Patent US3730196A successfully refreshed from Google Patents.
Patent US3221262A successfully refreshed from Google Patents.
US3221262A
Expired / Lapsed
US
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Direct-coupled negative feedback amplifier
Assignee: Automatic Timing and Controls Inc
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Filing: 1962-03-23
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Granted: 1965-11-30
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Expires: 1982-03-23
Abstract
No abstract record available.
Inventors
- 👤 Grover K Houpt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:54
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/34; H03F1/347
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
AN AMPLIFIER CIRCUIT COMPRISING: (A) AN OLD PLURALITY OF SOLID-STATE AMPLIFYING DEVICES OF ALTERNATING CONDUCTIVITY TYPES DIRECTLY COUPLED IN SERIES, EACH OF SAID DEVICES HAVING EMITTER, COLLECTOR AND BASE ELECTRODES, (B) MEANS COUPLED BETWEEN THE EMITTERS OF THE FINAL ONE OF SAID DEVICES AND THE FIRST OF SAID PLURALITY OF SAID DEVICES FOR PROVIDING A NEGATIVE A.C. FEEDBACK PATH A PORTION OF SAID LAST-NAMED MEANS ALSO PROVIDING D.C. FEEDBACK BETWEEN SAID EMITTERS,
Claim 2
Dependent Claim
72 words
AN AMPLIFIER CIRCUIT COMPRISING: (A) AN OLD PLURALITY OF SOLID-STATE AMPLIFYING DEVICES OF ALTERNATING CONDUCTIVITY TYPES DIRECTLY COUPLED IN SERIES, EACH OF SAID DEVICES HAVING EMITTER, COLLECTOR AND BASE ELECTRODES, (B) MEANS COUPLED BETWEEN THE EMITTERS OF THE FINAL ONE OF SAID DEVICES AND THE FIRST OF SAID PLURALITY OF SAID DEVICES FOR PROVIDING A NEGATIVE A.C. FEEDBACK PATH A PORTION OF SAID LAST-NAMED MEANS ALSO PROVIDING D.C. FEEDBACK BETWEEN SAID EMITTERS,
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |