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US5064296A
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Integrated semiconductor circuit for thermal measurements
Assignee: BRONKHORST HIGH-TECH BV NIJVERHEIDSSTRAAT 1A NL- 7261 AK RUURLO
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Filing: 1990-06-22
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Granted: 1991-11-12
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Expires: 2010-06-22
Abstract
Abstract Integrated semiconductor circuit for thermal measurements, comprising at least a thermal signal comparator (8), the comparator (8) being provided with a signal feedback loop containing a DA signal converter (3), more specifically, the comparator (8) being a temperature or a heat current comparator, the DA signal-converter (3) comprising a thermal output and the signal feedback loop comprising components for the transfer of thermal signals.
Inventors
- 👤 Johan H. Huijsing
- 👤 Frank R. Riedijk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:45
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/68; G01F1/696; G01K; G01K17/00; G01K17/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
125 words
Integrated semiconductor circuit for measurements of thermal signals, comprising a thermal signal comparator (8) having a first thermal input, a second thermal input and an electrical digital output; a feedback loop connected between the output and the first input of the comparator, said feedback loop comprising a digital-analog (DA) signal converter (3) which provides an analog thermal output; an adder unit for heat currents having an output connected to a heat capacity having a temperature output connected to the first thermal input of said comparator; said feedback loop comprising a gating unit having a first input connected to the output of the comparator, a second input connected to a clock pulse and a digital electric output connected to the input of the digital-analog (DA) converter.
Claim 2
Dependent Claim
125 words
Integrated semiconductor circuit for measurements of thermal signals, comprising a thermal signal comparator (8) having a first thermal input, a second thermal input and an electrical digital output; a feedback loop connected between the output and the first input of the comparator, said feedback loop comprising a digital-analog (DA) signal converter (3) which provides an analog thermal output; an adder unit for heat currents having an output connected to a heat capacity having a temperature output connected to the first thermal input of said comparator; said feedback loop comprising a gating unit having a first input connected to the output of the comparator, a second input connected to a clock pulse and a digital electric output connected to the input of the digital-analog (DA) converter.
Claim 3
Dependent Claim
27 words
Integrated semiconductor circuit according to claim 1, wherein the adder unit comprises means for adding negative heat currents, and wherein the DA converter comprises a cooling element.
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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) | 1994-11-11 | 1995-05-13 | 1995-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-11 | 1999-05-13 | 1999-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-11 | 2003-05-13 | 2003-11-12 | $7700.00 | Window Closed / Lapsed |