Memory module and memory system suitable for high speed...

Details Memory module and memory system suitable for high speed... Memory module and memory system suitable for high speed...

2006-03-21

2006-03-21

Elms, Richard (Department: 2824)

Static information storage and retrieval

Interconnection arrangements

C365S051000, C365S189030

Reexamination Certificate

active

07016212

ABSTRACT:
A memory module comprises a stab resistor between a pin and one end of a bus. A plurality of memory chips is connected to the bus between both ends thereof. A terminating resistor is connected to the other end of the bus. Stab resistance Rs of the stab resistor and terminating resistance Rterm of the terminating resistor are given by:in-line-formulae description="In-line Formulae" end="lead"?Rs=(N−1)×Zeffdimm/N,andin-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?Rterm=Zeffdimmin-line-formulae description="In-line Formulae" end="tail"?where N represents the number of the memory modules in a memory system; and Zeffdimm, effective impedance of a memory chip arrangement portion consisting of the bus and the memory chips. In the memory system, the memory modules are connected to a memory controller on a motherboard in a stab connection style. Wiring impedance Zmb of the motherboard is given by:in-line-formulae description="In-line Formulae" end="lead"?Zmb=(2N−1)×Zeffdimm/N2.in-line-formulae description="In-line Formulae" end="tail"?

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