ESD Detection Circuitry with Noise-Filtered Logging
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Solution Overview
Problem
Existing electronic circuits lack effective mechanisms to log and manage electrostatic discharge (ESD) events, which can cause damage to sensitive devices and are not adequately addressed by current ESD protection systems.
Innovation Solution
An ESD logging system comprising ESD detection circuitry, capture circuitry, and logic circuitry that detects ESD events, delays the detection signal to mitigate noise, and generates a logic output to log the events, enabling the storage of ESD data for analysis and maintenance purposes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ESD detection circuitry is added to detect ESD events, then the ability to identify ESD events is improved, but the device complexity increases
Solution Approach 1:
The ESD detection circuitry is merged with the existing ESD protection circuit by utilizing the same physical nodes and shared circuit elements. The detection functionality is integrated into the protection circuit structure, allowing simultaneous protection and detection without adding completely separate circuitry.
Solution Approach 2:
The ESD protection circuit is designed to serve multiple functions: providing actual ESD protection while simultaneously detecting ESD events. The same circuit nodes and components are used for both protection operation and event detection, making the circuit multi-functional and reducing overall system complexity.
2Loss of information
If capture circuitry is added to capture ESD event data, then the logging capability is improved, but the device complexity increases
Solution Approach 1:
The capture circuitry is pre-configured with memory elements and logic circuits that are ready to immediately capture and store ESD event data when detected. The circuit includes pre-established capture triggers and storage mechanisms that activate automatically upon ESD detection, eliminating the need for complex real-time processing during the event.
3Measurement precision
If delay circuitry is added to mitigate noise in detection signals, then the signal quality is improved, but the device complexity increases
Solution Approach 1:
A delay circuit is introduced as an intermediary element between the ESD detection circuitry and the capture circuitry. This delay circuit filters out noise and transient artifacts from the detection signal while preserving the actual ESD event characteristics, providing signal conditioning without requiring complex filtering algorithms or additional processing stages.
Data Source
AI summary
An electrostatic discharge (ESD) logging system includes ESD detection circuitry having at least one input electrically connected coupled to a node of an ESD protection circuit. The ESD detection circuitry provides a detector signal in response to detecting an ESD event at the node of the ESD protection circuit. Capture circuitry is electrically connected to an output of the ESD event detector. The capture circuitry asserts a capture signal to indicate the occurrence of the ESD event in response to the detector signal. A logic circuit provides a logic output in response to the capture signal.