Patent US3275847A successfully refreshed from Google Patents.
US3275847A
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Transistorized saw-tooth wave generators utilizing direct current negative feedback
Assignee: BAE Systems Electronics Ltd
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Filing: 1963-09-12
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Granted: 1966-09-27
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Expires: 1983-09-12
Abstract
No abstract record available.
Inventors
- 👤 Kitchin Harry Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:34
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/48; H03K4/60; H03K4/69; H03K4/72; H03F; H03F1/00; H03F1/30; H03F1/302; H03K4/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A SAWTOOTH GENERATOR COMPRSISING A FIRST CAPACITOR, FIRST TRANSISTOR MEANS COUPLED TO SAID FIRST CAPACITOR TO APPLY A SUBSTANTIALLY CONSTANT CHARGING CURRENT THERETO AND THUS TO PRODUCE A LINEARLY RISING VOLTAGE THEREACROSS, MEANS COUPLED TO SAID FIRST CAPACITOR TO PERIODICALLY DISCHARGE SAID FIRST CAPACITOR AND THUS TO PRODUCE A TIME SEQUENCE OF LINEARLY RISING AND FALLING VOLTAGES THEREACROSS, SECOND TRANSISTOR MEANS COUPLED TO SAID FIRST CA-
Claim 2
Dependent Claim
66 words
A SAWTOOTH GENERATOR COMPRSISING A FIRST CAPACITOR, FIRST TRANSISTOR MEANS COUPLED TO SAID FIRST CAPACITOR TO APPLY A SUBSTANTIALLY CONSTANT CHARGING CURRENT THERETO AND THUS TO PRODUCE A LINEARLY RISING VOLTAGE THEREACROSS, MEANS COUPLED TO SAID FIRST CAPACITOR TO PERIODICALLY DISCHARGE SAID FIRST CAPACITOR AND THUS TO PRODUCE A TIME SEQUENCE OF LINEARLY RISING AND FALLING VOLTAGES THEREACROSS, SECOND TRANSISTOR MEANS COUPLED TO SAID FIRST CA-
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |