METHOD AND APPARATUS FOR IMPROVING DIFFERENTIAL DIRECT CURRENT (DC) MEASUREMENT ACCURACY

摘要

A method of error correction in automated test equipment (ATE) is presented. The method comprises calibrating the ATE using a calibration board, wherein the calibration board comprises a reference voltage. The calibrating comprises: (a) measuring the reference voltage using a reference channel and each of a plurality of channels in the ATE; (b) recording a series of differential voltage measurement values obtained from the measuring in a calibration module; and (c) calculating a respective correction factor for each of the plurality of channels utilizing the series of differential voltage measurement values. The method further comprises obtaining a measured voltage value for a DUT connected to a first channel in the ATE, wherein the first channel is one of the plurality of channels. Finally, the method comprises correcting the measured voltage value using a respective correction factor for said first channel.

主权项

1. A method of error correction in automated test equipment (ATE), said method comprising:
calibrating said ATE using a calibration board, wherein said calibration board comprises a reference voltage and wherein said calibrating comprises:
measuring said reference voltage using a reference channel and each ofa plurality of channels in said ATE;recording a series of differential voltage measurement values obtained from said measuring in a calibration module; andcalculating a respective correction factor for each of said plurality of channels utilizing said series of differential voltage measurement values; measuring a voltage value for a DUT connected to a first channel in said ATE, wherein said first channel is one of said plurality of channels; and correcting said measured voltage value using a respective correction factor for said first channel.