US3172053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced frequency detector circuit
Assignee: Hazeltine Research Inc
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Filing: 1961-01-24
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Granted: 1965-03-02
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Expires: 1981-01-24
Abstract
No abstract record available.
Inventors
- 👤 Stephen P Ronzheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:42
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/86; H04H20/88; H03; H03D; H03D3/00; H04B; H04B14/00; H04B14/08; H04J; H04J1/00; H04J1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A BALANCED FREQUENCY DETECTOR CIRCUIT FOR THE SUBCARRIER CHANNEL OF AN FM/FM MULTIPLED SIGNAL RECEIVER COMPRISING: MEANS FOR SUPPLYING A SUBCARRIER SIGNAL WHICH MAY BE BOTH FREQUENCY- AND AMPLITUDE-MODULATED; MEANS FOR AMPLITUDE-LIMITING THE SUBCARRIER, AND INCLUDING IMPEDANCE MEANS FOR DERIVING A MEASURE OF SAID SUBCARRIER AMPLITUDE-MODULATION; MEANS FOR DERIVING FROM THE LIMITED SIGNAL A SERIES OF PULSES HAVING AN AVERAGE AMPLITUDE COMPONENT DETERMINED BY BOTH SAID FREQUENCY- AND AMPLITUDE-MODULATION OF THE SUBCARRIER; AND MEANS FOR UTILIZING SAID DERIVED MEASURE OF AMPLITUDE-MODULATION TO SUBSTANTIALLY REDUCE THE EFFECT THE SUBCARRIER AMPLITUDEMODULATION HAS ON THE AVERAGE AMPLITUDE COMPONENT OF THE PULSE SERIES.
Claim 2
Dependent Claim
99 words
A BALANCED FREQUENCY DETECTOR CIRCUIT FOR THE SUBCARRIER CHANNEL OF AN FM/FM MULTIPLED SIGNAL RECEIVER COMPRISING: MEANS FOR SUPPLYING A SUBCARRIER SIGNAL WHICH MAY BE BOTH FREQUENCY- AND AMPLITUDE-MODULATED; MEANS FOR AMPLITUDE-LIMITING THE SUBCARRIER, AND INCLUDING IMPEDANCE MEANS FOR DERIVING A MEASURE OF SAID SUBCARRIER AMPLITUDE-MODULATION; MEANS FOR DERIVING FROM THE LIMITED SIGNAL A SERIES OF PULSES HAVING AN AVERAGE AMPLITUDE COMPONENT DETERMINED BY BOTH SAID FREQUENCY- AND AMPLITUDE-MODULATION OF THE SUBCARRIER; AND MEANS FOR UTILIZING SAID DERIVED MEASURE OF AMPLITUDE-MODULATION TO SUBSTANTIALLY REDUCE THE EFFECT THE SUBCARRIER AMPLITUDEMODULATION HAS ON THE AVERAGE AMPLITUDE COMPONENT OF THE PULSE SERIES.
References Cited (Backward Citations)
US2399091A
Cited
US2379688A
Cited
US2441957A
Cited
US2744247A
Cited
US3080453A
Cited
US3059189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |