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1. WO2000042710 - HIGH PERFORMANCE SHORT-WAVE BROADCASTING TRANSMITTER OPTIMISED FOR DIGITAL BROADCASTING

Publication Number WO/2000/042710
Publication Date 20.07.2000
International Application No. PCT/FR2000/000009
International Filing Date 05.01.2000
Chapter 2 Demand Filed 21.07.2000
IPC
H03F 1/32 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
32Modifications of amplifiers to reduce non-linear distortion
H03F 1/33 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
32Modifications of amplifiers to reduce non-linear distortion
33in discharge-tube amplifiers
H03F 3/24 2006.01
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
24of transmitter output stages
H04B 1/04 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/-H04B13/123; Details of transmission systems not characterised by the medium used for transmission
02Transmitters
04Circuits
CPC
H03F 1/3247
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
32Modifications of amplifiers to reduce non-linear distortion
3241using predistortion circuits
3247using feedback acting on predistortion circuits
H03F 1/33
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
32Modifications of amplifiers to reduce non-linear distortion
33in discharge-tube amplifiers
H03F 3/24
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
24of transmitter output stages
H04B 2001/0408
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
02Transmitters
04Circuits
0408with power amplifiers
Applicants
  • THOMSON-CSF [FR/FR]; 173, boulevard Haussmann F-75008 Paris, FR (AllExceptUS)
  • LAURENT, Pierre, André [FR/FR]; FR (UsOnly)
Inventors
  • LAURENT, Pierre, André; FR
Agents
  • LINCOT, Georges ; Thomson-CSF Propriete Intellectuelle Dept. Brevets 13, avenue du Président Salvador Allende F-94117 Arcueil Cedex, FR
  • CHAVERNEFF, Vladimir; Thomson-CSF Propriété Intellectuelle Dépt. Brevets 13, avenue du Président Salvador Allende F-94117 Arcueil Cedex, FR
Priority Data
99/0024012.01.1999FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) HIGH PERFORMANCE SHORT-WAVE BROADCASTING TRANSMITTER OPTIMISED FOR DIGITAL BROADCASTING
(FR) EMETTEUR DE RADIODIFFUSION EN ONDES COURTES A HAUT RENDEMENT OPTIMISE POUR LES EMISSIONS DE TYPE NUMERIQUE
Abstract
(EN)
The invention concerns a transmitter comprising a power tube (1) whereof the gate is excited by a variable phase signal through an energizer (2) and whereof the anode is amplitude modulated by a modulator (3) output signal. The phase and amplitudes of the signals respectively applied on the tube (1) gate and anode are representative of the phase and amplitude of the complex signal to be transmitted. In order that the amplifying characteristic of the transmitter in its entirety remains linear independently of the amplitude of the signal to be transmitted, the energizer (2) has a linear amplifying characteristic for low amplitude levels of the signal to be transmitted and operates in saturated mode when the amplitude of the signal to be transmitted exceeds a predetermined threshold. The invention is applicable to short-wave transmitters.
(FR)
L'émetteur comprend un tube de puissance (1) dont la grille est excitée par un signal de phase variable au travers d'un dispositif d'excitation (2) et dont l'anode est modulée en amplitude par le signal de sortie d'un modulateur (3). La phase et l'amplitude des signaux appliqués respectivement sur la grille et l'anode du tube (1) son représentatifs de la phase et de l'amplitude du signal complexe à transmettre. Pour que la caractéristique d'amplification de l'émetteur dans son ensemble reste linéaire indépendamment de l'amplitude du signal à transmettre le dispositif d'excitation (2) présente une caractéristique d'amplification linéaire pour les faibles amplitudes du signal à transmettre et travaille en régime saturé lorsque l'amplitude du signal à transmettre dépasse une valeur de seuil déterminée. Applications: Emetteurs ondes courtes.
Also published as
HRP20010523A
Latest bibliographic data on file with the International Bureau