US3112451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor linear phase shifter
Assignee: Avco Corp
•
Filing: 1959-12-01
•
Granted: 1963-11-26
•
Expires: 1979-12-01
Abstract
No abstract record available.
Inventors
- 👤 James T Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:40
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/16; H03H11/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
AN ELECTRONIC LINEAR PHASE SHIFTER COMPRISING A PLURALITY OF SUBSTANTIALLY IDENTICAL CASCADED TRANSISTOR STAGES, EACH OF SAID STAGES INCLUDING A TRANSISTOR HAVING A BASE, AN EMITTER, AND A COLLECTOR ELECTRODE AND HAVING AN INPUT CIRCUIT BETWEEN SAID BASE AND SAID EMITTER ELECTRODE, AND AN OUTPUT CIRCUIT BETWEEN SAID EMITTER AND SAID COLLECTOR ELECTRODE, AND INDUCTIVE IMPEDANCE CONNECTED TO SAID EMITTER IN A CIRCUIT COMMON TO SAID INPUT CIRCUIT AND SAID OUTPUT CIRCUIT, A CAPACITIVE IMPEDANCE CONNECTED ACROSS SAID OUTPUT CIRCUIT, AND DIRECT CURRENT FEEDBACK MEANS CONNECTED FROM SAID OUTPUT CIRCUIT TO SAID INPUT CIRCUIT; AN ALTERNATING CURRENT SOURCE VARIABLE IN FREQUENCY BETWEEN PREDETERMINED LIMITS CONNECTED ACROSS THE INPUT CIRCUIT OF THE FIRST OF SAID STAGES, AND DIRECT CURRENT COUPLING MEANS FOR CONNECTING THE OUTPUT CIRCUIT OF EACH OF SAID TRANSISTOR STAGES TO THE INPUT CIRCUIT OF A SUCCEEDING TRANSISTOR STAGE.
Claim 2
Dependent Claim
140 words
AN ELECTRONIC LINEAR PHASE SHIFTER COMPRISING A PLURALITY OF SUBSTANTIALLY IDENTICAL CASCADED TRANSISTOR STAGES, EACH OF SAID STAGES INCLUDING A TRANSISTOR HAVING A BASE, AN EMITTER, AND A COLLECTOR ELECTRODE AND HAVING AN INPUT CIRCUIT BETWEEN SAID BASE AND SAID EMITTER ELECTRODE, AND AN OUTPUT CIRCUIT BETWEEN SAID EMITTER AND SAID COLLECTOR ELECTRODE, AND INDUCTIVE IMPEDANCE CONNECTED TO SAID EMITTER IN A CIRCUIT COMMON TO SAID INPUT CIRCUIT AND SAID OUTPUT CIRCUIT, A CAPACITIVE IMPEDANCE CONNECTED ACROSS SAID OUTPUT CIRCUIT, AND DIRECT CURRENT FEEDBACK MEANS CONNECTED FROM SAID OUTPUT CIRCUIT TO SAID INPUT CIRCUIT; AN ALTERNATING CURRENT SOURCE VARIABLE IN FREQUENCY BETWEEN PREDETERMINED LIMITS CONNECTED ACROSS THE INPUT CIRCUIT OF THE FIRST OF SAID STAGES, AND DIRECT CURRENT COUPLING MEANS FOR CONNECTING THE OUTPUT CIRCUIT OF EACH OF SAID TRANSISTOR STAGES TO THE INPUT CIRCUIT OF A SUCCEEDING TRANSISTOR STAGE.
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) | 1966-11-25 | 1967-05-27 | 1967-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-25 | 1971-05-27 | 1971-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-25 | 1975-05-27 | 1975-11-26 | $7700.00 | Window Closed / Lapsed |