Digital data communication system
AssigneeThe Boeing Company
InventorsRandall K. B. Chun, Donn E. Larsen
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Abstract
A digital data communication system including a data source and a source interface, a digital data bus, for transferring encoded information from the data source to one or more receivers, each having a receiver interface. The source interface is adaptable for controlling the rise and fall times of the signals on the bus at a plurality of frequencies. It is directly coupled to the bus and terminates the bus in its characteristic impedance. The receiver interface operates at a plurality of frequencies and is directly coupled to the bus.
Claims20
A digital data communication system for transferring digital information from a source to one or more receivers, comprising:
- source interface means for receiving digital signals generated by the source and producing encoded digital signals while controlling their rise and fall times on the basis of two source generated signal frequencies;
- receiver interface means for decoding said encoded digital signals into digital signals representative of said source generated digital signals for presentation to a receiver;
- and bus means operatively associated with said source interface means and said receiver interface means for transferring said encoded digital signals from said source interface means to said receiver interface means.
A source interface circuit for presenting information to bus means, comprising:
- means for receiving digital signals generated by a source and producing encoded digital signals;
- means responsive to said encoded digital signals for controlling their rise and fall times on the basis of two source generated signal frequencies, and means for presenting said encoded digital signals to the bus means.
A receiver interface circuit for receiving encoded digital signals representative of source generated digital signals transmitted via bus means, comprising:
- means for decoding said encoded digital signals into digital signals representative of the source generated signals for presentation to a receiver, differential input signal amplifier means for receiving said encoded digital signals and converting them into encoded bipolar signals indicative of the presence of logical ones and logical zeros, ones detector means responsive to said encoded bipolar signals for producing a ones signal indicative of the presence of a logical one, zeros detector means responsive to said encoded bipolar signal for producing a zeros signal indicative of the presence of a logical zero, data decoder means responsive to said ones signal and said zeros signal for producing a binary data signal for presentation to the receiver, clock decoder means responsive to said ones signal and said zeros signal for producing a binary clock signal for presentation to the receiver, and sync decoder means responsive to said binary clock signal and an external control signal for producing a binary sync signal for presentation to the receiver, whereby said data signal, clock signal and sync signal are representative of the source generated signals.
Dependencies are inferred from the claim text.