US Patent 11428732 Self-calibrating deskew fixture

A deskew fixture includes first and second deskew probe points for contacting first and second probes, respectively, during deskew calibration, a signal generating circuit for generating a calibration signal provided to the first and second deskew probe points, and a feedback loop for automatically self-calibrating the deskew fixture. The feedback loop includes first and second analog to digital converters (ADCs) for digitizing the calibration signal at the first and second deskew probe points while contacting the first and second probes, respectively, to provide first and second digitized calibration signals, and a processing unit programmed to determine inherent skew of the deskew fixture between the first and second skew probe points using the first and second digitized calibration signals, and to provide the determined inherent skew to a test instrument for use in the deskew calibration of the first and second probes.