US3332038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multichannel system comprising matching resistors of the same order of magnitude as the filter networks to which they are coupled
Assignee: The General Electric Company PLC
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Filing: 1965-02-12
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Granted: 1967-07-18
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Expires: 1985-02-12
Abstract
No abstract record available.
Inventors
- 👤 Stanley Brian Anthony
- 👤 Clay David Langsford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:51
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/34; H04; H04J; H04J1/00; H04J1/02; H04J1/06; H04J1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
AN ELECTRIC CIRCUIT FOR USE IN A MULTICHANNEL SIGNALLING SYSTEM IN WHICH THE CHANNELS ARE COMBINED IN FREQUENCY DIVISION MULTIPLEX, SAID CIRCUIT COMBINING SIGNALS FROM A PLURALITY OF SAID CHANNELS, SAID CIRCUIT COMPRISING: (A) A PLURALITY OF CIRCUITS EACH ADAPTED TO CARRY THE SIGNALS ON AT LEAST ONE OF SAID CHANNELS, (B) A LIKE PLURALITY OF FILTER NETWORKS EACH HAVING FIRST AND SECOND OUTPUT TERMINALS BETWEEN WHICH TERMINALS SAID FILTER NETWORKS RESPECTIVELY PRESENT CHARACTERISTIC IMPEDANCES OF A GIVEN ORDER OF MAGNITUDE, (C) MEANS TO COUPLE EACH OF SAID FILTER NETWORKS TO A RESPECTIVE ONE OF SAID PLURALITY OF CIRCUITS, (D) A LIKE PLURALITY OF RESISTORS HAVING VALVES OF THE SAME ORDER OF MAGNITUDE, (E) A WIDEBAND AMPLIFIER THAT IS COUPLED TO A COMMON SIGNAL TRANSMISSION PATH OF THE SYSTEM AND WHICH HAS FIRST AND SECOND INPUT TERMINALS BETWEEN WHICH SAID AMPLIFIER PRESENTS AN IMPEDANCE AT LEAST AN ORDER OF MAGNITUDE LOWER THAN THAT OF SAID CHARACTERISTIC OUTPUT IMPEDANCES OF THE FILTER NETWORKS,
Claim 2
Dependent Claim
162 words
AN ELECTRIC CIRCUIT FOR USE IN A MULTICHANNEL SIGNALLING SYSTEM IN WHICH THE CHANNELS ARE COMBINED IN FREQUENCY DIVISION MULTIPLEX, SAID CIRCUIT COMBINING SIGNALS FROM A PLURALITY OF SAID CHANNELS, SAID CIRCUIT COMPRISING: (A) A PLURALITY OF CIRCUITS EACH ADAPTED TO CARRY THE SIGNALS ON AT LEAST ONE OF SAID CHANNELS, (B) A LIKE PLURALITY OF FILTER NETWORKS EACH HAVING FIRST AND SECOND OUTPUT TERMINALS BETWEEN WHICH TERMINALS SAID FILTER NETWORKS RESPECTIVELY PRESENT CHARACTERISTIC IMPEDANCES OF A GIVEN ORDER OF MAGNITUDE, (C) MEANS TO COUPLE EACH OF SAID FILTER NETWORKS TO A RESPECTIVE ONE OF SAID PLURALITY OF CIRCUITS, (D) A LIKE PLURALITY OF RESISTORS HAVING VALVES OF THE SAME ORDER OF MAGNITUDE, (E) A WIDEBAND AMPLIFIER THAT IS COUPLED TO A COMMON SIGNAL TRANSMISSION PATH OF THE SYSTEM AND WHICH HAS FIRST AND SECOND INPUT TERMINALS BETWEEN WHICH SAID AMPLIFIER PRESENTS AN IMPEDANCE AT LEAST AN ORDER OF MAGNITUDE LOWER THAN THAT OF SAID CHARACTERISTIC OUTPUT IMPEDANCES OF THE FILTER NETWORKS,
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) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |