Correction de distortion pour un système amplificateur

Distortion correction for an amplifier system

Korrektur der Verzerrung für ein verstärkter System

Abstract

An amplifier system is disclosed having improved distortion reduction. This system includes a DC voltage source having AC and DC components. An input signal (12) to be amplified is supplied to an amplifier (PA) coupled to a DC voltage source (VDC) for amplifying the input signal to provide an output signal in accordance therewith. Correction signal circuitry is provided including circuitry (41) for separating the AC and DC components and varying the magnitude and phase of the AC component independently of the DC component to provide an adjusted AC component. The DC component and the adjusted AC component are summed together to provide an adjusted correction signal which is then combined with the input signal prior to application of the input signal to the amplifier.

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Patent Citations (3)

    Publication numberPublication dateAssigneeTitle
    EP-0236068-A2September 09, 1987Continental Electronics CorporationAM-RF Transmitter with compensation for power supply variations
    FR-2419610-A1October 05, 1979Cit AlcatelLow distortion transistor powered amplifier - has three, four-transistor chopper circuits fed by logic AND=gates
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NO-Patent Citations (0)

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Cited By (3)

    Publication numberPublication dateAssigneeTitle
    US-7795969-B2September 14, 2010Nxp B.V.Digital amplifier
    WO-2004091092-A1October 21, 2004Philips Intellectual Property & Standards Gmbh, Koninklijke Philips Electronics N. V.Amplificateur numerique
    WO-2006112687-A1October 26, 2006Vladimir FilevskiAmplifier with a three-phase power supply