US3234544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bi-polar analog-to-digital converter
Assignee: Control Data Corp
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Filing: 1960-06-10
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Granted: 1966-02-08
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Expires: 1980-06-10
Abstract
No abstract record available.
Inventors
- 👤 Pete E Marenholtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:40
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
IN A FEEDBACK TYPE OF ANALOG-TO -DIGITAL CONVERTER FOR CONVERTING AN ANALOG INPUT SIGNAL TO A DIGITAL SIGNAL REPRESENTATION THEREOF IN TERMS OF ABSOLUTE VALUE AND SIGN, INCLUDING A DIGITAL REGISTER HAVING A PLURALITY OF BINARY STAGES FOR STORING SAID DIGITAL SIGNAL REPRESENTATION, EACH OF SAID STAGES HAVING A NORMAL AND A BINARY COMPLEMENT OUTPUT, THE COMBINATION OF: A DIGITAL-TO-ANALOG CONVERTER, MEANS RESPONSIVE TO THE SIGN STAGE OF SAID REGISTER AND TO SAID DIGITAL-TO-ANOLOG CONVERTER FOR DETERMINING THE SIGN OF THE INPUT SIGNAL, MEANS RESPONSIVE TO SAID SIGN STAGE FOR SELECTIVELY COUPLING THE NORMAL OUTPUT AND THE BINARY COMPLEMENT OUTPUT OF EACH OF SAID STAGES OTHER THAN SAID SIGN STAGE TO SAID DIGITAL-TO ANALOG CONVERTER, MEANS FOR SEQUENTIALLY SETTING EACH OF SAID STAGES TO REPRESENT A BINARY ONE, AND MEANS RESPONSIVE TO SAID SIGN STAGE AND TO SAID DIGITAL-TO-ANALOG CONVERTER FOR CONDITIONALLY RESETTING EACH OF SAID STAGES IN SEQUENCES TO REPRESENT A BINARY ZERO IF THE SIGNAL PRODUCED BY SAID DIGITAL-TO-ANALOG CONVERTER HAS AN ABSOLUTE VALUE GREATER IN MAGNITUDE THAN THE ABSOLUTE VALUE OF SAID INPUT SIGNAL.
Claim 2
Dependent Claim
177 words
IN A FEEDBACK TYPE OF ANALOG-TO -DIGITAL CONVERTER FOR CONVERTING AN ANALOG INPUT SIGNAL TO A DIGITAL SIGNAL REPRESENTATION THEREOF IN TERMS OF ABSOLUTE VALUE AND SIGN, INCLUDING A DIGITAL REGISTER HAVING A PLURALITY OF BINARY STAGES FOR STORING SAID DIGITAL SIGNAL REPRESENTATION, EACH OF SAID STAGES HAVING A NORMAL AND A BINARY COMPLEMENT OUTPUT, THE COMBINATION OF: A DIGITAL-TO-ANALOG CONVERTER, MEANS RESPONSIVE TO THE SIGN STAGE OF SAID REGISTER AND TO SAID DIGITAL-TO-ANOLOG CONVERTER FOR DETERMINING THE SIGN OF THE INPUT SIGNAL, MEANS RESPONSIVE TO SAID SIGN STAGE FOR SELECTIVELY COUPLING THE NORMAL OUTPUT AND THE BINARY COMPLEMENT OUTPUT OF EACH OF SAID STAGES OTHER THAN SAID SIGN STAGE TO SAID DIGITAL-TO ANALOG CONVERTER, MEANS FOR SEQUENTIALLY SETTING EACH OF SAID STAGES TO REPRESENT A BINARY ONE, AND MEANS RESPONSIVE TO SAID SIGN STAGE AND TO SAID DIGITAL-TO-ANALOG CONVERTER FOR CONDITIONALLY RESETTING EACH OF SAID STAGES IN SEQUENCES TO REPRESENT A BINARY ZERO IF THE SIGNAL PRODUCED BY SAID DIGITAL-TO-ANALOG CONVERTER HAS AN ABSOLUTE VALUE GREATER IN MAGNITUDE THAN THE ABSOLUTE VALUE OF SAID INPUT SIGNAL.
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) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |