Patent US2085706A successfully refreshed from Google Patents.
US3147441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase modulation receiver containing a parametric amplifier
Assignee: Zenith Electronics LLC
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Filing: 1961-05-26
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Granted: 1964-09-01
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Expires: 1981-05-26
Abstract
No abstract record available.
Inventors
- 👤 Adler Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:34
CPC Classifications
H; H03; H03D; H03D3/00; H03D3/02; H03D3/24; H03D3/241; H03D3/242
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PHASE-LOCKED WAVE-SIGNAL RECEIVER COMPRISING: A SYNCHRONOUSLY-PUMPED PARAMETRIC AMPLIFIER IN WHICH WAVE SIGNAL COMPONENTS IN QUADRATURE TO THE HALF-PUMP PHASE ARE SUPPRESSED AND SIGNAL COMPONENTS IN PHASE WITH THE HALF-PUMP PHASE ARE AMPLIFIED; MEANS FOR MAINTAINING THE AVERAGE PHASE OF A RECEIVED WAVE SIGNAL IN QUADRATURE TO THE HALF-PUMP PHASE; MEANS FOR INTRODUCING INDICATING SIGNAL ENERGY, HAVING A FREQUENCY WITHIN THE INTELLIGENCE SIGNAL PASSBAND OF SAID AMPLIFIER, INTO THE AMPLIFYING CHANNEL OF SAID PARAMETRIC AMPLIFIER TO PHASE-MODULATE THE AMPLIFIED SIGNAL; AND AMPLITUDE-SENSITIVE MEANS COUPLED TO THE OUTPUT OF SAID AMPLIFIER AND RESPONSIVE TO SAID INDICATING SIGNAL ENERGY FOR DEVELOPING A CONTROL SIGNAL INDICATIVE OF THE AMPLITUDE OF THE CARRIER OF SAID WAVE SIGNAL.
Claim 2
Dependent Claim
113 words
A PHASE-LOCKED WAVE-SIGNAL RECEIVER COMPRISING: A SYNCHRONOUSLY-PUMPED PARAMETRIC AMPLIFIER IN WHICH WAVE SIGNAL COMPONENTS IN QUADRATURE TO THE HALF-PUMP PHASE ARE SUPPRESSED AND SIGNAL COMPONENTS IN PHASE WITH THE HALF-PUMP PHASE ARE AMPLIFIED; MEANS FOR MAINTAINING THE AVERAGE PHASE OF A RECEIVED WAVE SIGNAL IN QUADRATURE TO THE HALF-PUMP PHASE; MEANS FOR INTRODUCING INDICATING SIGNAL ENERGY, HAVING A FREQUENCY WITHIN THE INTELLIGENCE SIGNAL PASSBAND OF SAID AMPLIFIER, INTO THE AMPLIFYING CHANNEL OF SAID PARAMETRIC AMPLIFIER TO PHASE-MODULATE THE AMPLIFIED SIGNAL; AND AMPLITUDE-SENSITIVE MEANS COUPLED TO THE OUTPUT OF SAID AMPLIFIER AND RESPONSIVE TO SAID INDICATING SIGNAL ENERGY FOR DEVELOPING A CONTROL SIGNAL INDICATIVE OF THE AMPLITUDE OF THE CARRIER OF SAID WAVE SIGNAL.
References Cited (Backward Citations)
US2969459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |