H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 5/14 (2006.01) H04L 7/08 (2006.01)
Patent
CA 2290239
A digital communication system is presented implementing a data transmission method which allows each of a pair of communication devices coupled to a transmission line to both transmit and receive data during each cycle of a clock signal (i.e., simultaneous bidirectional data transmission). The digital communication system includes a first and second communication devices coupled to opposite ends of a transmission line. Both the first and second communication devices operate in response to a periodic clock signal. The first and second communication devices simultaneously: (i) drive an output data signal upon the transmission line during a first portion of a period of the clock signal, and (ii) receive an input signal from the transmission line during a remainder of the period of the clock signal. The communication devices may be coupled to receive the clock signal via a clock signal line, or may include circuitry to generate and synchronize two separate clock signals. One embodiment of an input/output driver circuit is described, along with timing requirements which must be observed in order to achieve simultaneous bidirectional data transmission.
Goudreau Gage Dubuc
Sun Microsystems Inc.
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