GB2481755B - Envelope modulator - Google Patents

Envelope modulator

Info

Publication number
GB2481755B
GB2481755B GB201117792A GB201117792A GB2481755B GB 2481755 B GB2481755 B GB 2481755B GB 201117792 A GB201117792 A GB 201117792A GB 201117792 A GB201117792 A GB 201117792A GB 2481755 B GB2481755 B GB 2481755B
Authority
GB
United Kingdom
Prior art keywords
envelope modulator
modulator
envelope
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.)
Expired - Fee Related
Application number
GB201117792A
Other versions
GB201117792D0 (en
GB2481755A (en
Inventor
Kevin Morris
Paul Warr
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.)
Asahi Kasei Microdevices Corp
Original Assignee
Asahi Kasei EMD Corp
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 Asahi Kasei EMD Corp filed Critical Asahi Kasei EMD Corp
Priority to GB201117792A priority Critical patent/GB2481755B/en
Publication of GB201117792D0 publication Critical patent/GB201117792D0/en
Publication of GB2481755A publication Critical patent/GB2481755A/en
Application granted granted Critical
Publication of GB2481755B publication Critical patent/GB2481755B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • 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
    • H03F1/0222—Continuous control by using a signal derived from the input signal
    • H03F1/0227—Continuous control by using a signal derived from the input signal using supply converters
    • 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
    • H03F1/0244—Stepped control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/217—Class D power amplifiers; Switching amplifiers
    • H03F3/2171—Class D power amplifiers; Switching amplifiers with field-effect devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/217—Class D power amplifiers; Switching amplifiers
    • H03F3/2173—Class D power amplifiers; Switching amplifiers of the bridge type
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/102—A non-specified detector of a signal envelope being used in an amplifying circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/351—Pulse width modulation being used in an amplifying circuit
GB201117792A 2006-08-08 2006-08-08 Envelope modulator Expired - Fee Related GB2481755B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB201117792A GB2481755B (en) 2006-08-08 2006-08-08 Envelope modulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB201117792A GB2481755B (en) 2006-08-08 2006-08-08 Envelope modulator

Publications (3)

Publication Number Publication Date
GB201117792D0 GB201117792D0 (en) 2011-11-30
GB2481755A GB2481755A (en) 2012-01-04
GB2481755B true GB2481755B (en) 2012-02-29

Family

ID=45218134

Family Applications (1)

Application Number Title Priority Date Filing Date
GB201117792A Expired - Fee Related GB2481755B (en) 2006-08-08 2006-08-08 Envelope modulator

Country Status (1)

Country Link
GB (1) GB2481755B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5170132A (en) * 1990-09-14 1992-12-08 Sextant Avionique Chopper amplifier circuit for the supply of a current proportional to a voltage
US5905407A (en) * 1997-07-30 1999-05-18 Motorola, Inc. High efficiency power amplifier using combined linear and switching techniques with novel feedback system
US6300826B1 (en) * 2000-05-05 2001-10-09 Ericsson Telefon Ab L M Apparatus and method for efficiently amplifying wideband envelope signals
US6661210B2 (en) * 2002-01-23 2003-12-09 Telfonaktiebolaget L.M. Ericsson Apparatus and method for DC-to-DC power conversion
US6937095B2 (en) * 2003-02-19 2005-08-30 Adtran, Inc. Efficient, switched linear signal driver
US7058373B2 (en) * 2003-09-16 2006-06-06 Nokia Corporation Hybrid switched mode/linear power amplifier power supply for use in polar transmitter
WO2006111891A1 (en) * 2005-04-20 2006-10-26 Nxp B.V. A power supply system.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5170132A (en) * 1990-09-14 1992-12-08 Sextant Avionique Chopper amplifier circuit for the supply of a current proportional to a voltage
US5905407A (en) * 1997-07-30 1999-05-18 Motorola, Inc. High efficiency power amplifier using combined linear and switching techniques with novel feedback system
US6300826B1 (en) * 2000-05-05 2001-10-09 Ericsson Telefon Ab L M Apparatus and method for efficiently amplifying wideband envelope signals
US6661210B2 (en) * 2002-01-23 2003-12-09 Telfonaktiebolaget L.M. Ericsson Apparatus and method for DC-to-DC power conversion
US6937095B2 (en) * 2003-02-19 2005-08-30 Adtran, Inc. Efficient, switched linear signal driver
US7058373B2 (en) * 2003-09-16 2006-06-06 Nokia Corporation Hybrid switched mode/linear power amplifier power supply for use in polar transmitter
WO2006111891A1 (en) * 2005-04-20 2006-10-26 Nxp B.V. A power supply system.

Also Published As

Publication number Publication date
GB201117792D0 (en) 2011-11-30
GB2481755A (en) 2012-01-04

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20190808