US3154741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase-error cancellation heterodyne receiver
Assignee: Motorola Solutions Inc
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Filing: 1961-06-26
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Granted: 1964-10-27
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Expires: 1981-06-26
Abstract
No abstract record available.
Inventors
- 👤 Stanley W Attwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:15
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
A HETERODYNE RECEIVER INCLUDING IN COMBINATION, A HETERODYNE MIXER, AN INTERMEDIATE FREQUENCY AMPLIFIER COUPLED TO SAID HETERODYNE MIXER FOR AMPLIFYING THE RESULTING INTERMEDIATE FREQUENCY SIGNAL, AND PHASE DETECTION MEANS COUPLED TO SAID INTERMEDIATE FREQUENCY AMPLIFIER, A LOCAL OSCILLATOR FOR GENERATING LOCAL OSCILLATIONS, A REFERENCE OSCILLATOR COUPLED TO SAID PHASE DETECTION MEANS, SAID PHASE DETECTION MEANS BEING RESPONSIVE TO THE COMBINED INPUTS FROM SAID INTERMEDIATE FREQUENCY AMPLIFIER AND SAID REFERENCE OSCILLATOR, PHASE SHIFTER MEANS COUPLED TO SAID LOCAL OSCILLATOR AND TO SAID PHASE DETECTION MEANS AND RESPONSIVE TO SAID PHASE DETECTION MEANS TO PRODUCE A PHASE SHIFT OF THE OSCILLATIONS FROM SAID LOCAL OSCILLATOR, MIXER CIRCUIT MEANS COUPLED TO SAID PHASE SHIFTER AND TO SAID REFERENCE OSCILLATOR AND RESPONSIVE TO SAID REFERENCE SIGNAL AND TO SAID OSCILLATIONS FOR PRODUCING A HETERODYNING SIGNAL HAVING AN UPPER SIDE BAND AND A LOWER SIDE BAND, AND CONTROL MEANS COUPLED TO SAID MIXER CIRCUIT MEANS FOR ALTERNATELY INTRODUCING SAID UPPER SIDE BAND AND SAID LOWER SIDE BAND OF SAID HETERODYNING SIGNAL TO THE HETERODYNE MIXER ON A TIME SHARED BASIS, SAID PHASE DETECTION MEANS, SAID PHASE SHIFTER
Claim 2
Dependent Claim
182 words
A HETERODYNE RECEIVER INCLUDING IN COMBINATION, A HETERODYNE MIXER, AN INTERMEDIATE FREQUENCY AMPLIFIER COUPLED TO SAID HETERODYNE MIXER FOR AMPLIFYING THE RESULTING INTERMEDIATE FREQUENCY SIGNAL, AND PHASE DETECTION MEANS COUPLED TO SAID INTERMEDIATE FREQUENCY AMPLIFIER, A LOCAL OSCILLATOR FOR GENERATING LOCAL OSCILLATIONS, A REFERENCE OSCILLATOR COUPLED TO SAID PHASE DETECTION MEANS, SAID PHASE DETECTION MEANS BEING RESPONSIVE TO THE COMBINED INPUTS FROM SAID INTERMEDIATE FREQUENCY AMPLIFIER AND SAID REFERENCE OSCILLATOR, PHASE SHIFTER MEANS COUPLED TO SAID LOCAL OSCILLATOR AND TO SAID PHASE DETECTION MEANS AND RESPONSIVE TO SAID PHASE DETECTION MEANS TO PRODUCE A PHASE SHIFT OF THE OSCILLATIONS FROM SAID LOCAL OSCILLATOR, MIXER CIRCUIT MEANS COUPLED TO SAID PHASE SHIFTER AND TO SAID REFERENCE OSCILLATOR AND RESPONSIVE TO SAID REFERENCE SIGNAL AND TO SAID OSCILLATIONS FOR PRODUCING A HETERODYNING SIGNAL HAVING AN UPPER SIDE BAND AND A LOWER SIDE BAND, AND CONTROL MEANS COUPLED TO SAID MIXER CIRCUIT MEANS FOR ALTERNATELY INTRODUCING SAID UPPER SIDE BAND AND SAID LOWER SIDE BAND OF SAID HETERODYNING SIGNAL TO THE HETERODYNE MIXER ON A TIME SHARED BASIS, SAID PHASE DETECTION MEANS, SAID PHASE SHIFTER
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) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |