US3075150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor demodulator
Assignee: RTX Corp
•
Filing: 1957-10-30
•
Granted: 1963-01-22
•
Expires: 1977-10-30
Abstract
No abstract record available.
Inventors
- 👤 Berman Herbert
- 👤 Sporn Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:54
CPC Classifications
H; H03; H03D; H03D1/00; H03D1/22; H03D1/229
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A KEYED TRANSISTOR DEMODULATOR INCLUDING IN COMBINATION A SOURCE OF CARRIER INPUT SIGNAL HAVING A PEAK AMPLITUDE, A TRANSISTOR HAVING A BASE AND AN EMITTER AND A COLLECTOR, THE BASE AND EMITTER COMPOSING A FIRST P-N JUNCTION, A SECOND P-N JUNCTION, ONE OF THE P-N JUNCTIONS HAVING THE CHARACTERISTIC OF PRESENTING A HIGH IMPEDANCE TO VOLTAGES OF A CERTAIN POLARITY AND OF A MAGNITUDE GREATER THAN ZERO AND LESS THAN A PREDETERMINED MAGNITUDE AND A LOW IMPEDANCE TO VOLTAGES OF SAID CERTAIN POLARITY AND OF A MAGNITUDE GREATER THAN SUCH MAGNITUDE, A REFERENCE CIRCUIT INCLUDING THE TWO JUNCTIONS, A SOURCE OF REFERENCE VOLTAGE SYNCHRONOUS WITH THE CARRIER SIGNAL AND OF A PEAK AMPLITUDE SLIGHTLY GREATER THAN SUCH PREDETERMINED MAGNITUDE, MEANS CONNECTING THE SOURCE OF REFERENCE VOLTAGE TO THE REFERENCE CIRCUIT TO RENDER THE JUNCTION HAVING SAID CHARACTERISTIC CONDUCTIVE ONLY IN THE REGION OF THE PEAK AMPLITUDE OF SAID CARRIER SIGNAL, AND MEANS INCLUDING A CAPACITOR CONNECTING THE SOURCE OF CARRIER INPUT SIGNAL TO THE COLLECTOR.
Claim 2
Dependent Claim
165 words
A KEYED TRANSISTOR DEMODULATOR INCLUDING IN COMBINATION A SOURCE OF CARRIER INPUT SIGNAL HAVING A PEAK AMPLITUDE, A TRANSISTOR HAVING A BASE AND AN EMITTER AND A COLLECTOR, THE BASE AND EMITTER COMPOSING A FIRST P-N JUNCTION, A SECOND P-N JUNCTION, ONE OF THE P-N JUNCTIONS HAVING THE CHARACTERISTIC OF PRESENTING A HIGH IMPEDANCE TO VOLTAGES OF A CERTAIN POLARITY AND OF A MAGNITUDE GREATER THAN ZERO AND LESS THAN A PREDETERMINED MAGNITUDE AND A LOW IMPEDANCE TO VOLTAGES OF SAID CERTAIN POLARITY AND OF A MAGNITUDE GREATER THAN SUCH MAGNITUDE, A REFERENCE CIRCUIT INCLUDING THE TWO JUNCTIONS, A SOURCE OF REFERENCE VOLTAGE SYNCHRONOUS WITH THE CARRIER SIGNAL AND OF A PEAK AMPLITUDE SLIGHTLY GREATER THAN SUCH PREDETERMINED MAGNITUDE, MEANS CONNECTING THE SOURCE OF REFERENCE VOLTAGE TO THE REFERENCE CIRCUIT TO RENDER THE JUNCTION HAVING SAID CHARACTERISTIC CONDUCTIVE ONLY IN THE REGION OF THE PEAK AMPLITUDE OF SAID CARRIER SIGNAL, AND MEANS INCLUDING A CAPACITOR CONNECTING THE SOURCE OF CARRIER INPUT SIGNAL TO THE COLLECTOR.
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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) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |