Patent ID: 7095280

Claim:
An instrumentation amplifier for use in a measurement device, the instrumentation amplifier comprising: a negative input terminal; an output terminal; a first op-amp comprising a noninverting input terminal, an inverting input terminal, and an output terminal, wherein one of the input terminals of the first op-amp is coupled to the negative input terminal of the instrumentation amplifier; a current-to-voltage (I-V) converter comprising a first input terminal, a second input terminal, and an output terminal, wherein the output terminal of the I-V converter is coupled to the output terminal of the instrumentation amplifier; a first dielectric absorption (DA) compensation circuit coupled to the output terminal of the first op-amp, wherein the first DA compensation circuit is operable to generate a first DA compensation signal which is derived from an input step signal received at the negative input terminal of the instrumentation amplifier; and a second DA compensation circuit coupled to one of the input terminals of the I-V converter, wherein the second DA compensation circuit is operable to generate a second DA compensation signal and provide the second DA compensation signal to the I-V converter; wherein the first and second DA compensation signals are operable to reduce dielectric absorption and improve a step response of the instrumentation amplifier.