JPS56137718A - Current source circuit - Google Patents

Current source circuit

Info

Publication number
JPS56137718A
JPS56137718A JP4088380A JP4088380A JPS56137718A JP S56137718 A JPS56137718 A JP S56137718A JP 4088380 A JP4088380 A JP 4088380A JP 4088380 A JP4088380 A JP 4088380A JP S56137718 A JPS56137718 A JP S56137718A
Authority
JP
Japan
Prior art keywords
trs
currents
base
input
current source
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
JP4088380A
Other languages
Japanese (ja)
Inventor
Toshiyuki Eto
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4088380A priority Critical patent/JPS56137718A/en
Publication of JPS56137718A publication Critical patent/JPS56137718A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02—Regulating voltage or current
    • G05F3/08—Regulating voltage or current wherein the variable is dc
    • G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
    • G05F3/16—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices
    • G05F3/20—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations
    • G05F3/26—Current mirrors
    • G05F3/265—Current mirrors using bipolar transistors only

Abstract

PURPOSE:To obtain high output impedance while improving the precision of an input-output current ratio, by supplying the base current of transmistor TR of a current source circuit as emitter currents of two TRs added for biasing. CONSTITUTION:In the circuit consisting of TRs 12 and 11 cascaded to input signal source 13, output-side TR17-TR2n+15 cascaded, and TR16-TR(2n-1)+15, TR14 is connected at base B to collector C of TR12 and C is connected to potential source V2<+>; and base B of TR15 connected to B of TR12 and emitter E of TR14, C is connected to potential source V<+>, and E is further connected to Bs of TR16 and TR11. Then, B currents of TR12 and TR17-TR2n+15, and TR11 and TR16-TR(2n+1)+15 are supplied as E currents of TR14 and TR15 added for biasing to improve the precision of the input-output current ratio, and further those two TRs constiture a Darlington-connected feedback circuit, so that high output impedance can be obtained.
JP4088380A 1980-03-28 1980-03-28 Current source circuit Pending JPS56137718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4088380A JPS56137718A (en) 1980-03-28 1980-03-28 Current source circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4088380A JPS56137718A (en) 1980-03-28 1980-03-28 Current source circuit

Publications (1)

Publication Number Publication Date
JPS56137718A true JPS56137718A (en) 1981-10-27

Family

ID=12592904

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4088380A Pending JPS56137718A (en) 1980-03-28 1980-03-28 Current source circuit

Country Status (1)

Country Link
JP (1) JPS56137718A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5386200A (en) * 1993-12-14 1995-01-31 Samsung Electronics Co., Ltd. IGFET current mirror amplifiers with nested-cascode input and output stages

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5386200A (en) * 1993-12-14 1995-01-31 Samsung Electronics Co., Ltd. IGFET current mirror amplifiers with nested-cascode input and output stages

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