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US3217263A
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Frequency demodulation circuit arrangement
Assignee: US Philips Corp
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Filing: 1960-12-16
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Granted: 1965-11-09
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Expires: 1980-12-16
Abstract
No abstract record available.
Inventors
- 👤 Starreveld Jaap
- 👤 Zadel Wim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:39
CPC Classifications
H; H03; H03D; H03D3/00; H03D3/02; H03D3/06; H03D3/14; H03D3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A CIRCUIT FOR FREQUENCY DEMODULATION OF ELECTRIC SIGNALS COMPRISING A SOURCE OF SAID SIGNALS HAVING FIRST AND SECOND TERMINALS, A LOOP CIRCUIT RESONANT AT THE CENTER FREQUENCY OF SAID SIGNALS AND HAVING FIRST, SECOND AND THIRD ARMS, SAID ARMS BEING CAPACITIVE, INDUCTIVE AND RESISTIVE RESPECTIVELY AT SAID CENTER FREQUENCY, MEANS CONNECTING THE JUNCTION OF SAID FIRST AND SECOND ARMS
Claim 2
Dependent Claim
59 words
A CIRCUIT FOR FREQUENCY DEMODULATION OF ELECTRIC SIGNALS COMPRISING A SOURCE OF SAID SIGNALS HAVING FIRST AND SECOND TERMINALS, A LOOP CIRCUIT RESONANT AT THE CENTER FREQUENCY OF SAID SIGNALS AND HAVING FIRST, SECOND AND THIRD ARMS, SAID ARMS BEING CAPACITIVE, INDUCTIVE AND RESISTIVE RESPECTIVELY AT SAID CENTER FREQUENCY, MEANS CONNECTING THE JUNCTION OF SAID FIRST AND SECOND ARMS
References Cited (Backward Citations)
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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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |