JPS57119682A - Power amplifier - Google Patents

Power amplifier

Info

Publication number
JPS57119682A
JPS57119682A JP56003041A JP304181A JPS57119682A JP S57119682 A JPS57119682 A JP S57119682A JP 56003041 A JP56003041 A JP 56003041A JP 304181 A JP304181 A JP 304181A JP S57119682 A JPS57119682 A JP S57119682A
Authority
JP
Japan
Prior art keywords
transistor
current
transistors
load
protective
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
JP56003041A
Other languages
Japanese (ja)
Inventor
Ryuichi Kyomasu
Nobuhiro Takasugi
Seiji Shigyo
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 JP56003041A priority Critical patent/JPS57119682A/en
Publication of JPS57119682A publication Critical patent/JPS57119682A/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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Motor And Converter Starters (AREA)

Abstract

PURPOSE:To prevent a short-circuit current which does not pass through a load by providing a power amplifier supplying a positive and negative bipolar current to a load from a unit power source with protective circuits turning off the other transistor when one transistor is turned on. CONSTITUTION:When a positive and negative bipolar current is supplied to a load M by operating four transistors Q1-Q4 by using a unit power source, a protective circuit consisting of a diode D2, a transistor Q6, and a resistor R2 is put in between the transistors, Q1 and Q2 and a protective circuit with the same composition is also provided between the transistors, Q3 and Q4 and a load M is connected across both the protective circuits. Therefore, reverse bias is applied to the transistor Q6 in the protective circuit when the transistor Q1 is on condition to flow no current to the transistor Q2. In the same way, no current is flowed into the Q4 when the Q3 is on condition and the generation of a short- circuit current can positively be prevented by simultaneously turning on the transistors.
JP56003041A 1981-01-14 1981-01-14 Power amplifier Pending JPS57119682A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56003041A JPS57119682A (en) 1981-01-14 1981-01-14 Power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56003041A JPS57119682A (en) 1981-01-14 1981-01-14 Power amplifier

Publications (1)

Publication Number Publication Date
JPS57119682A true JPS57119682A (en) 1982-07-26

Family

ID=11546219

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56003041A Pending JPS57119682A (en) 1981-01-14 1981-01-14 Power amplifier

Country Status (1)

Country Link
JP (1) JPS57119682A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4924397A (en) * 1986-12-08 1990-05-08 Honda Giken Kogyo K.K. Vehicle cruise control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4924397A (en) * 1986-12-08 1990-05-08 Honda Giken Kogyo K.K. Vehicle cruise control system

Similar Documents

Publication Publication Date Title
JPS5480655A (en) Protection circuit
JPS57119682A (en) Power amplifier
JPS5717226A (en) Integrated circuit
SU1059640A1 (en) Redundant power supply unit
JPS57125525A (en) Logical circuit
JPS566534A (en) Level converting circuit
JPS54116652A (en) Logical circuit provided with output protective circuit
JPS5461487A (en) Malfunction preventing circuit
JPS5735421A (en) Malfunction preventing circuit at power supply application
JPS5593320A (en) Switching unit
JPS54111650A (en) Overcurrent detection circuit
JPS5744336A (en) Logical circuit
JPS56729A (en) Electric power amplifying circuit
JPS57188134A (en) Ac two-wire type contactless switch
JPS57180224A (en) Flip-flop circuit
JPS5570999A (en) Switching circuit for power supply of memory
JPS57183276A (en) Base driving circuit for main circuit transistor in transistor inverter
JPS57144774A (en) Heat generating/recording elements driving circuit
JPS56168246A (en) Power supply circuit
JPS57151264A (en) Gate circuit for gate turn-off thyristor
JPS5686079A (en) Inverter circuit
JPS54147449A (en) Protective circuit
JPS5574614A (en) Short circuit protection circuit for constant voltage power supply
JPS5513605A (en) Voltage control circuit for pulse width modulation power soruce
JPS5448030A (en) Vercurrent protection circuit for swtching regulator