Coaxial cable/fiber optic bus network
First Claim
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1. A network system for distributing digital information comprising:
- a coaxial line for bussing a main data signal at relatively high frequencies and bussing power at relatively low frequencies;
at least one tap means for electrically interfacing with said coaxial line, comprising;
a. receiving means for sampling said main signal, said receiving means including transducing means for transforming said sampled main signal into a light signal for output, and optical splitting means for changing said light signal output into a multiple output for distribution to multiple peripheral machines;
b. driving means including optical transducing means for changing light signal inputs from said multiple peripheral machines into an electrical input signals, and means for driving a signal along said coaxial line in response to said electrical input signals, and switching means for connecting and disconnecting said driving means from said coaxial line; and
c. conversion means responsive to said power frequencies for supplying operating power to said receiving and driver means.
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Abstract
A coaxial cable/fiber optic bus network utilizes a coaxial cable for the main signal bus in a distribution system. The tap samples the electrical signal, and transforms the signal into a light pulse output. An optical splitter changes the single light output into a multiple output for serving a maximum number of peripheral units. Similarly, the input port on the tap uses a like optical splitter to recombine signal paths from the peripherals, in driving the coaxial line. Circuitry for incorporation in the tap provides a matching impedance when driving the coaxial line, and a high impedance on the line during the off-time in order to reduce line loading.
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3 Claims
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1. A network system for distributing digital information comprising:
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a coaxial line for bussing a main data signal at relatively high frequencies and bussing power at relatively low frequencies; at least one tap means for electrically interfacing with said coaxial line, comprising; a. receiving means for sampling said main signal, said receiving means including transducing means for transforming said sampled main signal into a light signal for output, and optical splitting means for changing said light signal output into a multiple output for distribution to multiple peripheral machines; b. driving means including optical transducing means for changing light signal inputs from said multiple peripheral machines into an electrical input signals, and means for driving a signal along said coaxial line in response to said electrical input signals, and switching means for connecting and disconnecting said driving means from said coaxial line; and c. conversion means responsive to said power frequencies for supplying operating power to said receiving and driver means. - View Dependent Claims (2, 3)
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Specification