Patent US3237116A successfully refreshed from Google Patents.
US3237116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifiers and corrective circuits therefor
Assignee: Leeds and Northrup Co
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Filing: 1961-12-14
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Granted: 1966-02-22
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Expires: 1981-12-14
Abstract
No abstract record available.
Inventors
- 👤 Richard A Skinner
- 👤 Garden Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:38
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/30; H03F1/303
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
AN AMPLIFIER OF THE PERIODICALLY SAMPLING TYPE HAVING MEASURING PERIODS AND NON-MEASURING PERIODS COMPRISING INPUT AND OUTPUT TERMINALS REFERENCED TO A SOURCE OF REFERENCE POTENTIAL, A NEGATIVE FEEDBACK CIRCUIT CONNECTED BETWEEN THE INPUT AND OUTPUT TERMINALS OF SAID AMPLIFIER, A CAPACITOR CONNECTED TO SAID OUTPUT TERMINAL OF SAID AMPLIFIER IN SERIES-CIRCUIT RELATIONSHIP WITH A UTILIZATION DEVICE FOR STORING A PORTION OF THE VOLTAGE AT SAID OUTPUT TERMINAL DURING EACH NON-MEASURING PERIOD AND APPLYING IT AS A SERIES COMPENSATION IN SERIES OPPOSITION WITH THE OUTPUT VOLTAGE OF SAID AMPLIFIER DURING THE SUBSEQUENT MEASURING PERIOD, AN ENERGY STORING MEANS CONNECTED BETWEEN AN INTERMEDIATE POINT IN SAID FEEDBACK CIRCUIT AND REFERENCE POTENTIAL FOR APPLYING THE VOLTAGE OF SAID ENERGY STORING MEANS TO SAID AMPLIFIER AS A COMPENSATING SIGNAL CONTINUOUSLY, FIRST, SECOND AND THIRD SWITCHING MEANS, SAID FIRST SWITCHING MEANS BEING CONNECTED TO SAID INPUT TERMINAL FOR APPLYING A SIGNAL TO BE MEASURED TO SAID INPUT TERMINAL ONLY DURING MEASURING PERIODS, SAID SECOND SWITCHING MEANS BEING CONNECTED BETWEEN THE SIDE OF SAID CAPACITOR REMOTE FROM SAID OUTPUT TERMINAL AND SAID SOURCE OF REFERENCE POTENTIAL FOR APPLYING REFERENCE POTENTIAL TO THE LAST-NAMED SIDE OF SAID CAPACITOR DURING SAID NON-MEASURING PERIODS,
Claim 2
Dependent Claim
195 words
AN AMPLIFIER OF THE PERIODICALLY SAMPLING TYPE HAVING MEASURING PERIODS AND NON-MEASURING PERIODS COMPRISING INPUT AND OUTPUT TERMINALS REFERENCED TO A SOURCE OF REFERENCE POTENTIAL, A NEGATIVE FEEDBACK CIRCUIT CONNECTED BETWEEN THE INPUT AND OUTPUT TERMINALS OF SAID AMPLIFIER, A CAPACITOR CONNECTED TO SAID OUTPUT TERMINAL OF SAID AMPLIFIER IN SERIES-CIRCUIT RELATIONSHIP WITH A UTILIZATION DEVICE FOR STORING A PORTION OF THE VOLTAGE AT SAID OUTPUT TERMINAL DURING EACH NON-MEASURING PERIOD AND APPLYING IT AS A SERIES COMPENSATION IN SERIES OPPOSITION WITH THE OUTPUT VOLTAGE OF SAID AMPLIFIER DURING THE SUBSEQUENT MEASURING PERIOD, AN ENERGY STORING MEANS CONNECTED BETWEEN AN INTERMEDIATE POINT IN SAID FEEDBACK CIRCUIT AND REFERENCE POTENTIAL FOR APPLYING THE VOLTAGE OF SAID ENERGY STORING MEANS TO SAID AMPLIFIER AS A COMPENSATING SIGNAL CONTINUOUSLY, FIRST, SECOND AND THIRD SWITCHING MEANS, SAID FIRST SWITCHING MEANS BEING CONNECTED TO SAID INPUT TERMINAL FOR APPLYING A SIGNAL TO BE MEASURED TO SAID INPUT TERMINAL ONLY DURING MEASURING PERIODS, SAID SECOND SWITCHING MEANS BEING CONNECTED BETWEEN THE SIDE OF SAID CAPACITOR REMOTE FROM SAID OUTPUT TERMINAL AND SAID SOURCE OF REFERENCE POTENTIAL FOR APPLYING REFERENCE POTENTIAL TO THE LAST-NAMED SIDE OF SAID CAPACITOR DURING SAID NON-MEASURING PERIODS,
References Cited (Backward Citations)
US2954529A
Cited
US2970266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |