VOLTAGE SENSE MEASUREMENT UNIT WITH MINIMIZED COMMON MODE ERRORS

摘要

VOLTAGE SOURCE SENSE MEASUREMENT UNIT WITH MINIMIZED COMMON MODE ERRORSABSTRACT A particular configuration of voltage seuree sense measurement (VSM) circuitry minimizes common mode errors in measurement of current through a device under test(DUT), even across a wide range of output voltages. The current IDUT is not affected by common-mode errors, since the current measurement is based on the output voltage of an operational amplifier or a differential amplifier, and the circuit configuration is such that the current measurement is made while the operation amplifier or differential amplifier has very low common-mode input voltage.Fig. 1