US4906834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared detector circuit having a resistor series connected to the detector to limit the current across the pn junction of the FET
Assignee: Heimann GmbH
•
Filing: 1988-10-12
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Granted: 1990-03-06
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Expires: 2008-10-12
Abstract
Abstract A circuit for an infrared detector includes a field effect transistor and a gate resistor connected thereto. A current-limiting component, preferably an ohmic resistor, is connected in series with the detector element between the gate of the field effect transistor and ground, to limit the current across the pn junction of the field effect transistor.
Inventors
- 👤 Reiner Quad
- 👤 Udo Ringelstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:08
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/10; G01J5/34; G01J5/35
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
48 words
A circuit comprising: an infrared detector element; a field effect transistor having a gate; a gate resistor connected to said gate of said field effect transistor; and a current-limiting component connected in series with said infrared detector element between said gate of said field effect transistor and ground.
Claim 2
Dependent Claim
48 words
A circuit comprising: an infrared detector element; a field effect transistor having a gate; a gate resistor connected to said gate of said field effect transistor; and a current-limiting component connected in series with said infrared detector element between said gate of said field effect transistor and ground.
Claim 3
Dependent Claim
39 words
A circuit as claimed in claim 1, wherein said current-limiting component is high-impedance resistor. 3. A circuit as claimed in claim 2, wherein said high-impedance resistor has a resistance value in the range between 100 kOhm and 100 Mohm.
Claim 4
Dependent Claim
24 words
A circuit as claimed in claim 2, wherein said high-impedance resistor has a resistance value in the range between 100 kOhm and 100 Mohm.
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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) | 1993-03-05 | 1993-09-04 | 1994-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-05 | 1997-09-04 | 1998-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-05 | 2001-09-04 | 2002-03-06 | $7700.00 | Window Closed / Lapsed |