IT1258234B - REFERENCE CURRENT GENERATOR - Google Patents

REFERENCE CURRENT GENERATOR

Info

Publication number
IT1258234B
IT1258234B ITMI922024A ITMI922024A IT1258234B IT 1258234 B IT1258234 B IT 1258234B IT MI922024 A ITMI922024 A IT MI922024A IT MI922024 A ITMI922024 A IT MI922024A IT 1258234 B IT1258234 B IT 1258234B
Authority
IT
Italy
Prior art keywords
transistor
branch
downstream
branches
series
Prior art date
Application number
ITMI922024A
Other languages
Italian (it)
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 filed Critical
Publication of ITMI922024A0 publication Critical patent/ITMI922024A0/en
Publication of ITMI922024A1 publication Critical patent/ITMI922024A1/en
Application granted granted Critical
Publication of IT1258234B publication Critical patent/IT1258234B/en

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Electrical Variables (AREA)
  • Amplifiers (AREA)

Abstract

Il generatore, utilizzabile in telefonia, fornisce una corrente adattabile con l'aiuto di una resistenza esterna (28). Esso comprende tre rami montati tra un'alimentazione (+V) e una stessa impedenza interna (10) di chiusura del circuito. Uno dei rami comporta un transistor a monte (12) montato a diodo, in serie con un transistor a valle (14a, 14b) polarizzato alla tensione d'intervallo di banda d'energia, un secondo ramo comporta un transistor a monte (16) in serie con un transistor a valle (22) montato a diodo, e un terzo ramo comporta un transistor a monte (18) in serie con un transistor a valle (22) di riproduzione della corrente che attraversa il transistor a valle del secondo ramo, le basi del transistor a monte (12, 16, 18) sono portate allo stesso potenziale e le basi dei transistor a valle (20, 22) del secondo e del terzo ramo sono collegate a un'uscita di diramazione della resistenza esterna (28) di adattamento la corrente d'uscita (I) essendo prelevata tra i transistor (18,22) del terzo ramo.The generator, which can be used in telephony, supplies an adaptable current with the help of an external resistance (28). It includes three branches mounted between a power supply (+ V) and the same internal impedance (10) for closing the circuit. One of the branches involves a diode-mounted upstream transistor (12), in series with a downstream transistor (14a, 14b) polarized at the energy band interval voltage, a second branch involves an upstream transistor (16) in series with a diode-mounted downstream transistor (22), and a third branch comprises an upstream transistor (18) in series with a downstream transistor (22) reproducing the current flowing through the downstream transistor of the second branch, the bases of the upstream transistor (12, 16, 18) are brought to the same potential and the bases of the downstream transistors (20, 22) of the second and third branches are connected to a branch output of the external resistance (28) the output current (I) being adapted between the transistors (18,22) of the third branch.

ITMI922024A 1991-08-28 1992-08-28 REFERENCE CURRENT GENERATOR IT1258234B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR919110687A FR2680888B1 (en) 1991-08-28 1991-08-28 REFERENCE CURRENT GENERATOR.

Publications (3)

Publication Number Publication Date
ITMI922024A0 ITMI922024A0 (en) 1992-08-28
ITMI922024A1 ITMI922024A1 (en) 1994-02-28
IT1258234B true IT1258234B (en) 1996-02-22

Family

ID=9416443

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI922024A IT1258234B (en) 1991-08-28 1992-08-28 REFERENCE CURRENT GENERATOR

Country Status (3)

Country Link
DE (1) DE9210915U1 (en)
FR (1) FR2680888B1 (en)
IT (1) IT1258234B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4326282C2 (en) * 1993-08-05 1995-12-14 Telefunken Microelectron Power source circuit
FR2809834B1 (en) 2000-05-30 2002-08-23 St Microelectronics Sa LOW-VOLTAGE AND LOW-SENSITIVITY CURRENT SOURCE

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4008441A (en) * 1974-08-16 1977-02-15 Rca Corporation Current amplifier
US4302718A (en) * 1980-05-27 1981-11-24 Rca Corporation Reference potential generating circuits
JP2542804B2 (en) * 1984-10-16 1996-10-09 三洋電機株式会社 Constant current circuit
US4673867A (en) * 1986-06-30 1987-06-16 Motorola, Inc. Current mirror circuit and method for providing zero temperature coefficient trimmable current ratios

Also Published As

Publication number Publication date
FR2680888B1 (en) 1994-09-30
ITMI922024A0 (en) 1992-08-28
ITMI922024A1 (en) 1994-02-28
FR2680888A1 (en) 1993-03-05
DE9210915U1 (en) 1992-10-29

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19950831