Patent Document ID: 20080284507
Application ID: 11804492
Patent Flag: 0

Claim One:
1. An instrumentation amplifier comprising: an output stage for generating an output voltage; a low-frequency path coupled with said output stage, said low-frequency path comprising: a first input stage for sensing a differential input and generating a first intermediate current based thereon; a first feedback stage coupled with said first input stage and said output stage, said first feedback stage for generating a first feedback current based on said output voltage; and an auto-zeroing circuit coupled with said input stage, said feedback stage, and said output stage, said auto-zeroing circuit for generating a nulling current, wherein said nulling current compensates for errors in said first intermediate current and said first feedback current resulting from input offsets in said first input stage and said first feedback stage; and a high-frequency path coupled with said output stage, wherein said high-frequency path dominates said low-frequency path at frequencies above a particular frequency, and wherein further said low-frequency path dominates said high-frequency path at frequencies below said particular frequency.