JPS5686518A - Amplifier or power supply circuit using pulse width modulation - Google Patents

Amplifier or power supply circuit using pulse width modulation

Info

Publication number
JPS5686518A
JPS5686518A JP16441479A JP16441479A JPS5686518A JP S5686518 A JPS5686518 A JP S5686518A JP 16441479 A JP16441479 A JP 16441479A JP 16441479 A JP16441479 A JP 16441479A JP S5686518 A JPS5686518 A JP S5686518A
Authority
JP
Japan
Prior art keywords
frequency
carrier frequency
filter
amplifier
power supply
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.)
Pending
Application number
JP16441479A
Other languages
Japanese (ja)
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 JP16441479A priority Critical patent/JPS5686518A/en
Publication of JPS5686518A publication Critical patent/JPS5686518A/en
Pending 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

Landscapes

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

Abstract

PURPOSE:To suppress the ripple components appeared at the output, by effectively removing the higher harmonic components of carrier frequency, through the connection of a filter rejecting the frequency components an integer number times the carrier frequency at the output side of a low-pass filter. CONSTITUTION:At the output side of a low-pass filter LC, a bridged T-type filter consisting of the 1st coil L1, the 1st and 2nd capacitors C1, C2, and resistor R is connected. Further, the parallel resonance frequency determined with a coil L1, and capacitors C1, C2 is set to a multiple of the carrier frequency, and when the value of the resistor R is set so that the transfer function from the input terminal of the filter LC to the output terminal 5 is almost zero at an integer number times the carrier frequency, the frequency characteristics of the bridged T type filter at that time have the attenuation of -40dB--80dB at the frequency f1 integer number times the carrier frequency.
JP16441479A 1979-12-17 1979-12-17 Amplifier or power supply circuit using pulse width modulation Pending JPS5686518A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16441479A JPS5686518A (en) 1979-12-17 1979-12-17 Amplifier or power supply circuit using pulse width modulation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16441479A JPS5686518A (en) 1979-12-17 1979-12-17 Amplifier or power supply circuit using pulse width modulation

Publications (1)

Publication Number Publication Date
JPS5686518A true JPS5686518A (en) 1981-07-14

Family

ID=15792683

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16441479A Pending JPS5686518A (en) 1979-12-17 1979-12-17 Amplifier or power supply circuit using pulse width modulation

Country Status (1)

Country Link
JP (1) JPS5686518A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59216489A (en) * 1983-05-20 1984-12-06 Toshiba Corp Controller for elevator
JPS6139621A (en) * 1984-07-30 1986-02-25 Fujitsu Ten Ltd Demodulating filter of pulse width demodulating type power amplifier
EP0506122A3 (en) * 1991-03-29 1994-09-14 Matsushita Electric Ind Co Ltd Power module
EP1479936A1 (en) * 2002-02-28 2004-11-24 Mitsubishi Denki Kabushiki Kaisha Controller of electromagnetic clutch
KR100487445B1 (en) * 2001-10-10 2005-05-03 야마하 가부시키가이샤 Class-d amplifier of btl output type using filter coil and low-pass filter
JP2009111693A (en) * 2007-10-30 2009-05-21 Alpine Electronics Inc Class-d amplifier
WO2019008628A1 (en) * 2017-07-03 2019-01-10 ヤマハ株式会社 Amplifying device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59216489A (en) * 1983-05-20 1984-12-06 Toshiba Corp Controller for elevator
JPS6139621A (en) * 1984-07-30 1986-02-25 Fujitsu Ten Ltd Demodulating filter of pulse width demodulating type power amplifier
EP0506122A3 (en) * 1991-03-29 1994-09-14 Matsushita Electric Ind Co Ltd Power module
KR100487445B1 (en) * 2001-10-10 2005-05-03 야마하 가부시키가이샤 Class-d amplifier of btl output type using filter coil and low-pass filter
EP1479936A1 (en) * 2002-02-28 2004-11-24 Mitsubishi Denki Kabushiki Kaisha Controller of electromagnetic clutch
EP1479936B1 (en) * 2002-02-28 2012-08-01 Mitsubishi Denki Kabushiki Kaisha Controller of electromagnetic clutch
JP2009111693A (en) * 2007-10-30 2009-05-21 Alpine Electronics Inc Class-d amplifier
WO2019008628A1 (en) * 2017-07-03 2019-01-10 ヤマハ株式会社 Amplifying device

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