Control device
AssigneeHitachi, Ltd.
InventorsGoro HAMAMOTO, Tatsuyuki OOTANI, Yutaka UEMATSU, Jouji MATSUSHITA
Life of this patent
Estimating the term…
Abstract
Main wiring including a plurality of differential transmission lines for transmitting differential signals is formed on a motherboard. Termination resistors, provided at both ends of each of the plurality of differential transmission lines, connect the plurality of differential transmission lines to each other. A plurality of daughter boards are connected in parallel to each other via the main wiring. A line characteristic impedance of each differential transmission line is higher than a termination resistance value, which is a resistance value of the termination resistor.
Claims7
A control device comprising:
- a master board with a main wiring formed, the main wiring including a plurality of differential transmission lines for transmitting differential signals;
- termination resistors provided at both ends of each of the plurality of differential transmission lines, the termination resistors connecting the plurality of differential transmission lines to each other;
- and
- a plurality of control boards connected in parallel to each other via the main wiring,
- wherein a characteristic impedance of each differential transmission line is higher than a termination resistance value that is a resistance value of the termination resistor.
Dependencies are inferred from the claim text.