'onde présentant un étalement de spectre, et un circuit de mise en forme de distribution de spectre de fréquences (2) qui met en forme la distribution du spectre de fréquences de la forme d'onde à étalement de spectre. Dans un mode de réalisation, le circuit de mise en forme de distribution (2) met en forme la forme d'onde à étalement de spectre, de sorte à fournir une distribution de spectre de fréquences présentant une partie à spectre réduit dans au moins une bande. Dans un autre mode de réalisation, la fréquence de la forme d'onde à étalement de spectre peut varier périodiquement ou non périodiquement.
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