US3239694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bi-level threshold setting circuit
Assignee: North American Aviation Corp
•
Filing: 1963-09-25
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Granted: 1966-03-08
•
Expires: 1983-09-25
Abstract
No abstract record available.
Inventors
- 👤 Rovell Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:16
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/286; H03K3/2893; H03K3/2897
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A THRESHOLD SETTING CIRCUIT COMPRISING A VOLTAGE COMPARATOR HAVING TWO INPUT TERMINALS AND AN OUTPUT TERMINAL, MEANS FOR APPLYING A REFERENCE VOLTAGE OF A PRESELECTED FIRST LEVEL AND POLARITY TO ONE OF SAID INPUT TERMINALS, MEANS FOR APPLYING A VOLTAGE SIGNAL TO THE OTHER OF SAID INPUT TERMINALS FOR COMPARISON WITH A REFERENCE VOLTAGE, AND MEANS COUPLED TO THE OUTPUT TERMINAL OF SAID COMPARATOR FOR SWITCHING SAID REFERENCE VOLTAGE TO A PRESELECTED SECOND LEVEL OF OPPOSITE POLARITY FROM SAID FIRST LEVEL WHEN SAID COMPARATOR DETECTS THAT SAID VOLTAGE SIGNAL EXCEEDS SAID PRESELECTED FIRST LEVEL IN A GIVEN SENSE, AND FOR RETURNING SAID REFERENCE VOLTAGE TO SAID PRESELECTED FIRST LEVEL WHEN SAID COMPARATOR DETECTS THAT SAID VOLTAGE SIGNAL EXCEEDS SAID PRESELECTED SECOND LEVEL IN AN OPPOSITE SENSE.
Claim 2
Dependent Claim
126 words
A THRESHOLD SETTING CIRCUIT COMPRISING A VOLTAGE COMPARATOR HAVING TWO INPUT TERMINALS AND AN OUTPUT TERMINAL, MEANS FOR APPLYING A REFERENCE VOLTAGE OF A PRESELECTED FIRST LEVEL AND POLARITY TO ONE OF SAID INPUT TERMINALS, MEANS FOR APPLYING A VOLTAGE SIGNAL TO THE OTHER OF SAID INPUT TERMINALS FOR COMPARISON WITH A REFERENCE VOLTAGE, AND MEANS COUPLED TO THE OUTPUT TERMINAL OF SAID COMPARATOR FOR SWITCHING SAID REFERENCE VOLTAGE TO A PRESELECTED SECOND LEVEL OF OPPOSITE POLARITY FROM SAID FIRST LEVEL WHEN SAID COMPARATOR DETECTS THAT SAID VOLTAGE SIGNAL EXCEEDS SAID PRESELECTED FIRST LEVEL IN A GIVEN SENSE, AND FOR RETURNING SAID REFERENCE VOLTAGE TO SAID PRESELECTED FIRST LEVEL WHEN SAID COMPARATOR DETECTS THAT SAID VOLTAGE SIGNAL EXCEEDS SAID PRESELECTED SECOND LEVEL IN AN OPPOSITE SENSE.
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |