Patent US3172053A successfully refreshed from Google Patents.
US3172053A
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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 23:43
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)
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US2441957A
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US2744247A
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US3080453A
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US3059189A
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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) | 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 |