US3205442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic adjustable equalizer for signal amplitude variations
Assignee: AT&T Inc
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Filing: 1961-12-21
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Granted: 1965-09-07
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Expires: 1981-12-21
Abstract
No abstract record available.
Inventors
- 👤 Anastasios P Stamboulis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:19
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/02; H04L25/03; H04L25/03006; H04L25/03012; H04L25/03019; G; G06; G06G; G06G7/00; G06G7/12; G06G7/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
AN AUTOMATIC EQUALIZER FOR FREQUENCY MODULATED SIGNALS HAVING UNDESIRED AMPLITUDE MODULATION, SAID EQUALIZER COMPRISING A LOGARITHMIC NETWORK RECEIVING SAID SIGNALS AND PRODUCING IN ITS OUTPUT SAID FREQUENCY MODULATED SIGNALS WITH THE DEGREE OF AMPLITUDE MODULATION BEING MODIFIED TO BE PROPORTIONAL TO THE TRAMSMISSION EQUIVALENT OF THE AMPLITUDE MODULATION ON THE SIGNALS AT THE INPUT TO SAID NETWORK, MEANS GENERATING A CONTROL SIGNAL WITH AN AMPLITUDE WHICH IS A FUNCTION OF THE AMOUNTT OF AMPLITUDE MODULATION IN SIGNALS AT THE OUTPUT OF SAID NETWORK, AND MEANS RESPONSIVE TO SAID FREQUENCY MODULATED SIGNALS AND TO SAID CONTROL SIGNAL FOR PRODUCING SAID FREQUENCY MODULATED SIGNALS WITH SUBSTANTIALLY NO AMPLITUDE MODULATION.
Claim 2
Dependent Claim
107 words
AN AUTOMATIC EQUALIZER FOR FREQUENCY MODULATED SIGNALS HAVING UNDESIRED AMPLITUDE MODULATION, SAID EQUALIZER COMPRISING A LOGARITHMIC NETWORK RECEIVING SAID SIGNALS AND PRODUCING IN ITS OUTPUT SAID FREQUENCY MODULATED SIGNALS WITH THE DEGREE OF AMPLITUDE MODULATION BEING MODIFIED TO BE PROPORTIONAL TO THE TRAMSMISSION EQUIVALENT OF THE AMPLITUDE MODULATION ON THE SIGNALS AT THE INPUT TO SAID NETWORK, MEANS GENERATING A CONTROL SIGNAL WITH AN AMPLITUDE WHICH IS A FUNCTION OF THE AMOUNTT OF AMPLITUDE MODULATION IN SIGNALS AT THE OUTPUT OF SAID NETWORK, AND MEANS RESPONSIVE TO SAID FREQUENCY MODULATED SIGNALS AND TO SAID CONTROL SIGNAL FOR PRODUCING SAID FREQUENCY MODULATED SIGNALS WITH SUBSTANTIALLY NO AMPLITUDE MODULATION.
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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |