GB1307610A - Constant current amplifiers - Google Patents

Constant current amplifiers

Info

Publication number
GB1307610A
GB1307610A GB4143870A GB4143870A GB1307610A GB 1307610 A GB1307610 A GB 1307610A GB 4143870 A GB4143870 A GB 4143870A GB 4143870 A GB4143870 A GB 4143870A GB 1307610 A GB1307610 A GB 1307610A
Authority
GB
United Kingdom
Prior art keywords
collector
transistor
emitter
constant
base
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.)
Expired
Application number
GB4143870A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1307610A publication Critical patent/GB1307610A/en
Expired 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

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)
  • Amplifiers (AREA)
  • Bipolar Integrated Circuits (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

1307610 Automatic current regulation SIEMENS AG 28 Aug 1970 [29 Aug 1969] 41438/70 Heading G3X [Also in Division H3] An integrated circuit amplifier or stable current source comprises two transistors T1, T2, carrying currents related by the relative area of their emitter junctions, a common base current source provided by a further transistor T3 connected also to maintain a constant collectorbase voltage for T1, the collector of T2 being connected to the emitter of a transistor having its base connected to collector of T1 to maintain the collector-base voltage of T2 constant. The transistor connected to the collector of T2 may be either a further transistor T4 or may be transistor T3 with a second emitter connected to T2 T5 Fig.3, (not shown). It is explained that the current 12 and 14 bear a fixed relation to I1 and are independent of the collector voltages..
GB4143870A 1969-08-29 1970-08-28 Constant current amplifiers Expired GB1307610A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691944028 DE1944028B2 (en) 1969-08-29 1969-08-29 CONSTANT CURRENT AMPLIFIER IN INTEGRATED DESIGN

Publications (1)

Publication Number Publication Date
GB1307610A true GB1307610A (en) 1973-02-21

Family

ID=5744154

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4143870A Expired GB1307610A (en) 1969-08-29 1970-08-28 Constant current amplifiers

Country Status (9)

Country Link
AT (1) AT297800B (en)
BE (1) BE755453A (en)
CH (1) CH515653A (en)
DE (1) DE1944028B2 (en)
FR (1) FR2059737B1 (en)
GB (1) GB1307610A (en)
LU (1) LU61586A1 (en)
NL (1) NL7012279A (en)
SE (1) SE366179B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4786970A (en) * 1987-08-26 1988-11-22 Eastman Kodak Company Logarithmic amplifier

Also Published As

Publication number Publication date
SE366179B (en) 1974-04-08
NL7012279A (en) 1971-03-02
CH515653A (en) 1971-11-15
DE1944028B2 (en) 1971-03-11
FR2059737B1 (en) 1973-01-12
AT297800B (en) 1972-04-10
DE1944028A1 (en) 1971-03-11
FR2059737A1 (en) 1971-06-04
BE755453A (en) 1971-03-01
LU61586A1 (en) 1971-06-22

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Legal Events

Date Code Title Description
PS Patent sealed