Patent ID: 6931331

Claim:
An apparatus capable of making optimal differential and single-ended measurement interfaces, comprising: a first summation element operable to receive a first input to be measured and a first final offset voltage input, wherein a first summation element output is the algebraic sum of the first input and the first final offset voltage input; a second summation element operable to receive a second input to be measured and a second final offset voltage input, wherein a second summation element output is the algebraic sum of the second input and the second final offset voltage input; a first switch operable to receive a first offset voltage and to enable and disable the first final offset voltage; a second switch operable to receive a second offset voltage and to enable and disable the second final offset; a differential amplifier operable to receive first and second summation element outputs as differential inputs, having a differential amplifier output which is determined by the difference between the differential inputs; a third summation element operable to receive the differential amplifier output signal and a third final offset voltage as inputs, and produce a third summation element output which is the algebraic sum of the differential amplifier output signal and the third final offset voltage; and a third switch operable to receive a third offset voltage and to enable and disable the third final offset voltage.