Patent US5801688A successfully refreshed from Google Patents.
Patent US3299782A successfully refreshed from Google Patents.
Patent US5170240A successfully refreshed from Google Patents.
US5170240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Input protection structure for integrated circuits
Assignee: Siemens AG
•
Filing: 1991-09-30
•
Granted: 1992-12-08
•
Expires: 2011-09-30
Abstract
Abstract An input protection structure for integrated circuits is connected in a semiconductor substrate between an input and an output for a reference potential. The input protection structure includes a first transistor acting as an input transistor and a second transistor acting as a trigger transistor. The input transistor and the trigger transistor are connected in a cascade. The input transistor and the trigger transistor have a common collector forming the input of the protection structure. The input transistor has an emitter connected to the output for the reference potential. An oxide isolation is provided for adjacent components.
Inventors
- 👤 Burkhard Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:42
CPC Classifications
H; H10; H10D; H10D89/00; H10D89/60
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
92 words
An input protection structure for integrated circuits connected in a semiconductor substrate between an input to be protected and an output for a reference potential, comprising a first transistor acting as an input transistor, a second transistor acting as a control transistor, said input transistor and said control transistor being connected in a cascade, said input transistor and said control transistor having a common collector forming the input of the protection structure, said input transistor having an emitter connected to the output for the reference potential, and oxide isolation for adjacent components.
Claim 2
Dependent Claim
92 words
An input protection structure for integrated circuits connected in a semiconductor substrate between an input to be protected and an output for a reference potential, comprising a first transistor acting as an input transistor, a second transistor acting as a control transistor, said input transistor and said control transistor being connected in a cascade, said input transistor and said control transistor having a common collector forming the input of the protection structure, said input transistor having an emitter connected to the output for the reference potential, and oxide isolation for adjacent components.
Claim 3
Dependent Claim
16 words
The input protection structure according to claim 1, wherein said control transistor has a floating base.
Claim 4
Dependent Claim
24 words
The input protection structure according to claim 1, including an integrated resistor through which the base of said control transistor is connected to ground.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-08 | 1996-06-08 | 1996-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-08 | 2000-06-08 | 2000-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-08 | 2004-06-08 | 2004-12-08 | $7700.00 | Window Closed / Lapsed |