Patent EP0130730A1 successfully refreshed from Google Patents.
EP0130730A1
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EP
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Interconnection apparatus
Assignee: RCA Licensing Corp
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Filing: 1984-06-19
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Granted: —
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Expires: 2004-06-19
Abstract
Abstract A signal bus (8) has distributed along it distributed video components (10, 12) such as teletext decoder and a video tape recorder. A TV monitor (26) has connected directly to it other video components (14, 16, 18) which are thus regarded as non-distributed. To interconnect the distributed and non-distributed components, the monitor includes a first switch unit (32) which selectively connects the bus (8) and non-distributed components (14-18) to a signal processor (28) and a second switch unit which selectively connects the non-distributed components to the bus. A driver (36) terminates the bus in its characteristic impedance (as illustrated by resister 40).
Inventors
- 👤 Dal Frank Griepentrog
- 👤 William Adamson Lagoni
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 18:10
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/222; H04N5/262; H04N5/268; H04N5/44; H04N5/445
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
186 words
Interconnection apparatus for transferring signals between various components (10;12;14;16;18), characterized by first switch means (32) having a plurality of selectively conductive signal paths (A;B;C;D) having individual inputs (9;15;17;19) and a common output, one of said inputs (9) adapted to be coupled to a bi-directional signal bus (8) connected to at least one of said components (10;12) and the or each other (15;17;19) of said inputs adapted to be coupled to the or each other of said components (14;16;18) respecitvely second switch means (34) having a plurality of selectively conductive signal paths (A;B;C;D) having individual inputs and a common output,the or each of said inputs adapted to be coupled to the or each of said other components respectively; and a signal driver (36) having an input coupled to said output of said second switch means (34) and an output coupled to said input (9) of said first switch means adapted to be coupled to said signal bus, said output having an impedance (40) corresponding substantially to the characteristic impedance of said signal bus when supplying signal and substantially maintaining said characteristic output impedance when not supplying signal.
Claim 2
Dependent Claim
186 words
Interconnection apparatus for transferring signals between various components (10;12;14;16;18), characterized by first switch means (32) having a plurality of selectively conductive signal paths (A;B;C;D) having individual inputs (9;15;17;19) and a common output, one of said inputs (9) adapted to be coupled to a bi-directional signal bus (8) connected to at least one of said components (10;12) and the or each other (15;17;19) of said inputs adapted to be coupled to the or each other of said components (14;16;18) respecitvely second switch means (34) having a plurality of selectively conductive signal paths (A;B;C;D) having individual inputs and a common output,the or each of said inputs adapted to be coupled to the or each of said other components respectively; and a signal driver (36) having an input coupled to said output of said second switch means (34) and an output coupled to said input (9) of said first switch means adapted to be coupled to said signal bus, said output having an impedance (40) corresponding substantially to the characteristic impedance of said signal bus when supplying signal and substantially maintaining said characteristic output impedance when not supplying signal.
Claim 3
Dependent Claim
47 words
Apparatus as recited in Claim 1 wherein said signals correspond to video signals and said driver (36) maintains said output impedance (40) when said bi-directional signal bus (8) transfers video signal to said first switch means, so as to terminate said signal bus in its characteristic impedance.
Claim 4
Dependent Claim
27 words
Apparatus as recited in Claim 1 or 2 wherein said second switch means (34) has a second input adapted to be coupled to a reference potential (GND).
Claim 5
Dependent Claim
45 words
Apparatus as recited in claim 3 wherein said second switch means (34) couples said reference potential (GND) to the input of said driver so as to cause said driver to not supply video signal to said bus (8) while maintaining said characteristic output impedance (40).
Claim 6
Dependent Claim
25 words
5'. Apparatus as recited in Claim 6 wherein said output of said first switch means (32) is coupled to a video signal processing circuit (28).
Claim 7
Dependent Claim
27 words
Apparatus as recited in Claim 5 wherein said first and second switch means, signal driver and video signal processing circuit are all in a television monitor (26).
References Cited (Backward Citations)
DE1296186B
Cited
DE2028631B2
Cited
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