Memory Connector Pin Switching for Stable DIMM Signal Integrity
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Solution Overview
Problem
The integrity of signals on memory connectors is compromised, and data transmission bandwidth is reduced due to sudden impedance changes when a DIMM is inserted into a remote memory connector, causing signal reflection and bifurcation.
Innovation Solution
A memory connection apparatus with a circuit board and signal line, featuring slidable pins on memory connectors that can connect or disconnect from the signal line based on the presence of a DIMM, preventing sudden impedance changes and ensuring only one connector is connected at a time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple memory connectors are connected to the same signal line, then memory expansion capability is improved, but signal integrity deteriorates due to sudden impedance changes and signal reflection
Solution Approach 1:
The pin is designed to be movable between two states: extended to contact the signal line when a DIMM is inserted, and retracted to disconnect from the signal line when no DIMM is present. This dynamic adjustment of connection state eliminates sudden impedance changes and signal reflection, resolving the contradiction between supporting multiple connectors and maintaining signal integrity
Solution Approach 2:
The movable pin acts as an intermediary element between the memory connector and the signal line. It controls the connection state based on DIMM presence, mediating the signal transmission to prevent impedance mismatch and signal reflection while allowing multiple connectors to be supported on the same signal line
Data Source
AI summary
This application discloses a memory connection apparatus, a memory connector, and a mainboard, and belongs to the field of computer technologies. A plurality of memory connectors are disposed on a circuit board of a memory connection apparatus for a same signal line, so that a pin of each memory connector can be connected to the signal line in a first state, and can be not in contact with the signal line in a second state. When a pin of one memory connector is in the first state, and a pin of a remaining memory connector is in the second state, the signal line is connected to only the one memory connector. In this case, no sudden impedance change occurs at a position that is on the signal line and at which no memory connector is connected.