CURRENT MEASUREMENT SYSTEM

摘要

A current measurement system precisely measures a current generated by a circuit under test. The current measurement system has a sampling unit serially connected to the circuit under test for the acquisition of a first voltage. The first voltage is amplified and transformed to a second voltage by an amplifying unit. A noise suppression unit filters analog voltage noises produced from the second voltage and transforms the second voltage to a third voltage. The third voltage is converted into a voltage signal in a digital format by a conversion unit. The voltage signal undergoes calibrations and turns into a measure signal by using a processing unit and a stored calibration linear equation. The measure signal indicates a precise measurement of the current. A memory unit stores a gradient and a bias voltage level required for the calibration linear equation.