US3217096A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal coupling and trap network
Assignee: Motorola Solutions Inc
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Filing: 1961-06-02
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Granted: 1965-11-09
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Expires: 1981-06-02
Abstract
No abstract record available.
Inventors
- 👤 Gerald L Caprio
- 👤 Lawrence J Mattingly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:47
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/4446
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN A TRANSISTORIZED TELEVISION RECEIVER THE COMBINATION OF A MIXER CIRCUIT INCLUDING A FIRST TRANSISTOR HAVING A COLLECTOR ELECTRODE, AN INTERMEDIATE FREQUENCY AMPLIFIER CIRCUIT INCLUDING A SECOND TRANSISTOR HAVING A BASE ELECTRODE, A PARALLEL RESONANT CIRCUIT CONNECTED TO SAID COLLECTOR ELECTRODE, A SERIES TUNED CIRCUIT CONNECTED BETWEEN SAID PARALLEL RESONANT CIRCUIT AND SAID BASE ELECTRODE, A FIRST SERIES RESONANT TRAP CONNECTED BETWEEN ONE TERMINAL OF SAID SERIES TUNED CIRCUIT AND A REFERENCE POINT, A SECOND SERIES RESONANT TRAP CONNECTED BETWEEN ANOTHER TERMINAL OF SAID SERIES TUNED CIRCUIT AND THE REFERENCE POINT, SAID FIRST AND SECOND TRAPS INCLUDING RESPECTIVE INDUCTORS MUTUALLY INTERCOUPLED WITH A PHASE TO TRANSLATE SIGNALS OF THE TRAP FREQUENCY RANGE AROUND SAID TERMINALS OF SAID SERIES TUNED CIRCUIT FOR CANCELLING SUCH SIGNAL AS TRANSLATED BETWEEN SAID TERMINALS.
Claim 2
Dependent Claim
129 words
IN A TRANSISTORIZED TELEVISION RECEIVER THE COMBINATION OF A MIXER CIRCUIT INCLUDING A FIRST TRANSISTOR HAVING A COLLECTOR ELECTRODE, AN INTERMEDIATE FREQUENCY AMPLIFIER CIRCUIT INCLUDING A SECOND TRANSISTOR HAVING A BASE ELECTRODE, A PARALLEL RESONANT CIRCUIT CONNECTED TO SAID COLLECTOR ELECTRODE, A SERIES TUNED CIRCUIT CONNECTED BETWEEN SAID PARALLEL RESONANT CIRCUIT AND SAID BASE ELECTRODE, A FIRST SERIES RESONANT TRAP CONNECTED BETWEEN ONE TERMINAL OF SAID SERIES TUNED CIRCUIT AND A REFERENCE POINT, A SECOND SERIES RESONANT TRAP CONNECTED BETWEEN ANOTHER TERMINAL OF SAID SERIES TUNED CIRCUIT AND THE REFERENCE POINT, SAID FIRST AND SECOND TRAPS INCLUDING RESPECTIVE INDUCTORS MUTUALLY INTERCOUPLED WITH A PHASE TO TRANSLATE SIGNALS OF THE TRAP FREQUENCY RANGE AROUND SAID TERMINALS OF SAID SERIES TUNED CIRCUIT FOR CANCELLING SUCH SIGNAL AS TRANSLATED BETWEEN SAID TERMINALS.
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) | 1968-11-08 | 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 |