US3178701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analog-to-digital converting system
Assignee: General Electric Co
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Filing: 1962-05-14
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Granted: 1965-04-13
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Expires: 1982-05-14
Abstract
No abstract record available.
Inventors
- 👤 Frank J Woolam
- 👤 John N Wright
- 👤 Styrk G Reque
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:33
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/14; H03M1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
IN A SYSTEM FOR CONVERTING A D.C. ANALOG SIGNAL TO A DIGITALLY CODED WORD HAVING A NUMERICAL VALUE PROPORTIONAL TO THE AMPLITUDE OF SAID D.-C. ANALOG SIGNAL, THE COMBINATION COMPRISING: AN A.-C. REFERENCE SIGNAL SOURCE; FIRST MEANS COUPLED TO SAID A.-C. REFERENCE SIGNAL SOURCE FOR CONVERTING SAID D.-C. ANALOG SIGNAL TO AN AMPLITUDE-MODULATED CARRIER SIGNAL; A DIGITAL-TO-ANALOG CONVERTER INCLUDING A SECOND MEANS COUPLED TO SAID A.-C. REFERENCE SIGNAL SOURCE FOR CONVERTING A DIGITALLY CODED WORD TO AN A.-C. ANALOG SIGNAL IN ACCORDANCE WITH THE NUMERICAL VALUE OF THE DIGITALLY CODED WORD; SUMMING MEANS COUPLED TO SAID FIRST AND SECOND MEANS FOR PROVIDING A SIGNAL HAVING AN AMPLITUDE EQUAL TO THE DIFFERENCE BETWEEN THE AMPLITUDE OF THE MODULATED CARRIER SIGNAL AND THE AMPLITUDE OF SAID A.-C. ANALOG SIGNAL; AND CONTROL MEANS, INCLUDING A REGISTER FOR STORING SAID DIGITALLY CODED WORD, RESPONSIVE TO A DIFFERENT SIGNAL FROM SAID SUMMING MEANS FOR CAUSING SAID DIGITALLY CODED WORD STORED IN SAID REGISTER TO BE SO ALTERED AS TO CHANGE ITS NUMERICAL VALUE UNTIL THE DIFFERENCE SIGNAL REACHES A NULL AMPLITUDE CONDITION.
Claim 2
Dependent Claim
177 words
IN A SYSTEM FOR CONVERTING A D.C. ANALOG SIGNAL TO A DIGITALLY CODED WORD HAVING A NUMERICAL VALUE PROPORTIONAL TO THE AMPLITUDE OF SAID D.-C. ANALOG SIGNAL, THE COMBINATION COMPRISING: AN A.-C. REFERENCE SIGNAL SOURCE; FIRST MEANS COUPLED TO SAID A.-C. REFERENCE SIGNAL SOURCE FOR CONVERTING SAID D.-C. ANALOG SIGNAL TO AN AMPLITUDE-MODULATED CARRIER SIGNAL; A DIGITAL-TO-ANALOG CONVERTER INCLUDING A SECOND MEANS COUPLED TO SAID A.-C. REFERENCE SIGNAL SOURCE FOR CONVERTING A DIGITALLY CODED WORD TO AN A.-C. ANALOG SIGNAL IN ACCORDANCE WITH THE NUMERICAL VALUE OF THE DIGITALLY CODED WORD; SUMMING MEANS COUPLED TO SAID FIRST AND SECOND MEANS FOR PROVIDING A SIGNAL HAVING AN AMPLITUDE EQUAL TO THE DIFFERENCE BETWEEN THE AMPLITUDE OF THE MODULATED CARRIER SIGNAL AND THE AMPLITUDE OF SAID A.-C. ANALOG SIGNAL; AND CONTROL MEANS, INCLUDING A REGISTER FOR STORING SAID DIGITALLY CODED WORD, RESPONSIVE TO A DIFFERENT SIGNAL FROM SAID SUMMING MEANS FOR CAUSING SAID DIGITALLY CODED WORD STORED IN SAID REGISTER TO BE SO ALTERED AS TO CHANGE ITS NUMERICAL VALUE UNTIL THE DIFFERENCE SIGNAL REACHES A NULL AMPLITUDE CONDITION.
References Cited (Backward Citations)
US2988737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |