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1. WO2002019545 - SYSTEM FOR CLOSED LOOP POWER CONTROL USING A LINEAR OR A NON-LINEAR POWER AMPLIFIER

Publication Number WO/2002/019545
Publication Date 07.03.2002
International Application No. PCT/US2001/025846
International Filing Date 17.08.2001
Chapter 2 Demand Filed 28.03.2002
IPC
H03F 1/02 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
02Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
H03G 3/30 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
GCONTROL OF AMPLIFICATION
3Gain control in amplifiers or frequency changers
20Automatic control
30in amplifiers having semiconductor devices
H04B 7/005 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
005Control of transmission; Equalising
CPC
H03F 1/02
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
02Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
H03F 2200/294
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2200Indexing scheme relating to amplifiers
294the amplifier being a low noise amplifier [LNA]
H03F 2200/372
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2200Indexing scheme relating to amplifiers
372Noise reduction and elimination in amplifier
H03G 3/3042
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
GCONTROL OF AMPLIFICATION
3Gain control in amplifiers or frequency changers ; without distortion of the input signal
20Automatic control
30in amplifiers having semiconductor devices
3036in high-frequency amplifiers or in frequency-changers
3042in modulators, frequency-changers, transmitters or power amplifiers
H04B 1/04
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
H04W 52/52
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
52Power management, e.g. TPC [Transmission Power Control], power saving or power classes
04TPC
52using AGC [Automatic Gain Control] circuits or amplifiers
Applicants
  • CONEXANT SYSTEMS, INC. [US]/[US]
Inventors
  • DAMGAARD, Morten
  • ROZENBLIT, Dmitriy
  • DOMINO, William, J.
  • CLARK, Ricke, W.
Agents
  • HORSTEMEYER, Scott, A.
Priority Data
09/650,98730.08.2000US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SYSTEM FOR CLOSED LOOP POWER CONTROL USING A LINEAR OR A NON-LINEAR POWER AMPLIFIER
(FR) SYSTEME POUR LA REGULATION DE PUISSANCE D'UNE BOUCLE FERMEE A L'AIDE D'UN AMPLIFICATEUR DE PUISSANCE LINEAIRE OU NON LINEAIRE
Abstract
(EN)
A system for a closed power control feedback loop (200) allows for the use of a non-linear amplifier for amplifying a phase modulated (PM) signal while introducing an inverse version of the desired amplitude modulation (AM) signal into the feedback loop using a variable gain element (Fig. 2, block 212). By introducing an inverse version of the desired (AM) portion of the signal into the power control feedback loop, the non-linear, and highly efficient, power amplifier may be used to amplify only the (PM) portion of the signal, while the (AM) portion is introduced by the power control feedback loop (200). In another aspect of the invention, an inverse version of the (AM) portion of the desired transmit signal is introduced into the power control feedback loop of an amplifier that is amplifying both a phase modulated signal and an amplitude modulated signal. By introducing an inverse version of the desired (AM) signal into the power control feedback loop, the power control feedback loop may not cancel the (AM) component present at the output of the power amplifier. In yet another aspect of the invention, the desired (AM) signal is injected into the feedback loop with the power control reference signal.
(FR)
L'invention concerne un système pour une boucle de rétroaction de régulation de puissance fermée, qui permet l'utilisation d'un amplificateur non linéaire pour amplifier un signal à modulation de phase (PM) alors qu'est introduite une version inverse du signal à modulation d'amplitude (AM) désiré dans la boucle de rétroaction au moyen d'un élément de gain variable. Par introduction d'une version inverse de la partie AM désirée du signal dans la boucle de rétroaction de régulation de puissance, l'amplificateur de puissance non linéaire hautement efficace peut être utilisé pour amplifier uniquement la partie PM du signal, alors que la partie AM est introduite par la boucle de rétroaction de régulation de puissance. Dans un autre aspect de cette invention, une version inverse de la partie AM du signal de transmission désiré est introduite dans la boucle de rétroaction de régulation de puissance d'un amplificateur qui amplifie à la fois un signal à modulation de phase et un signal à modulation d'amplitude. Par introduction d'une version inverse du signal AM désiré dans la boucle de rétroaction de régulation de puissance, cette boucle de rétroaction de régulation de puissance peut ne pas annuler le constituant AM présent à la sortie de l'amplificateur de puissance. Dans un autre aspect de l'invention encore, le signal AM désiré est injecté dans la boucle de rétroaction avec le signal de référence de régulation de puissance.
Latest bibliographic data on file with the International Bureau