US3239772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly efficient semiconductor switching amplifier
Assignee: Westinghouse Electric Corp
•
Filing: 1963-02-06
•
Granted: 1966-03-08
•
Expires: 1983-02-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Tom L Dennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:17
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/02; H01J41/06; H03; H03F; H03F3/00; H03F3/20; H03F3/21; H03F3/217
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN A SEMICONDUCTOR AMPLIFIER HAVING AN EFFICIENCY GREATER THAN 90% AND OPERATIVE WITH A VOLTAGE SOURCE AND A POINT OF REFERENCE POTENTIAL, THE COMBINATION COMPRISING; AT LEAST TWO TRANSISTORS OF LIKE CONDUCTIVITY HAVING A COMMON CONNECTION AND BEING CONNECTED BETWEEN SAID SUPPLY VOLTAGE AND SAID POINT OF REFERENCE POTENTIAL; AN INPUT SIGNAL SOURCE PROVIDING A DRIVING SIGNAL TO SAID TRANSISTORS FOR OPERATING SAID TRANSISTORS AS A PAIR OF SEMICONDUCTOR SWITCHES HAVING MUTUALLY OPPOSITE OPERATING STATES, SAID INPUT SIGNAL HAVING A PREDETERMINED FREQUENCY AND WAVESHAPE TO OPERATE SAID TRANSISTORS ALTERNATELY BETWEEN CONDUCTING AND NON-CONDUCTING STATES, SAID CONDUCTING STATE BEING IN THE SATURATING REGION OF THE CURRENT VOLTAGE CHARACTERISTIC OF SAID TRANSISTORS, SAID INPUT CURRENT SIGNAL PROVIDING ONLY ENOUGH CURRENT TO MAINTAIN SATURATION, WHEN CONDUCTIVE; A TUNED NETWORK PROVIDING A LOW IMPEDANCE TO A PRESELECTED RESONANT FREQUENCY AND A HIGH IMPEDANCE TO HARMONIC FREQUENCIES,
Claim 2
Dependent Claim
142 words
IN A SEMICONDUCTOR AMPLIFIER HAVING AN EFFICIENCY GREATER THAN 90% AND OPERATIVE WITH A VOLTAGE SOURCE AND A POINT OF REFERENCE POTENTIAL, THE COMBINATION COMPRISING; AT LEAST TWO TRANSISTORS OF LIKE CONDUCTIVITY HAVING A COMMON CONNECTION AND BEING CONNECTED BETWEEN SAID SUPPLY VOLTAGE AND SAID POINT OF REFERENCE POTENTIAL; AN INPUT SIGNAL SOURCE PROVIDING A DRIVING SIGNAL TO SAID TRANSISTORS FOR OPERATING SAID TRANSISTORS AS A PAIR OF SEMICONDUCTOR SWITCHES HAVING MUTUALLY OPPOSITE OPERATING STATES, SAID INPUT SIGNAL HAVING A PREDETERMINED FREQUENCY AND WAVESHAPE TO OPERATE SAID TRANSISTORS ALTERNATELY BETWEEN CONDUCTING AND NON-CONDUCTING STATES, SAID CONDUCTING STATE BEING IN THE SATURATING REGION OF THE CURRENT VOLTAGE CHARACTERISTIC OF SAID TRANSISTORS, SAID INPUT CURRENT SIGNAL PROVIDING ONLY ENOUGH CURRENT TO MAINTAIN SATURATION, WHEN CONDUCTIVE; A TUNED NETWORK PROVIDING A LOW IMPEDANCE TO A PRESELECTED RESONANT FREQUENCY AND A HIGH IMPEDANCE TO HARMONIC FREQUENCIES,
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |