JPS56169404A - Current amplifying circuit - Google Patents

Current amplifying circuit

Info

Publication number
JPS56169404A
JPS56169404A JP7287180A JP7287180A JPS56169404A JP S56169404 A JPS56169404 A JP S56169404A JP 7287180 A JP7287180 A JP 7287180A JP 7287180 A JP7287180 A JP 7287180A JP S56169404 A JPS56169404 A JP S56169404A
Authority
JP
Japan
Prior art keywords
current
collector
pinch
circuit
trs
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
JP7287180A
Other languages
Japanese (ja)
Other versions
JPS6329847B2 (en
Inventor
Yamato Okashin
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP7287180A priority Critical patent/JPS56169404A/en
Publication of JPS56169404A publication Critical patent/JPS56169404A/en
Publication of JPS6329847B2 publication Critical patent/JPS6329847B2/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
    • H03F3/34—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 suppress the dispersion of characteristics by obtaining a resistance value corresponding to a DC current amplification factor, by forming pinch resistors on the same semiconductor substrate as the 1st and 2nd transistor (TRs) and restricting the width of base diffusion region to the same as to individual ICs. CONSTITUTION:Pinch resistors 13, 14 are inserted respectively to the collector and the emitter of a TR12 forming a current Miller circuit MK, and an output current picked up from the collector of the 1st TR12 is taken as a driving current and fed to the base of the 2nd TR2, and all the circuit elements are formed on the same semiconductor substrate. Thus, even if the hFE of the TRs is varied, since the ratio of the resistance values of the pinch resistors 13, 14 is constant and the ratio of the pinch resistor 14 to a diffusion resistance 4 is changed, the variance of the collector current of the 2nd TR is not fluctuated. For example, when this circuit is applied to a tuning meter, the indication value of the tuning meter 17 can not be fluctuated.
JP7287180A 1980-05-30 1980-05-30 Current amplifying circuit Granted JPS56169404A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7287180A JPS56169404A (en) 1980-05-30 1980-05-30 Current amplifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7287180A JPS56169404A (en) 1980-05-30 1980-05-30 Current amplifying circuit

Publications (2)

Publication Number Publication Date
JPS56169404A true JPS56169404A (en) 1981-12-26
JPS6329847B2 JPS6329847B2 (en) 1988-06-15

Family

ID=13501810

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7287180A Granted JPS56169404A (en) 1980-05-30 1980-05-30 Current amplifying circuit

Country Status (1)

Country Link
JP (1) JPS56169404A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0525655U (en) * 1991-03-14 1993-04-02 ウシオ電機株式会社 Incandescent light bulb

Also Published As

Publication number Publication date
JPS6329847B2 (en) 1988-06-15

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