GB1408985A - Constant current circuits - Google Patents

Constant current circuits

Info

Publication number
GB1408985A
GB1408985A GB2705373A GB2705373A GB1408985A GB 1408985 A GB1408985 A GB 1408985A GB 2705373 A GB2705373 A GB 2705373A GB 2705373 A GB2705373 A GB 2705373A GB 1408985 A GB1408985 A GB 1408985A
Authority
GB
United Kingdom
Prior art keywords
transistors
output
constant
base
june
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
GB2705373A
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
Publication of GB1408985A publication Critical patent/GB1408985A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/307—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in push-pull amplifiers
    • 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
    • G05F3/22—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations wherein the transistors are of the bipolar type only
    • G05F3/222—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations wherein the transistors are of the bipolar type only with compensation for device parameters, e.g. Early effect, gain, manufacturing process, or external variations, e.g. temperature, loading, supply voltage
    • G05F3/227—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations wherein the transistors are of the bipolar type only with compensation for device parameters, e.g. Early effect, gain, manufacturing process, or external variations, e.g. temperature, loading, supply voltage producing a current or voltage as a predetermined function of the supply voltage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3083—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the power transistors being of the same type
    • H03F3/3086—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the power transistors being of the same type two power transistors being controlled by the input signal

Abstract

1408985 Automatic current and voltage regulation SONY CORP 6 June 1973 [6 June 1972] 27053/73 Heading G3X [Also in Division H3] A constant current independent of supply voltage is provided by a circuit comprising two transistors 3, 4 of opposite conductivity type cross-coupled collector-to-base, having emitters connected to respective supply terminals and a semi-conductor junction bias device connected across each emitter-base path, e.g. diode connected transistors 5, 6, further transistors 7, 8 having their bases and emitters connected to the corresponding electrodes of transistors 3 and 4 to provide the constant output currents. It is explained that the regenerative connection of transistors 3 and 4 provides constant base currents to output transistors 7 and 8 and that the output currents depend upon the junction areas. The diode connected transistors each may be replaced by a pair of series-connected diodes and emitter resistors may be provided for transistors 3 and 4, Figs. 5 and 7 (not shown). In these figures transistors 7 and 8 are used as the loads for the input and output stage of an amplifier. In Figures 8 and 11 (not shown), a constant voltage device in the form of a Zener diode or a suitably biased transistor (20) is connected in series between the collectors of the output transistors 7, 8 to provide thereacross a floating constant voltage supply.
GB2705373A 1972-06-06 1973-06-06 Constant current circuits Expired GB1408985A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5635072A JPS5436286B2 (en) 1972-06-06 1972-06-06
JP5634972A JPS5436287B2 (en) 1972-06-06 1972-06-06

Publications (1)

Publication Number Publication Date
GB1408985A true GB1408985A (en) 1975-10-08

Family

ID=26397296

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2705373A Expired GB1408985A (en) 1972-06-06 1973-06-06 Constant current circuits

Country Status (6)

Country Link
US (1) US3900790A (en)
JP (2) JPS5436287B2 (en)
CA (1) CA1014614A (en)
DE (1) DE2328402C2 (en)
GB (1) GB1408985A (en)
NL (1) NL7307920A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5241855A (en) * 1975-09-30 1977-03-31 Toshiba Corp Ac constant current power circuit
JPS5942707B2 (en) * 1976-03-08 1984-10-17 日本ペイント株式会社 Active energy beam-curable coating composition for temporary rust prevention of oil-adhered steel materials
JPS52142610A (en) * 1976-05-24 1977-11-28 Daido Steel Co Ltd Method of producing rolled band out of metallic powder
US4119924A (en) * 1977-09-06 1978-10-10 Rca Corporation Switchable current amplifiers
JPS55611A (en) * 1978-06-09 1980-01-07 Toshiba Corp Constant current circuit
JPS54161871A (en) * 1978-06-13 1979-12-21 Matsushita Electric Ind Co Ltd Oscillation circuit
DE4136605A1 (en) * 1991-11-07 1993-05-13 Philips Patentverwaltung AMPLIFIER
JP2904200B2 (en) * 1997-11-04 1999-06-14 日本電気株式会社 Solid-state imaging device
JP2003518309A (en) * 1999-12-21 2003-06-03 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Voltage generator with current limiter
JP4852250B2 (en) * 2005-02-10 2012-01-11 千代田工販株式会社 Spatial illuminance measuring apparatus and spatial illuminance calibration method
DE102010051406A1 (en) 2010-11-16 2012-05-16 Init Innovative Informatikanwendungen In Transport-, Verkehrs- Und Leitsystemen Gmbh power source

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1131497A (en) * 1965-11-04 1968-10-23 Hawker Siddeley Dynamics Ltd Improvements relating to reference voltage circuits
US3392344A (en) * 1966-09-12 1968-07-09 Bell Telephone Labor Inc Linear transistor circuit for negative impedance network
US3555309A (en) * 1967-11-03 1971-01-12 Rca Corp Electrical circuits
US3534245A (en) * 1967-12-08 1970-10-13 Rca Corp Electrical circuit for providing substantially constant current
US3588672A (en) * 1968-02-08 1971-06-28 Tektronix Inc Current regulator controlled by voltage across semiconductor junction device
US3529256A (en) * 1968-10-07 1970-09-15 Texas Instruments Inc Integrated band-pass filter
US3617859A (en) * 1970-03-23 1971-11-02 Nat Semiconductor Corp Electrical regulator apparatus including a zero temperature coefficient voltage reference circuit
US3651347A (en) * 1970-09-28 1972-03-21 Rca Corp Signal translating stage providing direct voltage translation independent of supplied operating potential
US3648153A (en) * 1970-11-04 1972-03-07 Rca Corp Reference voltage source
US3777251A (en) * 1972-10-03 1973-12-04 Motorola Inc Constant current regulating circuit

Also Published As

Publication number Publication date
JPS5436287B2 (en) 1979-11-08
JPS4917949A (en) 1974-02-16
CA1014614A (en) 1977-07-26
JPS5436286B2 (en) 1979-11-08
DE2328402C2 (en) 1984-10-31
DE2328402A1 (en) 1973-12-20
US3900790A (en) 1975-08-19
JPS4915944A (en) 1974-02-12
NL7307920A (en) 1973-12-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19930605