JPS5676615A - Amplifying circuit - Google Patents

Amplifying circuit

Info

Publication number
JPS5676615A
JPS5676615A JP15340079A JP15340079A JPS5676615A JP S5676615 A JPS5676615 A JP S5676615A JP 15340079 A JP15340079 A JP 15340079A JP 15340079 A JP15340079 A JP 15340079A JP S5676615 A JPS5676615 A JP S5676615A
Authority
JP
Japan
Prior art keywords
base
vbe1
vbe2
trs
produced
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.)
Granted
Application number
JP15340079A
Other languages
Japanese (ja)
Other versions
JPS6217890B2 (en
Inventor
Koichi Oota
Hayashi Suzuki
Yoshihiko Taniguchi
Yoshinori Nakamura
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP15340079A priority Critical patent/JPS5676615A/en
Publication of JPS5676615A publication Critical patent/JPS5676615A/en
Publication of JPS6217890B2 publication Critical patent/JPS6217890B2/ja
Granted 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
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3069—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output
    • H03F3/3076—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output with symmetrical driving of the end stage

Landscapes

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

Abstract

PURPOSE:To prevent the production of thermal runaway and to avoid the crossover distortion, by inserting the circuit connecting diodes with antiparallel between one base and ground of a push-pull amplifier. CONSTITUTION:When a sinusoidal wave is fed to the base of a prestage transistor TR1, this signal is amplified and an output voltage is produced at the collector of TR1, i.e. point B. Taking the base-to-emitter voltage of TRs 8, 9 as VBE1, VBE2 respectively and the forward voltage of diodes 4, 5 as respectively VF1, VF2, selection is made that VF1=VBE1 and VF2=VBE2 are obtained. The signal at point B is amplified at TRs 8, 9 and an output is produced at point C. Since no base bias voltage is given to TRs 8, 9, the input is cut off to the DC value V1 between +VBE1 and -VBE2. Accordingly, the production of thermal runaway can be prevented and no crossover distortion is produced through cancellation.
JP15340079A 1979-11-27 1979-11-27 Amplifying circuit Granted JPS5676615A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15340079A JPS5676615A (en) 1979-11-27 1979-11-27 Amplifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15340079A JPS5676615A (en) 1979-11-27 1979-11-27 Amplifying circuit

Publications (2)

Publication Number Publication Date
JPS5676615A true JPS5676615A (en) 1981-06-24
JPS6217890B2 JPS6217890B2 (en) 1987-04-20

Family

ID=15561656

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15340079A Granted JPS5676615A (en) 1979-11-27 1979-11-27 Amplifying circuit

Country Status (1)

Country Link
JP (1) JPS5676615A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3530228B1 (en) 2016-11-29 2022-04-13 Sony Olympus Medical Solutions Inc. Microscope device and control method

Also Published As

Publication number Publication date
JPS6217890B2 (en) 1987-04-20

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