CA2160750A1 - Method and Apparatus for Increasing Amplifier Efficiency - Google Patents

Method and Apparatus for Increasing Amplifier Efficiency

Info

Publication number
CA2160750A1
CA2160750A1 CA2160750A CA2160750A CA2160750A1 CA 2160750 A1 CA2160750 A1 CA 2160750A1 CA 2160750 A CA2160750 A CA 2160750A CA 2160750 A CA2160750 A CA 2160750A CA 2160750 A1 CA2160750 A1 CA 2160750A1
Authority
CA
Canada
Prior art keywords
circuitry
amplifying
produced
amplifying circuitry
signal
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA2160750A
Other languages
French (fr)
Other versions
CA2160750C (en
Inventor
William P. Alberth, Jr.
John J. Janssen
Armin Klomsdorf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 filed Critical Motorola Inc
Publication of CA2160750A1 publication Critical patent/CA2160750A1/en
Application granted granted Critical
Publication of CA2160750C publication Critical patent/CA2160750C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • H03G3/007—Control dependent on the supply voltage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
    • H03F1/0216—Continuous control
    • H03F1/0233—Continuous control by using a signal derived from the output signal, e.g. bootstrapping the voltage supply

Abstract

A transmitter (107) includes amplifying circuitry (203) and control circuitry (215, 217, 219) for biasing the amplifying circuitry (203) so that it operates closer to saturation with increased efficiency.
The gate voltage signal (213), which provides a gate bias, is coupled to the amplifying circuitry (203) and is dynamically varied by the processor circuitry (219) in response to the value of the amplifier control voltage (211) coupled to the amplifying circuitry (203). The amplifier control voltage (211), which has a value for maintaining the output power of the amplifying circuitry (203) at a constant, is produced by the integrating circuitry (217) in response to a comparison of the detected power output signal (216) produced by the detecting circuitry (215) and the power output control signal (218) produced by the processor circuitry (219). Efficiency is realized by dynamically varying the gate voltage signal (213) to its largest magnitude so that the amplifying circuitry (203) may operate as close to saturation as possible while still maintaining a constant output power.
CA002160750A 1994-11-01 1995-10-17 Method and apparatus for increasing amplifier efficiency Expired - Fee Related CA2160750C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/332,968 1994-11-01
US08/332,968 US5589796A (en) 1994-11-01 1994-11-01 Method and apparatus for increasing amplifier efficiency

Publications (2)

Publication Number Publication Date
CA2160750A1 true CA2160750A1 (en) 1996-05-02
CA2160750C CA2160750C (en) 1999-04-20

Family

ID=23300669

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002160750A Expired - Fee Related CA2160750C (en) 1994-11-01 1995-10-17 Method and apparatus for increasing amplifier efficiency

Country Status (9)

Country Link
US (1) US5589796A (en)
JP (1) JPH08316743A (en)
CN (1) CN1074609C (en)
BR (1) BR9505070A (en)
CA (1) CA2160750C (en)
FR (1) FR2726410B1 (en)
GB (1) GB2294833B (en)
IT (1) IT1280698B1 (en)
MX (1) MX9504610A (en)

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Also Published As

Publication number Publication date
IT1280698B1 (en) 1998-01-30
FR2726410B1 (en) 1998-01-30
ITRM950714A1 (en) 1997-04-30
JPH08316743A (en) 1996-11-29
ITRM950714A0 (en) 1995-10-30
GB2294833B (en) 1999-07-21
CN1074609C (en) 2001-11-07
CN1128916A (en) 1996-08-14
CA2160750C (en) 1999-04-20
US5589796A (en) 1996-12-31
FR2726410A1 (en) 1996-05-03
GB2294833A (en) 1996-05-08
GB9522038D0 (en) 1996-01-03
MX9504610A (en) 1997-05-31
BR9505070A (en) 1997-10-14

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