Patent US2576780A successfully refreshed from Google Patents.
Patent US3218467A successfully refreshed from Google Patents.
US3218467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor amplifier
Assignee: Westinghouse Electric Corp
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Filing: 1961-11-21
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Granted: 1965-11-16
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Expires: 1981-11-21
Abstract
No abstract record available.
Inventors
- 👤 John M Bentley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:45
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/04; H03F3/10; H03F3/12; H03K; H03K3/00; H03K3/02; H03K3/313; H03K3/315
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
A PULSE AMPLIFIER COMPRISING, IN COMBINATION: A FIRST SEMICONDUCTOR DIODE EXHIBITING A NEGATIVE CONDUCTANCE REGION OVER A PORTION OF ITS CURRENT-VOLTAGE CHARACTERISTIC CURVE; SEMICONDUCTOR DIODE MEANS OPERABLY CONNECTED TO SAID FIRST DIODE FOR SWITCHING SAID FIRST DIODE THROUGH SAID NEGATIVE CONDUCTANCE REGION; MEANS FOR BIASING SAID FIRST DIODE TO A FIRST STABLE OPERATING POINT; A LOAD IMPEDANCE CONNECTED TO SAID FIRST DIODE AND SAID MEANS FOR BIASING DEFINING A LOAD LINE HAVING A SLOPE LESS THAN THE SLOPE OF SAID NEGATIVE CONDUCTANCE REGION THEREBY ESTABLISHING TWO STABLE OPERATING POINTS ON SAID CHARACTERISTIC CURVE; TRANSFORMER MEANS INCLUDING A PRIMARY AND A SECOND WINDING, SAID PRIMARY WINDING CONNECTED IN SERIES WITH SAID FIRST DIODE AND SAID LOAD IMPEDANCE AND RESPONSIVE TO THE RATE OF CHANGE OF CURRENT THEREIN FOR INDUCTING A BIPOLAR OUTPUT VOLTAGE IN SAID SECONDARY WINDING; MEANS CONNECTED BETWEEN SAID SECONDARY WINDING AND SAID FIRST DIODE FOR PROVIDING A FEEDBACK VOLTAGE COMPRISING A PREDETERMINED PORTION OF SAID OUTPUT VOLTAGE TO AUTOMATICALLY REDUCE THE VOLTAGE ACROSS SAID FIRST DIODE BELOW THE VALLEY VOLTAGE CAUSING SAID FIRST DIODE TO ASSUME SAID FIRST OPERATING POINT AFTER THE THRESHOLD VALUE THEREOF HAS BEEN EXCEEDED.
Claim 2
Dependent Claim
190 words
A PULSE AMPLIFIER COMPRISING, IN COMBINATION: A FIRST SEMICONDUCTOR DIODE EXHIBITING A NEGATIVE CONDUCTANCE REGION OVER A PORTION OF ITS CURRENT-VOLTAGE CHARACTERISTIC CURVE; SEMICONDUCTOR DIODE MEANS OPERABLY CONNECTED TO SAID FIRST DIODE FOR SWITCHING SAID FIRST DIODE THROUGH SAID NEGATIVE CONDUCTANCE REGION; MEANS FOR BIASING SAID FIRST DIODE TO A FIRST STABLE OPERATING POINT; A LOAD IMPEDANCE CONNECTED TO SAID FIRST DIODE AND SAID MEANS FOR BIASING DEFINING A LOAD LINE HAVING A SLOPE LESS THAN THE SLOPE OF SAID NEGATIVE CONDUCTANCE REGION THEREBY ESTABLISHING TWO STABLE OPERATING POINTS ON SAID CHARACTERISTIC CURVE; TRANSFORMER MEANS INCLUDING A PRIMARY AND A SECOND WINDING, SAID PRIMARY WINDING CONNECTED IN SERIES WITH SAID FIRST DIODE AND SAID LOAD IMPEDANCE AND RESPONSIVE TO THE RATE OF CHANGE OF CURRENT THEREIN FOR INDUCTING A BIPOLAR OUTPUT VOLTAGE IN SAID SECONDARY WINDING; MEANS CONNECTED BETWEEN SAID SECONDARY WINDING AND SAID FIRST DIODE FOR PROVIDING A FEEDBACK VOLTAGE COMPRISING A PREDETERMINED PORTION OF SAID OUTPUT VOLTAGE TO AUTOMATICALLY REDUCE THE VOLTAGE ACROSS SAID FIRST DIODE BELOW THE VALLEY VOLTAGE CAUSING SAID FIRST DIODE TO ASSUME SAID FIRST OPERATING POINT AFTER THE THRESHOLD VALUE THEREOF HAS BEEN EXCEEDED.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |