GB1506882A - Current regulating circuits - Google Patents

Current regulating circuits

Info

Publication number
GB1506882A
GB1506882A GB3062775A GB3062775A GB1506882A GB 1506882 A GB1506882 A GB 1506882A GB 3062775 A GB3062775 A GB 3062775A GB 3062775 A GB3062775 A GB 3062775A GB 1506882 A GB1506882 A GB 1506882A
Authority
GB
United Kingdom
Prior art keywords
resistor
transistors
emitter
gain
transistor
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
GB3062775A
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.)
RCA Corp
Original Assignee
RCA 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 RCA Corp filed Critical RCA Corp
Priority to GB3062775A priority Critical patent/GB1506882A/en
Priority to US05/646,954 priority patent/US4063149A/en
Priority to AU11287/76A priority patent/AU498701B2/en
Priority to NL7601801A priority patent/NL7601801A/en
Priority to IT7620476A priority patent/IT1055447B/en
Priority to DE2607422A priority patent/DE2607422C3/en
Priority to FR7605118A priority patent/FR2301861A1/en
Publication of GB1506882A publication Critical patent/GB1506882A/en
Expired 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
    • H03F3/347—DC amplifiers in which all stages are DC-coupled with semiconductor devices only in integrated circuits
    • 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)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

1506882 Exponential function generators RCA CORPORATION 22 July 1975 [24 Feb 1975] 30627/75 Divided out of 1506881 Heading G4G [Also in Divisions G3 and H3] A current amplifier having a gain which falls exponentially with input current I 1 applied at terminal 32 comprises transistors 35 and 36 and resistor 34. At small input currents, little voltage is dropped across resistor 34 so the base-emitter voltages of transistors 34 and 36 are substantially equal. The output current at 33 is therefore -HoI 1 where Ho is the ratio of the emitter areas of transistors 36 and 35. As I 1 increases the voltage drop across resistor 34 reduces the base-emitter voltage of transistor 36 relative to transistor 35, thereby reducing the gain.
GB3062775A 1975-02-24 1975-07-22 Current regulating circuits Expired GB1506882A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB3062775A GB1506882A (en) 1975-07-22 1975-07-22 Current regulating circuits
US05/646,954 US4063149A (en) 1975-02-24 1976-01-07 Current regulating circuits
AU11287/76A AU498701B2 (en) 1975-02-24 1976-02-20 Current regulating amplifier circuit
NL7601801A NL7601801A (en) 1975-02-24 1976-02-23 DEVICE FOR REGULATING AN ELECTRICAL POWER.
IT7620476A IT1055447B (en) 1975-02-24 1976-02-23 CURRENT REGULATOR CIRCUIT
DE2607422A DE2607422C3 (en) 1975-02-24 1976-02-24 Current control circuit
FR7605118A FR2301861A1 (en) 1975-02-24 1976-02-24 CURRENT REGULATION CIRCUIT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3062775A GB1506882A (en) 1975-07-22 1975-07-22 Current regulating circuits

Publications (1)

Publication Number Publication Date
GB1506882A true GB1506882A (en) 1978-04-12

Family

ID=10310607

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3062775A Expired GB1506882A (en) 1975-02-24 1975-07-22 Current regulating circuits

Country Status (1)

Country Link
GB (1) GB1506882A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee