Patent US5058590A successfully refreshed from Google Patents.
US3129391A
Expired / Lapsed
US
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Wide deviation frequency modulation signal generator
Assignee: Ampex Corp
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Filing: 1960-01-28
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Granted: 1964-04-14
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Expires: 1980-01-28
Abstract
No abstract record available.
Inventors
- 👤 Louis J Kabell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:02
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/02; H03C3/06; H03C3/10; H03C3/24; H03C3/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A FREQUENCY MODULATED SIGNAL GENERATOR COMPRISING AN OSCILLATION GENERATOR CIRCUIT HAVING A NOMINAL OPERAT ING FREQUENCY AND INCLUDING A PAIR OF CROSS-COUPLED AMPLIFIER DEVICES, SAID AMPLIFER DEVICES EACH HAVING AN OUTPUT ELEMENT AND A CONTROL ELEMENT, MEANS FOR APPLYING A MODULATING SIGNAL TO EACH OF SAID AMPLIFER DEVICES SIMULTANEOUSLY INCLUDING FORWARD BIASED SEMI-CONDUCTOR DIODES COUPLED TO THE CONTROL ELEMENTS OF THE AMPLIFER DEVICES, AND BIAS MEANS CONNECTED TO SAID MEANS FOR APPLYING A MODULATING SIGNAL TO PROVIDE A SELECTED FORWARD BIAS IN THE ABSENCE OF THE MODULATING SIGNAL; SAID FORWARD BIAS BEING SO SELECTED THAT THE CHANGE THEREOF EFFECTED BY SAID MODULATING SIGNAL ALTERS THE RESISTANCE OF SAID DIODES AND THUS THE OPERATING FREQUENCY OF SAID SIGNAL GENERATOR.
Claim 2
Dependent Claim
118 words
A FREQUENCY MODULATED SIGNAL GENERATOR COMPRISING AN OSCILLATION GENERATOR CIRCUIT HAVING A NOMINAL OPERAT ING FREQUENCY AND INCLUDING A PAIR OF CROSS-COUPLED AMPLIFIER DEVICES, SAID AMPLIFER DEVICES EACH HAVING AN OUTPUT ELEMENT AND A CONTROL ELEMENT, MEANS FOR APPLYING A MODULATING SIGNAL TO EACH OF SAID AMPLIFER DEVICES SIMULTANEOUSLY INCLUDING FORWARD BIASED SEMI-CONDUCTOR DIODES COUPLED TO THE CONTROL ELEMENTS OF THE AMPLIFER DEVICES, AND BIAS MEANS CONNECTED TO SAID MEANS FOR APPLYING A MODULATING SIGNAL TO PROVIDE A SELECTED FORWARD BIAS IN THE ABSENCE OF THE MODULATING SIGNAL; SAID FORWARD BIAS BEING SO SELECTED THAT THE CHANGE THEREOF EFFECTED BY SAID MODULATING SIGNAL ALTERS THE RESISTANCE OF SAID DIODES AND THUS THE OPERATING FREQUENCY OF SAID SIGNAL GENERATOR.
References Cited (Backward Citations)
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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) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |