WO2008105073A1 - Transmitter - Google Patents

Transmitter Download PDF

Info

Publication number
WO2008105073A1
WO2008105073A1 PCT/JP2007/053649 JP2007053649W WO2008105073A1 WO 2008105073 A1 WO2008105073 A1 WO 2008105073A1 JP 2007053649 W JP2007053649 W JP 2007053649W WO 2008105073 A1 WO2008105073 A1 WO 2008105073A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
envelope signal
envelope
pulse width
amplifier
Prior art date
Application number
PCT/JP2007/053649
Other languages
French (fr)
Japanese (ja)
Inventor
Hitomaro Tougou
Shinji Ookawa
Tsutomu Hibino
Shiro Masumoto
Original Assignee
Panasonic Corporation
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 Panasonic Corporation filed Critical Panasonic Corporation
Priority to PCT/JP2007/053649 priority Critical patent/WO2008105073A1/en
Publication of WO2008105073A1 publication Critical patent/WO2008105073A1/en

Links

Classifications

    • 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
    • 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
    • H03F1/025—Stepped control by using a signal derived from the input signal
    • 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
    • H03F2200/432—Two or more amplifiers of different type are coupled in parallel at the input or output, e.g. a class D and a linear amplifier, a class B and a class A amplifier

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

A transmitter capable of supplying a power supply voltage based on an envelope signal of a transmission signal to the power supply terminal of a power amplifier and amplifying even a wide dynamic range signal with high efficiency and low distortion by means of the power amplifier. The transmitter has a level separator for separating the envelope signal into a signal in a first envelope signal section not more than a reference level and a signal in a second envelope signal section not less than the reference level according to the signal level of the envelope signal, a pulse width modulator for performing the pulse width modulation of the envelope signal in the first envelope signal section, an amplifier for linearly amplifying the envelope signal in the second envelope signal section, a transistor for performing a switching operation according to a pulse width modulation signal to amplify the pulse width modulation signal, and a smoothing circuit for smoothing the combined signal of an output signal of the amplifier and an output signal of the transistor or an output signal of the transistor before the combination, which is supplied to the power supply terminal of the power amplifier.
PCT/JP2007/053649 2007-02-27 2007-02-27 Transmitter WO2008105073A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/053649 WO2008105073A1 (en) 2007-02-27 2007-02-27 Transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/053649 WO2008105073A1 (en) 2007-02-27 2007-02-27 Transmitter

Publications (1)

Publication Number Publication Date
WO2008105073A1 true WO2008105073A1 (en) 2008-09-04

Family

ID=39720919

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/053649 WO2008105073A1 (en) 2007-02-27 2007-02-27 Transmitter

Country Status (1)

Country Link
WO (1) WO2008105073A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010089971A1 (en) * 2009-02-05 2010-08-12 日本電気株式会社 Power amplifier and power amplification method
WO2011013420A1 (en) * 2009-07-31 2011-02-03 日本電気株式会社 Power amplifying device, power amplifying method and storage medium
JP2011249892A (en) * 2010-05-24 2011-12-08 Mitsubishi Electric Corp Bias control amplifier
GB2482738A (en) * 2010-08-13 2012-02-15 Nujira Ltd Envelope tracked power supply
JP5287999B2 (en) * 2009-11-17 2013-09-11 日本電気株式会社 Amplification equipment
EP2704319A1 (en) * 2012-08-28 2014-03-05 Samsung Electronics Co., Ltd Audio device and output method thereof
JP2016505230A (en) * 2013-02-01 2016-02-18 スナップトラック・インコーポレーテッド Improved efficiency of the linear amplifier of the envelope tracking modulator
EP4156511A4 (en) * 2020-06-24 2024-05-29 ZTE Corporation Envelope amplifier, envelope tracking power amplifier, and signal processing method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000049542A (en) * 1998-07-31 2000-02-18 Roland Corp Amplifier circuit
JP2003500873A (en) * 1999-05-17 2003-01-07 エリクソン インコーポレイテッド Power modulator and method for separately amplifying high and low frequency parts of amplitude waveform
JP2005020696A (en) * 2003-06-24 2005-01-20 Northrop Grumman Corp Multi-mode amplification system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000049542A (en) * 1998-07-31 2000-02-18 Roland Corp Amplifier circuit
JP2003500873A (en) * 1999-05-17 2003-01-07 エリクソン インコーポレイテッド Power modulator and method for separately amplifying high and low frequency parts of amplitude waveform
JP2005020696A (en) * 2003-06-24 2005-01-20 Northrop Grumman Corp Multi-mode amplification system

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110279180A1 (en) * 2009-02-05 2011-11-17 Nec Corporation Power amplifier and power amplifying method
WO2010089971A1 (en) * 2009-02-05 2010-08-12 日本電気株式会社 Power amplifier and power amplification method
US8620240B2 (en) 2009-02-05 2013-12-31 Nec Corporation Power amplifier and power amplifying method
CN102308474B (en) * 2009-02-05 2015-08-26 日本电气株式会社 Power amplifier and power-magnifying method
JP5516423B2 (en) * 2009-02-05 2014-06-11 日本電気株式会社 Power amplifier and power amplification method
JP5533870B2 (en) * 2009-07-31 2014-06-25 日本電気株式会社 Power amplification apparatus and method
WO2011013420A1 (en) * 2009-07-31 2011-02-03 日本電気株式会社 Power amplifying device, power amplifying method and storage medium
US8594589B2 (en) 2009-07-31 2013-11-26 Nec Corporation Power amplifier, power amplification method, and storage medium
JP5287999B2 (en) * 2009-11-17 2013-09-11 日本電気株式会社 Amplification equipment
JP2011249892A (en) * 2010-05-24 2011-12-08 Mitsubishi Electric Corp Bias control amplifier
GB2482738A (en) * 2010-08-13 2012-02-15 Nujira Ltd Envelope tracked power supply
GB2482738B (en) * 2010-08-13 2015-05-13 Nujira Ltd Switch mode power supply for envelope tracking
US9391510B2 (en) 2010-08-13 2016-07-12 Snaptrack, Inc. Switch mode power supply for envelope tracking
EP2704319A1 (en) * 2012-08-28 2014-03-05 Samsung Electronics Co., Ltd Audio device and output method thereof
US9484876B2 (en) 2012-08-28 2016-11-01 Samsung Electronics Co., Ltd. Control of a switched mode power supply and linear power supply for an audio device
JP2016505230A (en) * 2013-02-01 2016-02-18 スナップトラック・インコーポレーテッド Improved efficiency of the linear amplifier of the envelope tracking modulator
EP4156511A4 (en) * 2020-06-24 2024-05-29 ZTE Corporation Envelope amplifier, envelope tracking power amplifier, and signal processing method

Similar Documents

Publication Publication Date Title
WO2008105073A1 (en) Transmitter
WO2007123792A3 (en) Switching power amplifier
WO2010008226A3 (en) Switching power amplifier and method of controlling the same
WO2008112041A3 (en) Power supply providing ultrafast modulation of output voltage
TW200518535A (en) High performance modulator architecture for the outphasing rf amplifier
WO2009060652A1 (en) Power amplifier and radio wave transmitter having the same
WO2006062831A3 (en) Voltage clamp for improved transient performance of a collector voltage controlled power amplifier
WO2008090721A1 (en) Power amplifier
WO2009082582A3 (en) Method and apparatus for direct digital to radio frequency conversion
WO2011031379A3 (en) Boosted-rail amplifier
KR101800726B1 (en) Apparatus and method for improving efficiency in power amplifier
GB2442924A (en) A method and apparatus for increasing the efficiency of low power amplifiers
WO2008088025A1 (en) Amplification circuit and radio communication device
ATE525801T1 (en) CIRCUIT COMPRISING A POWER AMPLIFIER AND AMPLIFICATION METHOD
WO2009004733A1 (en) Mimo transmitter
HK1099417A1 (en) A power multiplier system and method
WO2009123568A8 (en) High efficiency linear transmitter
WO2015145097A1 (en) Amplifier circuitry for envelope modulators, envelope modulators incorporating said amplifier circuitry and method of modulating a signal envelope
CN103477555B (en) The doherty amplifier of efficiency optimization
JP2009206675A (en) Power amplifier
TW200627791A (en) Power amplifier circuit and method thereof
TW200740111A (en) Low distortion class-D amplifier and audio system thereof
WO2009041097A1 (en) Power amplifier circuit, and transmitter and wireless communication device using the same
CN102355204B (en) Automatic audio power amplifier switching circuit and power amplifier chip
WO2008105072A1 (en) Transmitter

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07737451

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 07737451

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP