JPS5686519A - Power amplifier - Google Patents

Power amplifier

Info

Publication number
JPS5686519A
JPS5686519A JP16441579A JP16441579A JPS5686519A JP S5686519 A JPS5686519 A JP S5686519A JP 16441579 A JP16441579 A JP 16441579A JP 16441579 A JP16441579 A JP 16441579A JP S5686519 A JPS5686519 A JP S5686519A
Authority
JP
Japan
Prior art keywords
output
period
input
amplifier
ripple components
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
JP16441579A
Other languages
Japanese (ja)
Other versions
JPS6059764B2 (en
Inventor
Fumio Hori
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP16441579A priority Critical patent/JPS6059764B2/en
Publication of JPS5686519A publication Critical patent/JPS5686519A/en
Publication of JPS6059764B2 publication Critical patent/JPS6059764B2/en
Expired legal-status Critical Current

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
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/217—Class D power amplifiers; Switching amplifiers

Abstract

PURPOSE:To realize the power amplifier to be applied to highly broad band, by partly delaying the pulse width modulation signal by 1/2 period of the carrier signal frequency, power-amplifying them with two output amplifiers, adding the outputs and reducing the noise level. CONSTITUTION:When the input signal is zero, the output of the pulse width modulator 2 is input to an amplifier 4. Further, the pulse output delayed by 1/2 period is input to the amplifier 4'. The output of the amplifiers 4, 4' is inverted by 1/2 period, i.e. 180 deg., at duty 50%, for the phase. By adding the outputs through a coil L for the low-pass filter, the current flowing to a capacitor C for integration is cancelled to cancel the ripple components completely. Further, when the input signal is positive, the ripple components are doubled for the frequency of the respective ripple components.
JP16441579A 1979-12-17 1979-12-17 power amplifier Expired JPS6059764B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16441579A JPS6059764B2 (en) 1979-12-17 1979-12-17 power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16441579A JPS6059764B2 (en) 1979-12-17 1979-12-17 power amplifier

Publications (2)

Publication Number Publication Date
JPS5686519A true JPS5686519A (en) 1981-07-14
JPS6059764B2 JPS6059764B2 (en) 1985-12-26

Family

ID=15792704

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16441579A Expired JPS6059764B2 (en) 1979-12-17 1979-12-17 power amplifier

Country Status (1)

Country Link
JP (1) JPS6059764B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003060443A (en) * 2001-08-21 2003-02-28 Sony Corp Switch amplifying unit
WO2004017513A1 (en) * 2002-08-14 2004-02-26 Dspfactory Sa Amplifier
JP2009147552A (en) * 2007-12-12 2009-07-02 Panasonic Corp Class d amplifier
EP2573938A1 (en) * 2011-09-22 2013-03-27 Alcatel Lucent A method for signal amplification based on pulse width modulation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003060443A (en) * 2001-08-21 2003-02-28 Sony Corp Switch amplifying unit
WO2004017513A1 (en) * 2002-08-14 2004-02-26 Dspfactory Sa Amplifier
JP2009147552A (en) * 2007-12-12 2009-07-02 Panasonic Corp Class d amplifier
EP2573938A1 (en) * 2011-09-22 2013-03-27 Alcatel Lucent A method for signal amplification based on pulse width modulation

Also Published As

Publication number Publication date
JPS6059764B2 (en) 1985-12-26

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