Patent ID: 7049989

Claim:
An analog input front end, comprising: a configurable gain stage that is configured to receive an analog input signal and to provide a gain value to the analog input signal so as to output a gain-adjusted analog input signal that is within a particular voltage range between a maximum and a minimum value; and an analog-to-digital converter that is configured to receive the gain-adjusted analog input signal output from the configurable gain stage, and to perform analog-to-digital conversion on the gain-adjusted analog input signal, so as to output a digital signal that is indicative of the analog input signal, wherein the configurable gain stage comprises: a positive differential input signal stage including a first operational amplifier; and a negative differential input signal stage including a second operational amplifier, wherein the positive differential input signal stage further comprises: a first resistor and a first capacitor connected across the first operational amplifier and acting as a first frequency filter, and wherein the negative differential input signal stage further comprises: a second resistor and a second capacitor connected across the second operational amplifier and acting as a second frequency filter.