US3147434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for measuring the time symmetry of waveform polarity
Assignee: AT&T Inc
•
Filing: 1960-09-27
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Granted: 1964-09-01
•
Expires: 1980-09-27
Abstract
No abstract record available.
Inventors
- 👤 John T Cocker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:53
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/24; H04L1/248
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A MEASURING SET FOR DETERMINING THE SYMMETRY OF THE WAVEFORM OF AN INPUT SIGNAL COMPRISING, IN COMBINATION, A SOURCE OF A FIXED REFERENCE VOLTAGE OF POSITIVE POLARITY, A CURRENT SOURCE, GATING MEANS HAVING AN INPUT CONNECTED TO RECEIVE SAID INPUT SIGNAL AND AN OUTPUT CONNECTED TO SAID CURRENT SOURCE TO ACTUATE SAID CURRENT SOURCE WHEN SAID INPUT SIGNAL IS MORE POSITIVE THAN SAID FIXED REFERENCE VOLTAGE, A SOURCE OF A SECOND FIXED REFERENCE VOLTAGE OF NEGATIVE POLARITY, A SECOND CURRENT SOURCE, SECOND GATING MEANS HAVING AN INPUT CONNECTED TO RECEIVE SAID INPUT SIGNAL AND AN OUTPUT CONNECTED TO SAID SECOND CURRENT SOURCE TO ACTUATE SAID SECOND CURRENT SOURCE WHEN SAID INPUT SIGNAL IS MORE NEGATIVE THAN SAID SECOND REFERENCE VOLTAGE WHEREBY THE CURRENTS GENERATED BY SAID FIRST AND SAID SECOND CURRENT SOURCES ARE RESPECTIVELY PROPORTIONAL TO THE PERCENT OF TIME SAID INPUT SIGNAL IS OF POSITIVE POLARITY AND OF NEGATIVE POLARITY.
Claim 2
Dependent Claim
151 words
A MEASURING SET FOR DETERMINING THE SYMMETRY OF THE WAVEFORM OF AN INPUT SIGNAL COMPRISING, IN COMBINATION, A SOURCE OF A FIXED REFERENCE VOLTAGE OF POSITIVE POLARITY, A CURRENT SOURCE, GATING MEANS HAVING AN INPUT CONNECTED TO RECEIVE SAID INPUT SIGNAL AND AN OUTPUT CONNECTED TO SAID CURRENT SOURCE TO ACTUATE SAID CURRENT SOURCE WHEN SAID INPUT SIGNAL IS MORE POSITIVE THAN SAID FIXED REFERENCE VOLTAGE, A SOURCE OF A SECOND FIXED REFERENCE VOLTAGE OF NEGATIVE POLARITY, A SECOND CURRENT SOURCE, SECOND GATING MEANS HAVING AN INPUT CONNECTED TO RECEIVE SAID INPUT SIGNAL AND AN OUTPUT CONNECTED TO SAID SECOND CURRENT SOURCE TO ACTUATE SAID SECOND CURRENT SOURCE WHEN SAID INPUT SIGNAL IS MORE NEGATIVE THAN SAID SECOND REFERENCE VOLTAGE WHEREBY THE CURRENTS GENERATED BY SAID FIRST AND SAID SECOND CURRENT SOURCES ARE RESPECTIVELY PROPORTIONAL TO THE PERCENT OF TIME SAID INPUT SIGNAL IS OF POSITIVE POLARITY AND OF NEGATIVE POLARITY.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |