US3176236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drift stabilized amplifier
Assignee: GTE Sylvania Inc
•
Filing: 1961-06-23
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Granted: 1965-03-30
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Expires: 1981-06-23
Abstract
No abstract record available.
Inventors
- 👤 Matthew C Abbott
- 👤 Thomas H Griffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:49
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/30; H03F1/303
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A DRIFT STABILIZED AMPLIFIER CIRCUIT COMPRISING, MEANS FOR GENERATING AN ALTERNATING CURRENT INPUT SIGNAL, AN AMPLIFIER HAVING AN INPUT CIRCUIT AND AN OUTPUT CIRCUIT, MEANS COUPLING SAID INPUT SIGNAL TO SAID INPUT CIRCUIT TO PRODUCE AN AMPLIFIED OUTPUT SIGNAL HAVING A DIRECT CURRENT COMPONENT AND AN ALTERNATING CURRENT COMPONENT, A FILTER CONNECTED TO SAID OUTPUT CIRCUIT AND OPERATIVE TO PASS ONLY THE DIRECT CURRENT COMPONENT OF SAID OUTPUT SIGNAL, A SOURCE OF REFERENCE VOLTAGE, A COMPARATOR OPERATIVE IN RESPONSE TO SAID DIRECT CURRENT COMPONENT AND SAID REFERENCE VOLTAGE TO GENERATE AN INVERTED SIGNAL EQUAL TO THE DIFFERENCE BETWEEN SAID DIRECT CURRENT COMPONENT AN, SAID REFERENCE VOLTAGE, AND FEEDBACK CIRCUIT MEANS FOR APPLYING SAID INVERTED SIGNAL TO THE INPUT CIRCUIT OF SAID AMPLIFIER TO CANCEL VARIATIONS IN THE QUIESCENT OPERATING LEVEL OF SAID AMPLIFIER.
Claim 2
Dependent Claim
133 words
A DRIFT STABILIZED AMPLIFIER CIRCUIT COMPRISING, MEANS FOR GENERATING AN ALTERNATING CURRENT INPUT SIGNAL, AN AMPLIFIER HAVING AN INPUT CIRCUIT AND AN OUTPUT CIRCUIT, MEANS COUPLING SAID INPUT SIGNAL TO SAID INPUT CIRCUIT TO PRODUCE AN AMPLIFIED OUTPUT SIGNAL HAVING A DIRECT CURRENT COMPONENT AND AN ALTERNATING CURRENT COMPONENT, A FILTER CONNECTED TO SAID OUTPUT CIRCUIT AND OPERATIVE TO PASS ONLY THE DIRECT CURRENT COMPONENT OF SAID OUTPUT SIGNAL, A SOURCE OF REFERENCE VOLTAGE, A COMPARATOR OPERATIVE IN RESPONSE TO SAID DIRECT CURRENT COMPONENT AND SAID REFERENCE VOLTAGE TO GENERATE AN INVERTED SIGNAL EQUAL TO THE DIFFERENCE BETWEEN SAID DIRECT CURRENT COMPONENT AN, SAID REFERENCE VOLTAGE, AND FEEDBACK CIRCUIT MEANS FOR APPLYING SAID INVERTED SIGNAL TO THE INPUT CIRCUIT OF SAID AMPLIFIER TO CANCEL VARIATIONS IN THE QUIESCENT OPERATING LEVEL OF SAID AMPLIFIER.
References Cited (Backward Citations)
US2619552A
Cited
US2741668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |