WO2005043746A3 - Amplifier control based on load impedance and methods - Google Patents

Amplifier control based on load impedance and methods Download PDF

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Publication number
WO2005043746A3
WO2005043746A3 PCT/US2004/032415 US2004032415W WO2005043746A3 WO 2005043746 A3 WO2005043746 A3 WO 2005043746A3 US 2004032415 W US2004032415 W US 2004032415W WO 2005043746 A3 WO2005043746 A3 WO 2005043746A3
Authority
WO
WIPO (PCT)
Prior art keywords
amplifier
load impedance
during
methods
control based
Prior art date
Application number
PCT/US2004/032415
Other languages
French (fr)
Other versions
WO2005043746A2 (en
Inventor
Lazaar J Louis
Matt C Hayek
Original Assignee
Motorola Inc
Lazaar J Louis
Matt C Hayek
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola Inc, Lazaar J Louis, Matt C Hayek filed Critical Motorola Inc
Publication of WO2005043746A2 publication Critical patent/WO2005043746A2/en
Publication of WO2005043746A3 publication Critical patent/WO2005043746A3/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
    • H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
    • H03G3/3047—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers for intermittent signals, e.g. burst signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
    • H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers

Abstract

A method of operating an amplifier, for example, in a wireless radio transceiver, including monitoring a characteristic of the amplifier during an operating interval of the amplifier, for example, during a transmission burst, providing an open-loop control signal to the amplifier during a subsequent operating interval of the amplifier wherein the open-loop control signal based on the characteristic monitored during a previous operating interval. In one embodiment, the corrected control signals are stored in a look-up table (510) that is updated based on the changes in load impedance.
PCT/US2004/032415 2003-10-22 2004-10-01 Amplifier control based on load impedance and methods WO2005043746A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/691,024 US7015760B2 (en) 2003-10-22 2003-10-22 Amplifier control based on load impedance and methods
US10/691,024 2003-10-22

Publications (2)

Publication Number Publication Date
WO2005043746A2 WO2005043746A2 (en) 2005-05-12
WO2005043746A3 true WO2005043746A3 (en) 2005-06-30

Family

ID=34521781

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/032415 WO2005043746A2 (en) 2003-10-22 2004-10-01 Amplifier control based on load impedance and methods

Country Status (2)

Country Link
US (1) US7015760B2 (en)
WO (1) WO2005043746A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8831074B2 (en) * 2005-10-03 2014-09-09 Clariphy Communications, Inc. High-speed receiver architecture
ATE511098T1 (en) * 2005-12-06 2011-06-15 Harman Int Ind DIAGNOSTIC SYSTEM FOR A POWER CONVERTER
US11249124B2 (en) * 2019-07-11 2022-02-15 Essam Samir Elsahwi System and method for determining the impedance properties of a load using load analysis signals

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6008698A (en) * 1998-05-18 1999-12-28 Omnipoint Corporation Amplifier with dynamically adaptable supply current
US6756852B2 (en) * 2002-09-05 2004-06-29 Gatax Technology Co., Ltd. Method for reducing output noise of a power amplifier
US6757526B1 (en) * 1997-04-25 2004-06-29 Steven J. Sharp Battery life extending technique for mobile wireless applications using bias level control

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6362690B1 (en) * 2000-04-19 2002-03-26 Ophir Rf, Inc. System and method for closed loop VSWR correction and tuning in RF power amplifiers

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6757526B1 (en) * 1997-04-25 2004-06-29 Steven J. Sharp Battery life extending technique for mobile wireless applications using bias level control
US6008698A (en) * 1998-05-18 1999-12-28 Omnipoint Corporation Amplifier with dynamically adaptable supply current
US6756852B2 (en) * 2002-09-05 2004-06-29 Gatax Technology Co., Ltd. Method for reducing output noise of a power amplifier

Also Published As

Publication number Publication date
US7015760B2 (en) 2006-03-21
WO2005043746A2 (en) 2005-05-12
US20050088225A1 (en) 2005-04-28

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