EP0443238A3 - Precision switched current source - Google Patents

Precision switched current source Download PDF

Info

Publication number: EP0443238A3
Authority: EP; European Patent Office
Prior art keywords: current source; switched current; precision switched; precision; source
Prior art date: 1990-02-20
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 Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Withdrawn

Application number

EP19900309885

Other versions

EP0443238A2 (en

Inventor

Douglas S. Smith

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.)

Precision Monolithics Inc

Original Assignee

Precision Monolithics Inc

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.)

1990-02-20

Filing date

1990-09-10

Publication date

1992-01-08

1990-09-10 Application filed by Precision Monolithics Inc filed Critical Precision Monolithics Inc

1991-08-28 Publication of EP0443238A2 publication Critical patent/EP0443238A2/en

1992-01-08 Publication of EP0443238A3 publication Critical patent/EP0443238A3/en

Status Withdrawn legal-status Critical Current

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

Landscapes

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

EP19900309885 1990-02-20 1990-09-10 Precision switched current source Withdrawn EP0443238A3 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US48231990A	1990-02-20	1990-02-20
US482319		1990-02-20

Publications (2)

Publication Number	Publication Date
EP0443238A2 EP0443238A2 (en)	1991-08-28
EP0443238A3 true EP0443238A3 (en)	1992-01-08

Family

ID=23915600

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP19900309885 Withdrawn EP0443238A3 (en)	1990-02-20	1990-09-10	Precision switched current source

Country Status (2)

Country	Link
EP (1)	EP0443238A3 (en)
JP (1)	JPH03252217A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US10193507B1 (en)	2017-07-31	2019-01-29	Analog Devices Global	Current switching circuit

Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3973215A (en) *	1975-08-04	1976-08-03	Rca Corporation	Current mirror amplifier
JPS58186817A (en) *	1982-04-24	1983-10-31	Nippon Denso Co Ltd	Constant current control circuit
GB2131640A (en) *	1982-12-01	1984-06-20	Plessey Co Plc	Switching circuit
US4518921A (en) *	1982-10-18	1985-05-21	At&T Bell Laboratories	Track and hold circuit
US4544878A (en) *	1983-10-04	1985-10-01	At&T Bell Laboratories	Switched current mirror
US4814644A (en) *	1985-01-29	1989-03-21	K. Ushiku & Co.	Basic circuitry particularly for construction of multivalued logic systems

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS5656036A (en) *	1979-10-12	1981-05-16	Hitachi Ltd	Pulse driving circuit
JPH01128616A (en) *	1987-11-13	1989-05-22	Fujitsu Ltd	current switch circuit

1990
- 1990-09-10 EP EP19900309885 patent/EP0443238A3/en not_active Withdrawn
- 1990-10-22 JP JP2284118A patent/JPH03252217A/en active Pending

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3973215A (en) *	1975-08-04	1976-08-03	Rca Corporation	Current mirror amplifier
JPS58186817A (en) *	1982-04-24	1983-10-31	Nippon Denso Co Ltd	Constant current control circuit
US4518921A (en) *	1982-10-18	1985-05-21	At&T Bell Laboratories	Track and hold circuit
GB2131640A (en) *	1982-12-01	1984-06-20	Plessey Co Plc	Switching circuit
US4544878A (en) *	1983-10-04	1985-10-01	At&T Bell Laboratories	Switched current mirror
US4814644A (en) *	1985-01-29	1989-03-21	K. Ushiku & Co.	Basic circuitry particularly for construction of multivalued logic systems

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 8, no. 33 (P-254)(1470) 14 February 1984 & JP-A-58 186 817 ( NIPPON DENSO K.K. ) 31 October 1983 *

Also Published As

Publication number	Publication date
EP0443238A2 (en)	1991-08-28
JPH03252217A (en)	1991-11-11

Publication	Publication Date	Title
GB2248357B (en)	1994-07-06	Source voltage control circuit
EP0490639A3 (en)	1993-03-24	Switching power source
GB2247787B (en)	1994-06-29	Linear direct current motor
HK1000060A1 (en)	1997-10-31	Low amperage microfuse
EP0453187A3 (en)	1992-04-15	Distributed source assembly
EP0524558A3 (en)	1993-06-09	Superluminescent optical source
EP0483852A3 (en)	1992-08-26	Power source circuit
HK59797A (en)	1997-05-16	Current source circuit
EP0440245A3 (en)	1991-11-21	Power source circuit
GB8921799D0 (en)	1989-11-08	Current mirror
EP0458170A3 (en)	1992-04-22	Chuck
EP0485973A3 (en)	1992-07-08	Switching constant current source circuit
EP0462377A3 (en)	1992-05-13	Ion source
GB2236426B (en)	1994-01-26	Laser source
EP0464498A3 (en)	1992-03-04	Current lead
IL94726A (en)	1997-02-18	Power source
GB9025903D0 (en)	1991-01-09	Saddle-joint jig
EP0481277A3 (en)	1993-01-13	Current source
AU6970591A (en)	1991-09-18	Alternative current source for welding
EP0443238A3 (en)	1992-01-08	Precision switched current source
RU1821879C (en)	1993-06-15	D c voltage source
HK79794A (en)	1994-08-19	Current source technology
CS173590A2 (en)	1991-11-12	Impulse current source
RU1821912C (en)	1993-06-15	Current former
RU1821799C (en)	1993-06-15	Stabilized current ferroresonant source

Legal Events

Date	Code	Title	Description
1991-07-12	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1991-08-28	AK	Designated contracting states	Kind code of ref document: A2 Designated state(s): DE FR GB IT NL
1991-11-20	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1992-01-08	AK	Designated contracting states	Kind code of ref document: A3 Designated state(s): DE FR GB IT NL
1993-01-26	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN
1993-03-17	18D	Application deemed to be withdrawn	Effective date: 19920708