Patent ID: 8354834
Filing Date: 2013-01-15
Classification: G01D,G01R

Abstract:
1. A measurement apparatus, comprising: a differential input stage having a signal input configured to receive a first component of a differential signal, a plurality of measurement range outputs, and a plurality of selectable gain stages, each of the selectable gain stages coupled between the signal input and a respective one of the measurement range outputs; an output stage having a measurement acquisition path between an analog measurement input and a digital measurement output, the measurement acquisition path including an analog-to-digital converter (ADC); and a multiplexer having i) a plurality of data inputs, at least two of which are coupled to respective ones of the plurality of measurement range outputs, and at least one of which is a reference input configured to receive a second component of the differential signal, to which signals appearing at the measurement range outputs are commonly referenced, ii) a data output coupled to the analog measurement input of the output stage, and iii) a control input.