Importance

Loading Importance Indicators...

Abstract

Pins of an integrated circuit are provided with timing axis signals for testing in the time axis without discrepancies. An electro-optic probe in proximity to a plurality of contact points of a device under test uses positions of equal distance or a pre-set distance as skew measurement points, and detects timing axis signals on each microstrip line, A phase detector detects the phase of the timing axis signals that the electro-optic probe detects, and a phase difference calculator finds the phase difference between the phase detected by the phase detector and a reference value. Phase control of the timing axis signals is carried out by a phase controller so as to cancel the obtained phase difference.

Loading the Abstract Image...

First Claim