WO2008105072A1 - Transmitter - Google Patents

Transmitter Download PDF

Info

Publication number
WO2008105072A1
WO2008105072A1 PCT/JP2007/053648 JP2007053648W WO2008105072A1 WO 2008105072 A1 WO2008105072 A1 WO 2008105072A1 JP 2007053648 W JP2007053648 W JP 2007053648W WO 2008105072 A1 WO2008105072 A1 WO 2008105072A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
pulse width
width modulation
applied voltage
less
Prior art date
Application number
PCT/JP2007/053648
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/JP2007/053648 priority Critical patent/WO2008105072A1/en
Publication of WO2008105072A1 publication Critical patent/WO2008105072A1/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
    • 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

Abstract

A transmitter capable of amplifying even a wide dynamic range signal with high efficiency and low distortion. The transmitter has a level separator for separating an envelope signal into a signal not less than a reference level and a signal less than the reference level according to the signal level of the envelope signal, a first pulse width modulator for performing the pulse width modulation of the signal not less than the reference level to form a first pulse width modulation signal, a second pulse width modulator for performing the pulse width modulation of the signal less than the reference level to form a second pulse width modulation signal, a first transistor to which a first applied voltage is supplied and which allows the first pulse width modulation signal to switch over the first applied voltage for output, a second transistor to which a second applied voltage smaller than the first applied voltage is supplied and which allows the second pulse width modulation signal to switch over the second applied voltage for output, and a smoothing circuit for smoothing the combined signal of the output signals of the first and second transistors to output it to the power supply terminal of a power amplifier.
PCT/JP2007/053648 2007-02-27 2007-02-27 Transmitter WO2008105072A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/053648 WO2008105072A1 (en) 2007-02-27 2007-02-27 Transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/053648 WO2008105072A1 (en) 2007-02-27 2007-02-27 Transmitter

Publications (1)

Publication Number Publication Date
WO2008105072A1 true WO2008105072A1 (en) 2008-09-04

Family

ID=39720918

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/053648 WO2008105072A1 (en) 2007-02-27 2007-02-27 Transmitter

Country Status (1)

Country Link
WO (1) WO2008105072A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012111100A1 (en) * 2011-02-16 2012-08-23 富士通株式会社 Amplification device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6260306A (en) * 1985-09-10 1987-03-17 Toshiba Corp Pwm drive circuit
JP2003179444A (en) * 2001-12-11 2003-06-27 Fujitsu Ltd Voltage-controlled power amplifier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6260306A (en) * 1985-09-10 1987-03-17 Toshiba Corp Pwm drive circuit
JP2003179444A (en) * 2001-12-11 2003-06-27 Fujitsu Ltd Voltage-controlled power amplifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012111100A1 (en) * 2011-02-16 2012-08-23 富士通株式会社 Amplification device

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