US4965510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated semiconductor circuit
Assignee: Siemens AG
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Filing: 1989-01-17
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Granted: 1990-10-23
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Expires: 2009-01-17
Abstract
Abstract Integrated semiconductor circuit, including a control loop including a first current source acting as an actual value transmitter for the control loop, and a final control element acting on the first current source as a control, the first current source being in the form of a current mirror having a plurality of transistors each forming an output part driving a respective load element, and a second constant current source being independent of the first current source and acting as a desired value transmitter for the control loop.
Inventors
- 👤 Hans Kriedt
- 👤 Andreas Dietze
- 👤 Josef Fenk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:56
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/08; G05F3/10; G05F3/16; G05F3/20; G05F3/22; G05F3/222
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
210 words
Integrated semiconductor circuit, comprising a control loop including a first current source acting as an actual value transmitter for said control loop, and final control means acting on said actual value transmitter as a control, said actual value transmitter being in the form of a current mirror having a plurality of transistors each forming an output part driving a respective load element, and a second constant current source being independent of said first current source and acting as a desired value transmitter for said control loop, wherein said current mirror of said actual value transmitter and said desired value transmitter each include first and second transistors of a given conductivity type having emitter-collector paths, said first transistor of said current mirror being connected as a diode, and said desired value transmitter and said actual value transmitter each includes a current mirror having third and fourth transistors of a conductivity type being opposite said given type and having emitter-collector paths, said third transistor of said current mirror of said desired value transmitter and said actual value transmitter being connected as a diode, the collector-emitter paths of said first and fourth transistors being connected together in series, and the collector-emitter paths of said second and third transistors being connected together in series.
Claim 2
Dependent Claim
210 words
Integrated semiconductor circuit, comprising a control loop including a first current source acting as an actual value transmitter for said control loop, and final control means acting on said actual value transmitter as a control, said actual value transmitter being in the form of a current mirror having a plurality of transistors each forming an output part driving a respective load element, and a second constant current source being independent of said first current source and acting as a desired value transmitter for said control loop, wherein said current mirror of said actual value transmitter and said desired value transmitter each include first and second transistors of a given conductivity type having emitter-collector paths, said first transistor of said current mirror being connected as a diode, and said desired value transmitter and said actual value transmitter each includes a current mirror having third and fourth transistors of a conductivity type being opposite said given type and having emitter-collector paths, said third transistor of said current mirror of said desired value transmitter and said actual value transmitter being connected as a diode, the collector-emitter paths of said first and fourth transistors being connected together in series, and the collector-emitter paths of said second and third transistors being connected together in series.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |