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1. WO2010011459 - METHOD AND APPARATUS FOR REDUCING PEAK CURRENT VARIATION IN A RADIO

Publication Number WO/2010/011459
Publication Date 28.01.2010
International Application No. PCT/US2009/048432
International Filing Date 24.06.2009
IPC
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
H03L 7/08 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
LAUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
7Automatic control of frequency or phase; Synchronisation
06using a reference signal applied to a frequency- or phase-locked loop
08Details of the phase-locked loop
CPC
H03F 1/34
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
34Negative-feedback-circuit arrangements with or without positive feedback
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 1/0466
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
0466Fault detection or indication
H04B 2001/0433
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
0433with linearisation using feedback
Applicants
  • MOTOROLA, INC. [US]/[US] (AllExceptUS)
  • NG, Chin, Wun [MY]/[MY] (UsOnly)
  • YEOH, Chen, Kok [MY]/[MY] (UsOnly)
Inventors
  • NG, Chin, Wun
  • YEOH, Chen, Kok
Agents
  • DOUTRE, Barbara, R.
Priority Data
12/179,89525.07.2008US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR REDUCING PEAK CURRENT VARIATION IN A RADIO
(FR) PROCÉDÉ ET APPAREIL DE RÉDUCTION DE VARIATION DU COURANT DE CRÊTE DANS UNE RADIO
Abstract
(EN)
The application discloses a method and apparatus for reducing peak current variation in a radio. The method includes monitoring (202) output power of a power amplifier (106) and determining (204) that the output power of the power amplifier is above a predefined threshold. The method then includes controlling (206) input power of the power amplifier (106) so that the output power is reduced below the predefined threshold. The method further includes isolating the power amplifier (106) from receiving signals reflected from an antenna (112) such that the output power is maintained below the predefined threshold. The method then includes effecting (208) amplification of a radio frequency signal at the maintained output power in the linear region of operation such that the radio frequency signal is amplified with reduced peak current variation.
(FR)
L'invention porte sur un procédé et un appareil de réduction de variation du courant de crête dans une radio. Le procédé comprend la surveillance (202) de la puissance de sortie d'un amplificateur de puissance (106) et la détermination (204) du fait que la puissance de sortie de l'amplificateur de puissance est supérieure à un seuil prédéfini. Le procédé comprend ensuite la commande (206) de la puissance d'entrée de l'amplificateur de puissance (106) de telle manière que la puissance de sortie est réduite au-dessous du seuil prédéfini. Le procédé comprend en outre l'isolation de l'amplificateur de puissance (106) contre la réception de signaux réfléchis provenant d'une antenne (112) de telle manière que la puissance de sortie est maintenue au-dessous du seuil prédéfini. Le procédé comprend ensuite la réalisation (208) d'une amplification d'un signal radiofréquence à la puissance de sortie maintenue dans la région de fonctionnement linéaire de telle manière que le signal radiofréquence est amplifié avec une variation de courant de crête réduite.
Also published as
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