Enhanced grounding system for short-wire lengthed fixture

Details Enhanced grounding system for short-wire lengthed fixture Enhanced grounding system for short-wire lengthed fixture

1991-08-07

1994-04-19

Nguyen, Vinh

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324158P, G01R 3102, G01R 106

Patent

active

053049217

ABSTRACT:
Grounding technology is provided for a short-wire, circuit board test fixture. As a result of the grounding technology, the ground between a circuit board test system and a circuit board under test can be reliably controlled. The grounding technology provides testing at extremely higher speeds by minimizing ground bounce. An internal ground plane is situated in the test fixture. Pursuant to one embodiment of the invention, a coax assembly at ground potential surrounds critical signal paths between the internal ground plane and an alignment plate situated at the bottom of the test fixture. Either a conductive alignment plate or a conductive ground comb affixed to a non-conductive alignment plate is implemented to permit conduction of the ground signal between the board test system and the coax assembly. In another embodiment, an array of ground personality pins provides conduction of the ground signal between the internal ground plane and the board test system. The ground personality pins are clustered around critical signal paths to control impedance.

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