Memory Socket Branching Point Equalizes Signal Reflections
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Solution Overview
Problem
Current memory module sockets face challenges in maintaining signal integrity and speed due to varying signal reflections caused by different impedances in signaling paths between processors and memory modules, leading to degraded performance.
Innovation Solution
The design incorporates a socket with a branching point that equalizes signal reflections by ensuring all memory modules connect through branches of equal or substantially equal length, eliminating the need for customized drive strengths and improving signal integrity and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If memory modules are connected through sockets with varying path lengths, then the socket structure can accommodate multiple memory modules, but signal reflections and impedance variations degrade signal integrity and speed
Solution Approach 1:
The socket design ensures that all signaling paths from the processor to each memory module socket have equal length and equal impedance characteristics. This equipotential approach eliminates signal reflection variations and impedance mismatches, ensuring uniform signal quality across all memory modules connected through the socket.
2Reliability
If different drive strengths are used for different memory modules, then signal integrity can be maintained, but the socket design becomes more complex and requires customization
Solution Approach 1:
The socket is designed with uniform signaling path characteristics for all memory module connections. All paths have equal length and equal impedance, creating homogeneous signal transmission conditions. This eliminates the need for customized drive strengths or complex per-module configurations, as all modules operate under identical electrical conditions.
Data Source
Figure 1A~1B
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AI summary
An apparatus includes a memory module socket having a base end and a branching point. The base end is coupled to a printed circuit board (PCB). The branching point is external to the PCB. A first branch extends from the branching point at an angle θ1, where 90 < θ1 < 180, and a second branch extends from the branching point at an angle θ2, where 90 < θ2 < 180. A method includes signaling between the PCB and a first memory module and a second memory module via a base end of the memory module socket. The memory module socket connects to the PCB via the base end. The signaling is branched at a branching point of the memory module socket to the first memory module via a first branch and to the second memory module via a second branch. The branching is external to the PCB.