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1. WO2009006578 - SYSTEMS AND METHODS FOR SATURATION DETECTION AND CORRECTION IN A POWER CONTROL LOOP

Publication Number WO/2009/006578
Publication Date 08.01.2009
International Application No. PCT/US2008/069166
International Filing Date 03.07.2008
IPC
H03F 3/20 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
CPC
H03F 1/52
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
52Circuit arrangements for protecting such amplifiers
H03F 2200/66
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2200Indexing scheme relating to amplifiers
66Clipping circuitry being present in an amplifier, i.e. the shape of the signal being modified
H03F 3/20
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
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
H03G 3/3047
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
3047for intermittent signals, e.g. burst signals
Applicants
  • SKYWORKS SOLUTIONS, INC [US]/[US] (AllExceptUS)
  • RIPLEY, David, S. (UsOnly)
  • PHILLIPS, Kerry, B. (UsOnly)
Inventors
  • RIPLEY, David, S.
  • PHILLIPS, Kerry, B.
Agents
  • LEVY, Carla, M.
Priority Data
60/958,59805.07.2007US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SYSTEMS AND METHODS FOR SATURATION DETECTION AND CORRECTION IN A POWER CONTROL LOOP
(FR) SYSTÈMES ET PROCÉDÉS DE DÉTECTION ET DE CORRECTION DE SATURATION DANS UNE BOUCLE DE COMMANDE DE PUISSANCE
Abstract
(EN)
Systems and methods are described for detecting and correcting saturation in a power amplification circuit. An exemplary circuit comprises a power amplifier that provides an amplified output signal based upon an input signal and a gain control signal; a power detector that provides a detector signal indicative of the amplified signal magnitude; an error amplifier that generates the gain control signal based upon a setpoint signal and the detector signal; and a saturation detector that provides a saturation detection signal indicating whether gain control signal exceeds a reference signal. In another embodiment the circuit comprises an offset generator that provides a correction to the setpoint signal in response to the saturation detection signal indicating that the gain control signal exceeds the reference signal. In still another embodiment the circuit includes an offset cutoff circuit that freezes the correction to the setpoint signal in response to the correction exceeding a threshold.
(FR)
Systèmes et procédés de détection et de correction de saturation dans un circuit d'amplification de puissance. Un circuit décrit à titre d'exemple comprend: un amplificateur de puissance fournissant un signal de sortie amplifié et un signal de commande de gain; un détecteur de puissance fournissant un signal de détection correspondant à la magnitude du signal amplifié; un amplificateur d'erreur générant le signal de commande de gain en fonction d'un signal de point de calage et le signal de détection; et un détecteur de saturation fournissant un signal de détection de saturation qui indique si le signal de commande de gain dépasse un signal de référence. Dans un autre mode de réalisation, le circuit comprend un générateur de décalage qui apporte une correction au signal de point de référence en réponse au signal de détection de saturation indiquant que le signal de commande de gain dépasse le signal de référence. Dans un autre mode de réalisation encore, le circuit inclut un circuit de coupure de décalage qui bloque la correction apportée au signal de point de calage en réponse à une correction supérieur à un seuil.
Also published as
EP2008772403
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