US3218633A
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Assignee: General Precision Inc
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Filing: 1963-06-12
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Granted: 1965-11-16
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Expires: 1983-06-12
Abstract
No abstract record available.
Inventors
- 👤 David A Weinstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:33
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
186 words
AN ANALOG TO DIGITAL CONVERTER COMPRISING, (A) AN ANALOG INPUT SIGNAL; (B) A DIGITAL REGISTER FOR STORING DIGITAL NUMBERS; (C) A CONSTANT CURRENT SOURCE; (D) A PLURALITY OF RESISTORS; (E) FIRST CIRCUIT MEANS ELECTRICALLY CONNECTING ALL OF SAID PLURALITY OF RESISTORS AND SAID CURRENT SOURCE IN SERIES; (F) SECOND CIRCUIT MEANS COUPLED TO SAID DIGITAL REGISTER AND RESPONSIVE TO THE DIGITAL NUMBER STORED THEREIN FOR REMOVING SELECTED ONES OF SAID PLURALITY OF RESISTORS FROM SAID SERIES CONNECTION TO PROVIDE A KNOWN ANALOG VOLTAGE COMMENSURATE WITH THE VALUE OF SAID DIGITAL NUMBER; (G) THIRD CIRCUIT MEANS ELECTRICALLY CONNECTING SAID ANALOG INPUT SIGNAL AND SAID KNOWN ANALOG VOLTAGE IN SERIES OF PROVIDE A DIFFERENCE SIGNAL WHEN THE MAGNITUDES OF SAID SIGNALS ARE UNEQUAL; (H) FOURTH CIRCUIT MEANS RESPONSIVE TO SAID DIFFERENCE SIGNAL AND OPERABLE TO DECREASE THE MAGNITUDE OF SAID NUMBER STORED IN SAID REGISTER DURING EACH OF A SEQUENCE OF TIME INTERVALS ONLY WHEN SAID DIFFERENCE SIGNAL IS OF A FIRST POLARITY; AND (I) FIFTH CIRCUIT MEANS OPERABLE DURING EACH OF SAID SEQUENCE OF TIME INTERVALS TO INCREASE THE MAGNITUDE OF SAID NUMBER STORED IN SAID REGISTER.
Claim 2
Dependent Claim
186 words
AN ANALOG TO DIGITAL CONVERTER COMPRISING, (A) AN ANALOG INPUT SIGNAL; (B) A DIGITAL REGISTER FOR STORING DIGITAL NUMBERS; (C) A CONSTANT CURRENT SOURCE; (D) A PLURALITY OF RESISTORS; (E) FIRST CIRCUIT MEANS ELECTRICALLY CONNECTING ALL OF SAID PLURALITY OF RESISTORS AND SAID CURRENT SOURCE IN SERIES; (F) SECOND CIRCUIT MEANS COUPLED TO SAID DIGITAL REGISTER AND RESPONSIVE TO THE DIGITAL NUMBER STORED THEREIN FOR REMOVING SELECTED ONES OF SAID PLURALITY OF RESISTORS FROM SAID SERIES CONNECTION TO PROVIDE A KNOWN ANALOG VOLTAGE COMMENSURATE WITH THE VALUE OF SAID DIGITAL NUMBER; (G) THIRD CIRCUIT MEANS ELECTRICALLY CONNECTING SAID ANALOG INPUT SIGNAL AND SAID KNOWN ANALOG VOLTAGE IN SERIES OF PROVIDE A DIFFERENCE SIGNAL WHEN THE MAGNITUDES OF SAID SIGNALS ARE UNEQUAL; (H) FOURTH CIRCUIT MEANS RESPONSIVE TO SAID DIFFERENCE SIGNAL AND OPERABLE TO DECREASE THE MAGNITUDE OF SAID NUMBER STORED IN SAID REGISTER DURING EACH OF A SEQUENCE OF TIME INTERVALS ONLY WHEN SAID DIFFERENCE SIGNAL IS OF A FIRST POLARITY; AND (I) FIFTH CIRCUIT MEANS OPERABLE DURING EACH OF SAID SEQUENCE OF TIME INTERVALS TO INCREASE THE MAGNITUDE OF SAID NUMBER STORED IN SAID REGISTER.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |