Patent US3290673A successfully refreshed from Google Patents.
US3290673A
Expired / Lapsed
US
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Digital to analog converter using a solion cell
Assignee: 3M Co
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Filing: 1963-09-20
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Granted: 1966-12-06
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Expires: 1983-09-20
Abstract
No abstract record available.
Inventors
- 👤 Earl R Bullock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:32
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/10; F15B11/00; F15B11/08; F15B11/12; H; H03; H03M; H03M1/00; H03M1/66; H03M1/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
210 words
APPARATUS FOR CONVERTING A DIGITAL SIGNAL INTO AN ANALOG SIGNAL HAVING AN AMPLITUDE THAT IS PROPORTIONAL TO THE MAGNITUDE REPRESENTED BY SAID DIGITAL SIGNAL, SAID APPARATUS INCLUDING THE COMBINATION OF: STORAGE MEANS INCLUDING A SOLION CELL HAVING INPUT MEANS AND OUTPUT MEANS, SAID SOLION CELL BEING CONSTRUCTED TO RECEIVE THE DIGITAL SIGNAL AT ITS INTPUT MEANS AND ACCUMULATE A CHARGE PROPORTIONAL TO SAID DIGITAL SIGNAL AND TO MAINTAIN SAID CHARGE FOR AN EXTENDED PERIOD OF TIME WITHOUT ANY APPRECIABLE CHANGE IN THE CHARGE, SAID SOLION CELL BEING CONSTRUCTED TO PROVIDE AT ITS OUTPUT MEANS AN OUTPUT SIGNAL PROPORTIONAL TO THE CHARGE ACCUMULATED IN SAID SOLION CELL, AN INPUT CONNECTED TO RECEIVE SAID DIGITAL SIGNALS, SAID INPUT BEING INTERCONNECTED WITH THE INPUT MEANS OF SAID SOLION CELL FOR INTRODUCING SAID DIGITAL SIGNALS INTO SAID STORAGE MEANS, AN OUTPUT INTERCONNECTED WITH THE OUTPUT MEANS OF SAID SOLION CELL FOR PROVIDING AN OUTPUT SIGNAL THAT IS PROPORTIONAL TO THE CHARGE ACCUMULATED IN SAID STORAGE MEANS, AND CONTROL MEANS INTERCONNECTED WITH SAID OUTPUT AND WITH SAID INPUT MEANS AND RESPONSIVE TO THE OUTPUT SIGNAL TO VARY THE CHARGE ACCUMULATED IN THE STORAGE MEANS FOR MAINTAINING THE CHARGE IN THE STORAGE MEANS WITHIN PARTICULAR LIMITS WHEN SAID OUTPUT SIGNAL IS OUTSIDE OF SAID PARTICULAR LIMITS.
Claim 2
Dependent Claim
210 words
APPARATUS FOR CONVERTING A DIGITAL SIGNAL INTO AN ANALOG SIGNAL HAVING AN AMPLITUDE THAT IS PROPORTIONAL TO THE MAGNITUDE REPRESENTED BY SAID DIGITAL SIGNAL, SAID APPARATUS INCLUDING THE COMBINATION OF: STORAGE MEANS INCLUDING A SOLION CELL HAVING INPUT MEANS AND OUTPUT MEANS, SAID SOLION CELL BEING CONSTRUCTED TO RECEIVE THE DIGITAL SIGNAL AT ITS INTPUT MEANS AND ACCUMULATE A CHARGE PROPORTIONAL TO SAID DIGITAL SIGNAL AND TO MAINTAIN SAID CHARGE FOR AN EXTENDED PERIOD OF TIME WITHOUT ANY APPRECIABLE CHANGE IN THE CHARGE, SAID SOLION CELL BEING CONSTRUCTED TO PROVIDE AT ITS OUTPUT MEANS AN OUTPUT SIGNAL PROPORTIONAL TO THE CHARGE ACCUMULATED IN SAID SOLION CELL, AN INPUT CONNECTED TO RECEIVE SAID DIGITAL SIGNALS, SAID INPUT BEING INTERCONNECTED WITH THE INPUT MEANS OF SAID SOLION CELL FOR INTRODUCING SAID DIGITAL SIGNALS INTO SAID STORAGE MEANS, AN OUTPUT INTERCONNECTED WITH THE OUTPUT MEANS OF SAID SOLION CELL FOR PROVIDING AN OUTPUT SIGNAL THAT IS PROPORTIONAL TO THE CHARGE ACCUMULATED IN SAID STORAGE MEANS, AND CONTROL MEANS INTERCONNECTED WITH SAID OUTPUT AND WITH SAID INPUT MEANS AND RESPONSIVE TO THE OUTPUT SIGNAL TO VARY THE CHARGE ACCUMULATED IN THE STORAGE MEANS FOR MAINTAINING THE CHARGE IN THE STORAGE MEANS WITHIN PARTICULAR LIMITS WHEN SAID OUTPUT SIGNAL IS OUTSIDE OF SAID PARTICULAR LIMITS.
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |