US3356955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital automatic time domain equalizer
Assignee: International Business Machines Corp
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Filing: 1964-05-22
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Granted: 1967-12-05
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Expires: 1984-05-22
Abstract
No abstract record available.
Inventors
- 👤 William S Mohn
- 👤 Larry L Stickler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:22
CPC Classifications
H; H04; H04L; H04L7/00; H04L7/0054; H04L7/0062; H03; H03K; H03K5/00; H03K5/01; H04L25/00; H04L25/02; H04L25/03; H04L25/03006; H04L25/03012; H04L25/03114; H04L25/03133
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
213 words
A DEVICE FOR REDUCING INTER SYMBOL INTERFERENCE IN A DIGITAL DATA TRANSMISSION SYSTEM COMPRISING A REGISTER HAVING A PLURALITY OF STAGES AND RESPONSIVE TO A CLOCK SIGNAL TO STORE AN INPUT IN A FIRST OF SAID STAGES AND TO OPERATE EACH OTHER STAGE TO RECEIVE THE CONTENTS OF THE PRECEDING STAGE; MEANS FOR SUPPLYING TO SAID REGISTER FIRST STAGE A DIGITAL INPUT REPRESENTING THE AMPLITUDE OF AN INPUT WAVEFORM; MEANS FOR SUPPLYING CLOCK SIGNALS TO SAID AMPLITUDE STORING REGISTER IN SUBSTANTIALLY A PREDETERMINED PHASE RELATIONSHIP TO CLOCK TIMES ON THE INPUT WAVEFORM WHEREBY SAID REGISTER IS GIVEN AT EACH CLOCK TIME A SEQUENCE OF VALUES SIMULTANEOUSLY REPRESENTING THE AMPLITUDE OF A PLURALITY OF POINTS ON THE INPUT WAVEFORM AND SAID VALUES ARE ADVANCED THROUGH THE REGISTER DURING TRANSMISSION OF DATA ON THE SYSTEM; A GAINS REGISTER HAVING A PLURALITY OF STAGES CORRESPONDING TO THE STAGES OF SAID AMPLITUDE REGISTER; AND MEANS CONNECTED TO BE RESPONSIVE TO THE CONTENTS OF EACH AMPLITUDE REGISTER STAGE DURING EACH CLOCK TIME AND TO THE CORRESPONDING STAGE OF SAID GAINS REGISTER TO FORM A SINGLE POINT OF AN OUTPUT WAVEFORM THAT IS A FUNCTION OF THE POINTS ON THE INPUT WAVEFORM REPRESENTED BY SAID AMPLITUDE REGISTER AND THE VALUES STORED IN THE CORRESPONDING STAGE OF SAID GAINS REGISTER.
Claim 2
Independent Claim
213 words
A DEVICE FOR REDUCING INTER SYMBOL INTERFERENCE IN A DIGITAL DATA TRANSMISSION SYSTEM COMPRISING A REGISTER HAVING A PLURALITY OF STAGES AND RESPONSIVE TO A CLOCK SIGNAL TO STORE AN INPUT IN A FIRST OF SAID STAGES AND TO OPERATE EACH OTHER STAGE TO RECEIVE THE CONTENTS OF THE PRECEDING STAGE; MEANS FOR SUPPLYING TO SAID REGISTER FIRST STAGE A DIGITAL INPUT REPRESENTING THE AMPLITUDE OF AN INPUT WAVEFORM; MEANS FOR SUPPLYING CLOCK SIGNALS TO SAID AMPLITUDE STORING REGISTER IN SUBSTANTIALLY A PREDETERMINED PHASE RELATIONSHIP TO CLOCK TIMES ON THE INPUT WAVEFORM WHEREBY SAID REGISTER IS GIVEN AT EACH CLOCK TIME A SEQUENCE OF VALUES SIMULTANEOUSLY REPRESENTING THE AMPLITUDE OF A PLURALITY OF POINTS ON THE INPUT WAVEFORM AND SAID VALUES ARE ADVANCED THROUGH THE REGISTER DURING TRANSMISSION OF DATA ON THE SYSTEM; A GAINS REGISTER HAVING A PLURALITY OF STAGES CORRESPONDING TO THE STAGES OF SAID AMPLITUDE REGISTER; AND MEANS CONNECTED TO BE RESPONSIVE TO THE CONTENTS OF EACH AMPLITUDE REGISTER STAGE DURING EACH CLOCK TIME AND TO THE CORRESPONDING STAGE OF SAID GAINS REGISTER TO FORM A SINGLE POINT OF AN OUTPUT WAVEFORM THAT IS A FUNCTION OF THE POINTS ON THE INPUT WAVEFORM REPRESENTED BY SAID AMPLITUDE REGISTER AND THE VALUES STORED IN THE CORRESPONDING STAGE OF SAID GAINS REGISTER.
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) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |