JPS54125950A - Current mirror circuit - Google Patents

Current mirror circuit

Info

Publication number
JPS54125950A
JPS54125950A JP3292878A JP3292878A JPS54125950A JP S54125950 A JPS54125950 A JP S54125950A JP 3292878 A JP3292878 A JP 3292878A JP 3292878 A JP3292878 A JP 3292878A JP S54125950 A JPS54125950 A JP S54125950A
Authority
JP
Japan
Prior art keywords
current
source
base
current mirror
flowing
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
JP3292878A
Other languages
Japanese (ja)
Inventor
Shuichi Konno
Isao Namae
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan 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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP3292878A priority Critical patent/JPS54125950A/en
Publication of JPS54125950A publication Critical patent/JPS54125950A/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 secure the operation with a fixed current mirror ratio kept assuredly as well as to ensure the operation with the low voltage by preventing the base current of the transistors at the input and output sides from flowing to the constant current source. CONSTITUTION:Transistor Tr5 is driven by Tr4 connected directly to power source +B so that the base current of Tr1 and Tr2 of the input and output sides is prevented from being flown to constant current source 1. Thus, the ratio between current I1 flowing through source 1 and current I2 flowing through load 2, i.e., the current mirror ratio can be kept assuredly to secure the operation. And a small amount of current amplification rate hfe of Tr1 and Tr2 does not give any effect to the current mirror ratio at all. Furthermore, as the emitter of Tr4 is connected directly to source +B, the voltage between the emitter of Tr1 and the base of Tr4 turn to the inter-base and emitter voltage which can be driven with the low voltage.
JP3292878A 1978-03-24 1978-03-24 Current mirror circuit Pending JPS54125950A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3292878A JPS54125950A (en) 1978-03-24 1978-03-24 Current mirror circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3292878A JPS54125950A (en) 1978-03-24 1978-03-24 Current mirror circuit

Publications (1)

Publication Number Publication Date
JPS54125950A true JPS54125950A (en) 1979-09-29

Family

ID=12372564

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3292878A Pending JPS54125950A (en) 1978-03-24 1978-03-24 Current mirror circuit

Country Status (1)

Country Link
JP (1) JPS54125950A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4381484A (en) * 1981-06-01 1983-04-26 Motorola, Inc. Transistor current source
JPS59193644A (en) * 1983-04-15 1984-11-02 Rohm Co Ltd Output circuit of stereo demodulator
JPS59229908A (en) * 1983-05-27 1984-12-24 Rohm Co Ltd Current inverting circuit
JPS6014512A (en) * 1983-06-23 1985-01-25 ナシヨナル・セミコンダクタ−・コ−ポレ−シヨン Low voltage ic current source
JPS60229512A (en) * 1984-04-27 1985-11-14 Mitsubishi Electric Corp Current mirror circuit
JPS63304705A (en) * 1987-06-05 1988-12-13 Toshiba Corp Semiconductor circuit
JPH0295919U (en) * 1989-01-19 1990-07-31

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5012954A (en) * 1973-04-06 1975-02-10
JPS50137456A (en) * 1974-04-11 1975-10-31

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5012954A (en) * 1973-04-06 1975-02-10
JPS50137456A (en) * 1974-04-11 1975-10-31

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4381484A (en) * 1981-06-01 1983-04-26 Motorola, Inc. Transistor current source
JPS59193644A (en) * 1983-04-15 1984-11-02 Rohm Co Ltd Output circuit of stereo demodulator
JPS6253976B2 (en) * 1983-04-15 1987-11-12 Rohm Kk
JPS59229908A (en) * 1983-05-27 1984-12-24 Rohm Co Ltd Current inverting circuit
JPH0526363B2 (en) * 1983-05-27 1993-04-15 Rohm Kk
JPS6014512A (en) * 1983-06-23 1985-01-25 ナシヨナル・セミコンダクタ−・コ−ポレ−シヨン Low voltage ic current source
JPH0563111U (en) * 1983-06-23 1993-08-20 ナショナル・セミコンダクター・コーポレーション Low voltage current mirror circuit
JPS60229512A (en) * 1984-04-27 1985-11-14 Mitsubishi Electric Corp Current mirror circuit
JPH0466125B2 (en) * 1984-04-27 1992-10-22 Mitsubishi Electric Corp
JPS63304705A (en) * 1987-06-05 1988-12-13 Toshiba Corp Semiconductor circuit
JPH0295919U (en) * 1989-01-19 1990-07-31

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