| 摘要 |
PROBLEM TO BE SOLVED: To provide a backboard transmission method, a backboard transmission apparatus, and a substrate unit capable of eliminating the effect of a reflected wave at connectors due to impedance mismatching in high speed backboard transmission, accurately receiving pulses, and accurately discriminating bits. SOLUTION: The backboard transmission method comprises: a signal wave monitoring step of monitoring a signal wave for generating a cancellation wave with the same characteristic as a signal wave passed between a transmission-side substrate unit and a reception-side substrate unit and detecting a delay time and a gain of a reflected wave with respect to the signal wave; a delay adjustment step of performing delay adjustment with respect to the cancellation wave having a characteristic identical with that of the signal wave based on the delay time detected at the monitoring step; a gain adjustment step of performing gain adjustment with respect to the cancellation wave based on the gain detected at the monitoring step; and a reflected wave cancellation step of superimposing the cancellation wave generated through waveform adjustment of the cancellation wave generating signal wave subjected to the delay adjustment step and the gain adjustment step on the signal wave thereby canceling the reflected wave. COPYRIGHT: (C)2007,JPO&INPIT
|
