JPS55107312A - Current mirror circuit - Google Patents

Current mirror circuit

Info

Publication number
JPS55107312A
JPS55107312A JP1431879A JP1431879A JPS55107312A JP S55107312 A JPS55107312 A JP S55107312A JP 1431879 A JP1431879 A JP 1431879A JP 1431879 A JP1431879 A JP 1431879A JP S55107312 A JPS55107312 A JP S55107312A
Authority
JP
Japan
Prior art keywords
transistors
transistor
collector
bases
collectors
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
JP1431879A
Other languages
Japanese (ja)
Inventor
Masaru Hashimoto
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 JP1431879A priority Critical patent/JPS55107312A/en
Publication of JPS55107312A publication Critical patent/JPS55107312A/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
    • H03F3/34—DC amplifiers in which all stages are DC-coupled
    • H03F3/343—DC amplifiers in which all stages are DC-coupled with semiconductor devices only

Landscapes

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

Abstract

PURPOSE:To achieve correct correspondence between the input and output current, by connecting the emitter of the first and second transistors in which the bases are mutually connected to the voltage supply source and connecting the collectors to the emitters of the fourth and third transistors. CONSTITUTION:The emitters of the transistors 1, 2 connecting the bases mutually are respectively connected to the voltage supply source Vcc, and the emitters of the transistors 4, 3 connected to the bases are respectively connected to the collectors. The bases and the collectors of the transistors 2, 4 are connected one another. The input current Iin is fed to the collector of the transistor 4 and the output current Iout is obtained from the collector of the transistor 3. With this constitution, the collector to emitter voltage of the transistor 1 is almost equal to the collector to emitter voltage of the transistor 2, allowing to make equal the collector currents ic1 and ic2 of the transistors 1, 2. Accordingly, the current amplification rate of each transistor is sufficiently greater and the base current is neglected, then ic1=ic4=Iin, ic2=ic3=Iout are obtained and Iin=Iout is made possible.
JP1431879A 1979-02-13 1979-02-13 Current mirror circuit Pending JPS55107312A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1431879A JPS55107312A (en) 1979-02-13 1979-02-13 Current mirror circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1431879A JPS55107312A (en) 1979-02-13 1979-02-13 Current mirror circuit

Publications (1)

Publication Number Publication Date
JPS55107312A true JPS55107312A (en) 1980-08-18

Family

ID=11857732

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1431879A Pending JPS55107312A (en) 1979-02-13 1979-02-13 Current mirror circuit

Country Status (1)

Country Link
JP (1) JPS55107312A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60136541U (en) * 1985-01-17 1985-09-10 富士通株式会社 level detection circuit
JPH0195610A (en) * 1987-10-08 1989-04-13 Fuji Electric Co Ltd Voltage buffer circuit
JPH01168104A (en) * 1987-12-24 1989-07-03 Yokogawa Electric Corp Current mirror circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60136541U (en) * 1985-01-17 1985-09-10 富士通株式会社 level detection circuit
JPH0195610A (en) * 1987-10-08 1989-04-13 Fuji Electric Co Ltd Voltage buffer circuit
JPH01168104A (en) * 1987-12-24 1989-07-03 Yokogawa Electric Corp Current mirror circuit

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