US3200345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective variable gain and bandwidth amplifier
Assignee: Ampex Corp
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Filing: 1962-09-17
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Granted: 1965-08-10
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Expires: 1982-09-17
Abstract
No abstract record available.
Inventors
- 👤 Ralph R Luckenbach
- 👤 Vernon R Natwick
- 👤 Swyryd Miroslav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:30
CPC Classifications
H; H03; H03G; H03G9/00; H03G9/20; H03G9/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
A SELECTABLE GAIN AND BANDWIDTH AMPLIFIER CIRCUIT COMPRISING A PAIR OF DIFFERENTIAL CONNECTED AMPLIFYING TRANSISTORS, EACH OF SAID TRANSISTORS HAVING AN EMITTER ELECTRODE, A BASE ELECTRODE, AND A COLLECTOR ELECTRODE, A PLURALITY OF GAIN AND BANDWIDTH DETERMINING NETWORKS EACH INCLUDING A PAIR OF SERIES CONNECTED RESISTORS HAVING A COMMON JUNCTION THEREBETWEEN, PAIRS OF DIODES RESPECTIVELY COUPLING SAID NETWORKS IN CASCADE BETWEEN THE COLLECTOR ELECTRODES OF SAID TRANSISTORS, SAID DIODES HAVING LIKE POLARITY TERMINALS CONNECTED TO SAID COLLECTOR
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) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |