US3214705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unity gain preamplifier for photomultiplier tubes
Assignee: Lockheed Martin Corp
•
Filing: 1962-07-18
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Granted: 1965-10-26
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Expires: 1982-07-18
Abstract
No abstract record available.
Inventors
- 👤 Raymond V Smith
- 👤 Joseph B Reagan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:32
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
AN AMPLIFIER COMPRISING: (A) AN INPUT TERMINAL, (B) AN INPUT NETWORK HAVING STRAY CAPACITANCE, (C) AN OUTPUT TERMINAL (D) FIRST AND SECOND TRANSISTORS, EACH HAVING A BASE, AN EMITTER AND A COLLECTOR, THE COLLECTOR OF SAID FIRST TRANSISTOR CONNECTED TO THE BASE OF SAID SECOND TRANSISTOR, (E) THE COLLECTOR OF SAID SECOND TRANSISTOR BEING CONNECTED TO THE EMITTER OF SAID FIRST TRANSISTOR IN A REGENERATIVE FEEDBACK ARRANGEMENT, (F) MEANS COUPLING SAID SECOND TRANSISTOR TO SAID OUTPUT TERMINAL, (G) MEANS CONNECTING SAID INPUT TERMINAL TO THE BASE OF SAID FIRST TRANSISTOR, (H) SAID CONNECTING MEANS INCLUDING MEANS FOR APPLYING A SIGNAL TO SAID BASE OF SAID FIRST TRANSISTOR IN PHASE WITH THE REGENERATIVE FEEDBACK SIGNAL APPLIED TO THE EMITTER OF SAID FIRST TRANSISTOR, (I) SAID APPLYING MEANS INCLUDING SAID INPUT NETWORK HAVING A RESISTANCE AND SAID STRAY CAPACITANCE FOR DELAYING THE RISE TIME OF THE SIGNAL APPLIED TO SAID BASE OF THE FIRST TRANSISTOR.
Claim 2
Dependent Claim
153 words
AN AMPLIFIER COMPRISING: (A) AN INPUT TERMINAL, (B) AN INPUT NETWORK HAVING STRAY CAPACITANCE, (C) AN OUTPUT TERMINAL (D) FIRST AND SECOND TRANSISTORS, EACH HAVING A BASE, AN EMITTER AND A COLLECTOR, THE COLLECTOR OF SAID FIRST TRANSISTOR CONNECTED TO THE BASE OF SAID SECOND TRANSISTOR, (E) THE COLLECTOR OF SAID SECOND TRANSISTOR BEING CONNECTED TO THE EMITTER OF SAID FIRST TRANSISTOR IN A REGENERATIVE FEEDBACK ARRANGEMENT, (F) MEANS COUPLING SAID SECOND TRANSISTOR TO SAID OUTPUT TERMINAL, (G) MEANS CONNECTING SAID INPUT TERMINAL TO THE BASE OF SAID FIRST TRANSISTOR, (H) SAID CONNECTING MEANS INCLUDING MEANS FOR APPLYING A SIGNAL TO SAID BASE OF SAID FIRST TRANSISTOR IN PHASE WITH THE REGENERATIVE FEEDBACK SIGNAL APPLIED TO THE EMITTER OF SAID FIRST TRANSISTOR, (I) SAID APPLYING MEANS INCLUDING SAID INPUT NETWORK HAVING A RESISTANCE AND SAID STRAY CAPACITANCE FOR DELAYING THE RISE TIME OF THE SIGNAL APPLIED TO SAID BASE OF THE FIRST TRANSISTOR.
References Cited (Backward Citations)
US2892165A
Cited
US3015033A
Cited
US3025404A
Cited
US3093740A
Cited
US3073969A
Cited
US3069552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |