US3412338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: International Business Machines Corp
•
Filing: 1965-10-15
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Granted: 1968-11-19
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Expires: 1985-10-15
Abstract
No abstract record available.
Inventors
- 👤 Bernstein Ralph
- 👤 Winslow R Remley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:53
CPC Classifications
H; H03; H03H; H03H17/00; H03H17/02; H03H17/0294; G; G01; G01R; G01R23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
208 words
A CIRCUIT FOR FILTERING A PRESELECTED COMPONENT SIGNAL OF FREQUENCY 1/T FROM AN INPUT SIGNAL COMPRISING: SAMPLING MEANS FOR PERIODICALLY SAMPING THE INPUT SIGNAL AT A SAMPLING FREQUENCY 1/T; SAID SAMPLING MEANS INCLUDING, ANALOG-TO-DIGITAL CONVERTER MEANS AND, ANGLE CONTROL MEANS CONNECTED TO SAID CONVERTER MEANS SO AS TO CAUSE SAID CONVERTER MEANS TO DERIVE PERIODIC FIRST SAMPLES FROM SAID INPUT SIGNAL WHEN SAID COMPONENT SIGNAL IS AT A FIRST ANGLE AND TO DERIVE PERIODIC SECOND SAMPLES FROM SAID INPUT SIGNAL WHEN SAID COMPONENT SIGNAL IS AT A SECOND ANGLE; DIGITAL COHERENT INTEGRATING MEANS SERIALLY CONNECTED TO THE SAMPLING MEANS FOR COHERENTLY INTEGRATING SAID FIRST AND SECOND SAMPLES UTILIZING AN INTEGRATION STORAGE TIME T SO AS TO FORM INTEGRATED FIRST AND SECOND SAMPLES, RESPECTIVELY; RECTIFYING MEANS CONNECTED TO THE COHERENT INTEGRATING MEANS FOR RECTIFYING SAID INTEGRATED FIRST AND SECOND SAMPLES TO FORM RECTIFIED FIRST AND SECOND SAMPLES, RESPECTIVELY; AND SUMMING MEANS CONNECTED TO THE RECTIFYING MEANS FOR SUMMING SAID RECTIFIED FIRST AND SECOND SAMPLES, AN OUTPUT SIGNAL BEING FORMED BY THE SUMMING MEANS WHICH HAS A MAGNITUDE WHICH IS SUBSTANTIALLY INDEPENDENT OF THE ANGLE OF SAID COMPONENT SIGNAL; SAID OUTPUT SIGNAL THEREBY BEING INDICATIVE OF THE AMPLITUDE OF THAT COMPONENT SIGNAL IN THE INPUT SIGNAL HAVING A FREQUENCY 1/T.
Claim 2
Dependent Claim
208 words
A CIRCUIT FOR FILTERING A PRESELECTED COMPONENT SIGNAL OF FREQUENCY 1/T FROM AN INPUT SIGNAL COMPRISING: SAMPLING MEANS FOR PERIODICALLY SAMPING THE INPUT SIGNAL AT A SAMPLING FREQUENCY 1/T; SAID SAMPLING MEANS INCLUDING, ANALOG-TO-DIGITAL CONVERTER MEANS AND, ANGLE CONTROL MEANS CONNECTED TO SAID CONVERTER MEANS SO AS TO CAUSE SAID CONVERTER MEANS TO DERIVE PERIODIC FIRST SAMPLES FROM SAID INPUT SIGNAL WHEN SAID COMPONENT SIGNAL IS AT A FIRST ANGLE AND TO DERIVE PERIODIC SECOND SAMPLES FROM SAID INPUT SIGNAL WHEN SAID COMPONENT SIGNAL IS AT A SECOND ANGLE; DIGITAL COHERENT INTEGRATING MEANS SERIALLY CONNECTED TO THE SAMPLING MEANS FOR COHERENTLY INTEGRATING SAID FIRST AND SECOND SAMPLES UTILIZING AN INTEGRATION STORAGE TIME T SO AS TO FORM INTEGRATED FIRST AND SECOND SAMPLES, RESPECTIVELY; RECTIFYING MEANS CONNECTED TO THE COHERENT INTEGRATING MEANS FOR RECTIFYING SAID INTEGRATED FIRST AND SECOND SAMPLES TO FORM RECTIFIED FIRST AND SECOND SAMPLES, RESPECTIVELY; AND SUMMING MEANS CONNECTED TO THE RECTIFYING MEANS FOR SUMMING SAID RECTIFIED FIRST AND SECOND SAMPLES, AN OUTPUT SIGNAL BEING FORMED BY THE SUMMING MEANS WHICH HAS A MAGNITUDE WHICH IS SUBSTANTIALLY INDEPENDENT OF THE ANGLE OF SAID COMPONENT SIGNAL; SAID OUTPUT SIGNAL THEREBY BEING INDICATIVE OF THE AMPLITUDE OF THAT COMPONENT SIGNAL IN THE INPUT SIGNAL HAVING A FREQUENCY 1/T.
References Cited (Backward Citations)
US3086172A
Cited
US3314015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |