US3201718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency modulation circuit
Assignee: Ampex Corp
•
Filing: 1962-07-02
•
Granted: 1965-08-17
•
Expires: 1982-07-02
Abstract
No abstract record available.
Inventors
- 👤 Emil A Trojak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:32
CPC Classifications
H; H03; H03C; H03C3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A FREQUENCY MODULATING CIRCUIT COMPRISING: A TRANSISTOR MULTIVIBRATOR CIRCUIT INCLUDING A PAIR OF TRANSISTORS WITH CROSS-COUPLED CAPACITORS, SAID TRANSISTORS EACH HAVING AN EMITTER, A BASE AND A COLLECTOR, EACH OF SAID CROSS-COUPLED CAPACITORS CONNECTED BETWEEN THE COLLECTOR OF ONE TRANSISTORAND THE BASE OF THE OTHER TRANSISTOR; A PAIR OF FORWARD-BIASED SEMICONDUCTOR DIODES CONNECTED BETWEEN THE BASES OF SAID TRANSISTORS, SAID DIODES CONNECTED IN SERIES OPPOSITION AND HAVING A JUNCTION POINT THEREBETWEEN; A MODULATING SIGNAL SOURCE CONNECTED TO THE JUNCTION POINT BETWEEN SAID DIODES, SAID SEMICONDUCTOR DIODES COUPLING DIRECTLY SAID MODULATING SIGNAL SOURCE TO THE BASES OF SAID TRANSISTORS; AN OUTPUT TRANSFORMER HAVING A PRIMARY AND A SECONDARY, THE PRIMARY OF SAID TRANSFORMER CONNECTED ACROSS THE EMITTERS OF SAID TRANSISTORS; AND A TRANSISTOR IMPEDANCE CONVERTER CONNECTED ACROSS THE SECONDARY OF SAID TRANSFORMERS.
Claim 2
Dependent Claim
131 words
A FREQUENCY MODULATING CIRCUIT COMPRISING: A TRANSISTOR MULTIVIBRATOR CIRCUIT INCLUDING A PAIR OF TRANSISTORS WITH CROSS-COUPLED CAPACITORS, SAID TRANSISTORS EACH HAVING AN EMITTER, A BASE AND A COLLECTOR, EACH OF SAID CROSS-COUPLED CAPACITORS CONNECTED BETWEEN THE COLLECTOR OF ONE TRANSISTORAND THE BASE OF THE OTHER TRANSISTOR; A PAIR OF FORWARD-BIASED SEMICONDUCTOR DIODES CONNECTED BETWEEN THE BASES OF SAID TRANSISTORS, SAID DIODES CONNECTED IN SERIES OPPOSITION AND HAVING A JUNCTION POINT THEREBETWEEN; A MODULATING SIGNAL SOURCE CONNECTED TO THE JUNCTION POINT BETWEEN SAID DIODES, SAID SEMICONDUCTOR DIODES COUPLING DIRECTLY SAID MODULATING SIGNAL SOURCE TO THE BASES OF SAID TRANSISTORS; AN OUTPUT TRANSFORMER HAVING A PRIMARY AND A SECONDARY, THE PRIMARY OF SAID TRANSFORMER CONNECTED ACROSS THE EMITTERS OF SAID TRANSISTORS; AND A TRANSISTOR IMPEDANCE CONVERTER CONNECTED ACROSS THE SECONDARY OF SAID TRANSFORMERS.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |