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Resettable Optical ESD Sensor Latch Disclosure Number: IPCOM000232427D
Publication Date: 2013-Nov-07
Document File: 2 page(s) / 67K

Publishing Venue

The Prior Art Database


Described is a method for sensing an electrostatic discharge event with programmable threshold with minimal disruption to the electromagnetic environment.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 72% of the total text.

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Resettable Optical ESD Sensor Latch

The issue with tracking down an electrostatic discharge (ESD) problem in any electronics is twofold; first, the mere entrance of test cables into the enclosure produces a break in the integrity of the shielding, and two, if the entrance is made by conducting cables, then the shielding is compromised by adding antennas from the inside to the outside of the enclosure. Using conductive test cabling will introduce differential and common mode noise into the electronics because the ESD pulse couples energy onto the sensor lines and brings it into the enclosure, confounding the results.

    If fiber optics are used for entrance into the enclosure through an existing opening, e.g., a portion of a perf pattern for thermal cooling, then both problems are solved. Described is a module for detecting an ESD threshold or upset level within an electronic device. The circuit module consists of a power conversion module that converts the incoming light power to energy that is needed by the rest of the unit to operate. Converted input light for the photo voltaic (PV) power is output regulated and used by the remainder of the module for setting the proper operation and voltage threshold levels. An ESD or voltage level that exceeds the calibrated comparator level turns the latch on and holds the LED in the on condition. This signal, and signals from multiple modules, is routed back through an existing hole or aperture to the attention of the technic...