JPS55166315A - Pulse duration modulating amplifier - Google Patents

Pulse duration modulating amplifier

Info

Publication number
JPS55166315A
JPS55166315A JP7508079A JP7508079A JPS55166315A JP S55166315 A JPS55166315 A JP S55166315A JP 7508079 A JP7508079 A JP 7508079A JP 7508079 A JP7508079 A JP 7508079A JP S55166315 A JPS55166315 A JP S55166315A
Authority
JP
Japan
Prior art keywords
modulator
output
logic product
positive
inverter
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
JP7508079A
Other languages
Japanese (ja)
Inventor
Akio Tokuge
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP7508079A priority Critical patent/JPS55166315A/en
Publication of JPS55166315A publication Critical patent/JPS55166315A/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 ensure the assured ON/OFF action for the switching element of the positive and negative sides each by the positive and negative polarity periods of the input to eliminate the reactive power, at the same time reducing the spurious occurrence by having no switching ON at the nonload time. CONSTITUTION:Input audio IN is applied to PWM modulator 12 and inverter 10 which gives the inversion to the polarity, and the signal with the polarity inverted through inverter 10 is applied to PWM modulator 11. The input signal is sampled at modulators 11 and 12 each and via the sawtooth wave given from sawtooth wave generator 13 to then receive the PWM modulation according to the input level. The logic product is obtained through logic product gate 16 between the output obtained by inverting the output of modulator 11 via inverter 14 and the output of modulator 12; and the logic product is obtained through logic product gate 17 between the output obtained by inverting the output of modulator 12 and the output of modulator 11 respectively. Thus push-pull switching elements 18 and 19 are turned on and off with the outputs of gates 16 and 17. Thus the action can be assured for both the positive and negative polarity periods.
JP7508079A 1979-06-14 1979-06-14 Pulse duration modulating amplifier Pending JPS55166315A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7508079A JPS55166315A (en) 1979-06-14 1979-06-14 Pulse duration modulating amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7508079A JPS55166315A (en) 1979-06-14 1979-06-14 Pulse duration modulating amplifier

Publications (1)

Publication Number Publication Date
JPS55166315A true JPS55166315A (en) 1980-12-25

Family

ID=13565840

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7508079A Pending JPS55166315A (en) 1979-06-14 1979-06-14 Pulse duration modulating amplifier

Country Status (1)

Country Link
JP (1) JPS55166315A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003060450A (en) * 2001-08-21 2003-02-28 Sony Corp Switching amplifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003060450A (en) * 2001-08-21 2003-02-28 Sony Corp Switching amplifier

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