Connector Spring Pin ESD Protection Signal Integrity
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Solution Overview
Problem
Current ESD protection components near input/output interfaces in computing systems increase transmission line loss and reduce signal integrity as signal rates increase, necessitating a method to provide ESD protection without introducing insertion loss.
Innovation Solution
The implementation involves a connector port with multiple signal pins, where at least one signal pin is connected to a ground reference voltage level through a spring pin, ensuring it is not floating, and a head contact with a floating signal pin that becomes connected to the grounded pin, allowing ESD protection by equalizing potentials and preventing further discharges once fully inserted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ESD protection components are placed near the input/output interface, then ESD protection is provided, but transmission line loss increases and signal integrity deteriorates
Solution Approach 1:
The ESD protection function is extracted from the traditional location near the input/output interface and relocated to the connector port itself. By placing the protection mechanism at the connector, the harmful ESD effects are neutralized before they can propagate into the transmission line, thereby avoiding signal integrity deterioration and transmission line loss while maintaining effective ESD protection.
2Reliability
If ESD protection components are added near the input/output interface, then ESD protection is improved, but device complexity increases
Solution Approach 1:
The ESD protection function is merged with the connector port structure itself rather than being implemented as separate protection components near the input/output interface. This integration eliminates the need for additional discrete ESD protection circuitry in the signal path, reducing device complexity while maintaining comprehensive ESD protection at the point of entry.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively prevents electrostatic discharges while maintaining signal integrity by ensuring all signal pins are at the same electrical potential, allowing for high data rates without the need for additional ESD protection circuitry.
Implementation Method 1
When two nodes have a different electrical potential, such as different electrical charge accumulation, and the two nodes are electrically connected, an electrostatic discharge (ESD) occurs
Data Source
AI summary
A system and method for efficient methods and systems for input/output port protection from electrostatic discharge events are described. In various implementations, an integrated circuit mounted on a printed circuit board includes a connector port that uses a first signal pin within a metal shell mounted on the printed circuit board and is electrically connected to a ground reference. The first signal pin is electrically connected to the ground reference though a spring pin located between itself and the shell. A user inserts a head contact of a cable into the connector port. The head contact includes a second signal pin that is floating, but becomes connected to the ground reference when brought into physical contact with the first signal pin. During later insertion, the head contact pushes the spring pin causing physical disconnection of the spring pin from the first signal pin allowing data transmission to begin.