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JPS56112876A - Supply-voltage controlling type amplifier - Google Patents

Supply-voltage controlling type amplifier

Info

Publication number
JPS56112876A
JPS56112876A JP1251080A JP1251080A JPS56112876A JP S56112876 A JPS56112876 A JP S56112876A JP 1251080 A JP1251080 A JP 1251080A JP 1251080 A JP1251080 A JP 1251080A JP S56112876 A JPS56112876 A JP S56112876A
Authority
JP
Japan
Prior art keywords
voltage
output
converter
power source
input 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
JP1251080A
Other languages
Japanese (ja)
Inventor
Harushige Nakagaki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1251080A priority Critical patent/JPS56112876A/en
Publication of JPS56112876A publication Critical patent/JPS56112876A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PURPOSE:To raise power efficiency by applying a switching method to a power source part, controlling the voltage value of the power source in accordance with the amplitude of an input signal and thereby making an amplifying element operate constantly in the condition near to the maximum output. CONSTITUTION:The power source part 11 rectifying and smoothing an AC power source is connected with a DC-DC converter 12 whereby positive and negative DC voltage is obtained and the output thereof is supplied to a load 2 through the main amplifier 16. Meanwhile, the voltage level of an input signal source 25 is passed through a PWM converter including a signal amplifier 17, a carrier generator 18, voltage comparing amplifiers 20 and 21 and reference voltage 22 and 23, and by the output thereof the DC-DC converter 12 is driven. Accordingly, the output voltage of the converter 12 is controlled in accordance with the voltage level of the input signal source 25 and thereby the amplifying element of the main amplifier 16 can be operated constantly in the condition near the maximum output, and thus the power efficiency can be raised without using a plurality of power sources and amplifying elements.
JP1251080A 1980-02-06 1980-02-06 Supply-voltage controlling type amplifier Pending JPS56112876A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1251080A JPS56112876A (en) 1980-02-06 1980-02-06 Supply-voltage controlling type amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1251080A JPS56112876A (en) 1980-02-06 1980-02-06 Supply-voltage controlling type amplifier

Publications (1)

Publication Number Publication Date
JPS56112876A true JPS56112876A (en) 1981-09-05

Family

ID=11807335

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1251080A Pending JPS56112876A (en) 1980-02-06 1980-02-06 Supply-voltage controlling type amplifier

Country Status (1)

Country Link
JP (1) JPS56112876A (en)

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