Information processing apparatus and backboard having on backboard side matching resistors suited to modules connected thereto
US5821767A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1996 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | Apr 15, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0292
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In an information processing apparatus including a backboard having a bus for transmitting signals therethrough, at least one module, and a connector to connect the bus to the module, the backboard includes two terminators disposed respectively at both ends of the bus for providing matched termination according to a characteristic impedance of the bus to which the module is connected and a matching resistor disposed between the bus and the module. The matching resistor has a resistance value Rm represented as EQU Rm=Z1.multidot.k-Z0/2(0.8<k<1.3) where, Z1 indicates a characteristic impedance of the module, Z0 denotes the characteristic impedance of the bus, and k stands for a coefficient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.