Patent US3404354A successfully refreshed from Google Patents.
US3404354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplitude modulator employing forward biased unidirectional conducting device
Assignee: Dominion Electrohome Industries Ltd
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Filing: 1966-04-25
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Granted: 1968-10-01
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Expires: 1986-04-25
Abstract
No abstract record available.
Inventors
- 👤 Harry W Verlinden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:27
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/08; H03C1/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
292 words
A MODULATOR COMPRISING A FIRST SOURCE PRODUCING A RELATIVELY LOW FREQUENCY SIGNAL; A SECOND SOURCE PRODUCING A RELATIVELY HIGH FREQUENCY SIGNAL TO BE AMPLITUDE MODULATED BY SAID RELATIVELY LOW FREQUENCY SIGNAL; A UNIDIRECTIONAL CONDUCTING DEVICE HAVING ANODE AND CATHODE ELECTRODES; A SOURCE OF BIASING POTENTIAL; A TERMINAL AT A REFERENCE POTENTIAL, SAID RESISTORS, SAID TERSAID SOURCE OF BIASING POTENTIAL, SAID RESISTORS, SAID TERMINAL AND SAID UNIDIRECTIONAL CONDUCTING DEVICE BEING CONNECTED IN A CIRCUIT SUCH THAT SAID UNIDIRECTIONAL DEVICE IS BIASED INTO CONDUCTION IN THE FORWARD DIRECTION WITH ONE OF SAID RESISTORS BEING CONNECTED BETWEEN SAID SOURCE OF BIASING POTENTIAL AND ONE OF SAID ELECTRODES OF SAID UNIDIRECTIONAL CONDUCTING DEVICE, AND THE OTHER OF SAID RESISTORS BEING CONNECTED BETWEEN THE OTHER OF SAID ELECTRODES OF SAID UNIDIRECTIONAL CONDUCTING DEVICE AND SAID TERMINAL; AND MEANS CONNECTING SAID FIRST AND SECOND SOURCES TO THE SAME ONE OF SAID ELECTRODES OF SAID UNIDIRECTIONAL CONDUCTING DEVICE FOR APPLYING SAID RELATIVELY LOW FREQUENCY SIGNAL AND SAID RELATIVELY HIGH FREQUENCY SIGNAL TO SAID UNIDIRECTIONAL CONDUCTING DEVICE FOR PASSAGE OF SAID RELATIVELY LOW FREQUENCY SIGNAL AND A PART OF SAID RELATIVELY HIGH FREQUENCY SIGNAL THROUGH SAID UNIDIRECTTIONAL CONDUCTING DEVICE AND DEVELOPMENT OF AN AMPLITUDE MODULATED SIGNAL ACROSS ONE OF SAID RESISTORS; ONE HALF THE PEAK TO PEAK AMPLITUDE OF SAID RELATIVELY HIGH FREQUENCY SIGNAL APPLIED TO SAID UNIDIRECTIONAL CONDUCTING DEVICE BEING GREATER THAN THE ABSOLUTE VALUE OF SAID BIASING POTENTIAL APPLIED TO SAID UNIDIRECTIONAL CONDUCTING DEVICE AND ONE-HALF THE PEAK TO PEAK AMPLITUDE OF SAID RELATIVELY HIGH FREQUENCY SIGNAL APPLIED TO SAID UNIDIRECTIONAL CONDUCTING DEVICE LESS THE ABSOLUTE VALUE OF SAID BIASING POTENTIAL APPLIED TO SAID UNIDIRECTIONAL CONDUCTING DEVICE BEING GREATER THAN ONE-HALF THE PEAK TO PEAK AMPLITUDE OF SAID RELATIVELY LOW FREQUENCY SIGNAL APPLIED TO SAID UNIDRECTIONAL CONDUCTING DEVICE.
Claim 2
Dependent Claim
292 words
A MODULATOR COMPRISING A FIRST SOURCE PRODUCING A RELATIVELY LOW FREQUENCY SIGNAL; A SECOND SOURCE PRODUCING A RELATIVELY HIGH FREQUENCY SIGNAL TO BE AMPLITUDE MODULATED BY SAID RELATIVELY LOW FREQUENCY SIGNAL; A UNIDIRECTIONAL CONDUCTING DEVICE HAVING ANODE AND CATHODE ELECTRODES; A SOURCE OF BIASING POTENTIAL; A TERMINAL AT A REFERENCE POTENTIAL, SAID RESISTORS, SAID TERSAID SOURCE OF BIASING POTENTIAL, SAID RESISTORS, SAID TERMINAL AND SAID UNIDIRECTIONAL CONDUCTING DEVICE BEING CONNECTED IN A CIRCUIT SUCH THAT SAID UNIDIRECTIONAL DEVICE IS BIASED INTO CONDUCTION IN THE FORWARD DIRECTION WITH ONE OF SAID RESISTORS BEING CONNECTED BETWEEN SAID SOURCE OF BIASING POTENTIAL AND ONE OF SAID ELECTRODES OF SAID UNIDIRECTIONAL CONDUCTING DEVICE, AND THE OTHER OF SAID RESISTORS BEING CONNECTED BETWEEN THE OTHER OF SAID ELECTRODES OF SAID UNIDIRECTIONAL CONDUCTING DEVICE AND SAID TERMINAL; AND MEANS CONNECTING SAID FIRST AND SECOND SOURCES TO THE SAME ONE OF SAID ELECTRODES OF SAID UNIDIRECTIONAL CONDUCTING DEVICE FOR APPLYING SAID RELATIVELY LOW FREQUENCY SIGNAL AND SAID RELATIVELY HIGH FREQUENCY SIGNAL TO SAID UNIDIRECTIONAL CONDUCTING DEVICE FOR PASSAGE OF SAID RELATIVELY LOW FREQUENCY SIGNAL AND A PART OF SAID RELATIVELY HIGH FREQUENCY SIGNAL THROUGH SAID UNIDIRECTTIONAL CONDUCTING DEVICE AND DEVELOPMENT OF AN AMPLITUDE MODULATED SIGNAL ACROSS ONE OF SAID RESISTORS; ONE HALF THE PEAK TO PEAK AMPLITUDE OF SAID RELATIVELY HIGH FREQUENCY SIGNAL APPLIED TO SAID UNIDIRECTIONAL CONDUCTING DEVICE BEING GREATER THAN THE ABSOLUTE VALUE OF SAID BIASING POTENTIAL APPLIED TO SAID UNIDIRECTIONAL CONDUCTING DEVICE AND ONE-HALF THE PEAK TO PEAK AMPLITUDE OF SAID RELATIVELY HIGH FREQUENCY SIGNAL APPLIED TO SAID UNIDIRECTIONAL CONDUCTING DEVICE LESS THE ABSOLUTE VALUE OF SAID BIASING POTENTIAL APPLIED TO SAID UNIDIRECTIONAL CONDUCTING DEVICE BEING GREATER THAN ONE-HALF THE PEAK TO PEAK AMPLITUDE OF SAID RELATIVELY LOW FREQUENCY SIGNAL APPLIED TO SAID UNIDRECTIONAL CONDUCTING DEVICE.
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) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |