JPS56160111A - Amplifier of pulse duration modulated signal - Google Patents

Amplifier of pulse duration modulated signal

Info

Publication number
JPS56160111A
JPS56160111A JP5101680A JP5101680A JPS56160111A JP S56160111 A JPS56160111 A JP S56160111A JP 5101680 A JP5101680 A JP 5101680A JP 5101680 A JP5101680 A JP 5101680A JP S56160111 A JPS56160111 A JP S56160111A
Authority
JP
Japan
Prior art keywords
current
supplied
pulse duration
input signal
modulated signal
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
JP5101680A
Other languages
Japanese (ja)
Inventor
Kyoji Baba
Takeshi Matsushita
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP5101680A priority Critical patent/JPS56160111A/en
Publication of JPS56160111A publication Critical patent/JPS56160111A/en
Pending legal-status Critical Current

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
    • H03F1/0261—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 polarisation voltage or current, e.g. gliding Class A

Landscapes

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

Abstract

PURPOSE:To reduce the consumption of electric power, by varying the driving power of the amplifying stages preceding the driving stage that drives an output stage in accordance with the amplitude of a modulated signal. CONSTITUTION:The input signal supplied to a terminal 1 receives a modulation of pulse duration through a pulse duration modulating circuit 2 to be supplied to the base of a driving transistor (TR)3. Thus output TRs 4a and 4b are driven. The current of a TR31 varies by a change of the collector current of a TR17a to which the input signal is supplied. In this case, the current also varies for a TR29 that forms a current Miller circuit along with the TR31. Then the current corresponding to the collector current of the TR31 is supplied to the TR29 to be used as a power source of the TR4a. In other words, the voltage that drives an output TR is reduced when the amplitude of the input signal is small.
JP5101680A 1980-04-17 1980-04-17 Amplifier of pulse duration modulated signal Pending JPS56160111A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5101680A JPS56160111A (en) 1980-04-17 1980-04-17 Amplifier of pulse duration modulated signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5101680A JPS56160111A (en) 1980-04-17 1980-04-17 Amplifier of pulse duration modulated signal

Publications (1)

Publication Number Publication Date
JPS56160111A true JPS56160111A (en) 1981-12-09

Family

ID=12874986

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5101680A Pending JPS56160111A (en) 1980-04-17 1980-04-17 Amplifier of pulse duration modulated signal

Country Status (1)

Country Link
JP (1) JPS56160111A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6218804A (en) * 1985-07-17 1987-01-27 Smc Corp Power amplifier for electromagnetic proportional control valve
JPH02125506A (en) * 1988-11-04 1990-05-14 Toshiba Corp Pulse width modulation type power amplifier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6218804A (en) * 1985-07-17 1987-01-27 Smc Corp Power amplifier for electromagnetic proportional control valve
JPH02125506A (en) * 1988-11-04 1990-05-14 Toshiba Corp Pulse width modulation type power amplifier

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