JPS5457940A - Transistor circuit - Google Patents

Transistor circuit

Info

Publication number
JPS5457940A
JPS5457940A JP12488577A JP12488577A JPS5457940A JP S5457940 A JPS5457940 A JP S5457940A JP 12488577 A JP12488577 A JP 12488577A JP 12488577 A JP12488577 A JP 12488577A JP S5457940 A JPS5457940 A JP S5457940A
Authority
JP
Japan
Prior art keywords
circuit
current
flowing
base
prevented
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
JP12488577A
Other languages
Japanese (ja)
Inventor
Yasuo Taguchi
Katsumi Nagano
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP12488577A priority Critical patent/JPS5457940A/en
Publication of JPS5457940A publication Critical patent/JPS5457940A/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
    • H03F3/45—Differential amplifiers

Landscapes

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

Abstract

PURPOSE:To prevent the detection level of input signals from error generation by constituting a circuit so that the current flowing to the base of an input-stage transistor may be absorbed by another circuit and the current may be prevented from flowing to the signal input end. CONSTITUTION:Power supply E is supplied to the emitter of bipolar transistor Tr16 through constant-current power source 15, and mirror circuit 20 detects the collector current of Tr 16 in one circuit 7 and flows the current coresponding to this current to other circuit 17 and controls so that the current corresponding to the current flowing to circuit 17 may be flowed to the collector of Tr16 by control circuit 18. Further, mirror circuit 23 is provided which has one circuit 21 connected to the base of Tr19 and has circuit 22, which flows the current corresponding to the current flowing to circuit 21, connected to the base of circuit 21. As a result, this circuit has a constitution where the current flowing to the base of Tr2 is absorbed by another circuit and the current is prevented from flowing to signal input end 10, so that the detection level of input signals can be prevented from error generation.
JP12488577A 1977-10-18 1977-10-18 Transistor circuit Pending JPS5457940A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12488577A JPS5457940A (en) 1977-10-18 1977-10-18 Transistor circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12488577A JPS5457940A (en) 1977-10-18 1977-10-18 Transistor circuit

Publications (1)

Publication Number Publication Date
JPS5457940A true JPS5457940A (en) 1979-05-10

Family

ID=14896493

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12488577A Pending JPS5457940A (en) 1977-10-18 1977-10-18 Transistor circuit

Country Status (1)

Country Link
JP (1) JPS5457940A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4984348A (en) * 1972-11-24 1974-08-13
JPS49102263A (en) * 1973-01-02 1974-09-27
JPS5199958A (en) * 1975-02-28 1976-09-03 Mitsubishi Electric Corp
JPS5214336A (en) * 1975-07-25 1977-02-03 Hitachi Denshi Ltd High input impedance differential amplifier circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4984348A (en) * 1972-11-24 1974-08-13
JPS49102263A (en) * 1973-01-02 1974-09-27
JPS5199958A (en) * 1975-02-28 1976-09-03 Mitsubishi Electric Corp
JPS5214336A (en) * 1975-07-25 1977-02-03 Hitachi Denshi Ltd High input impedance differential amplifier circuit

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