Zero common-mode gain fully balanced circuit structure

摘要

This paper proposes a fully balanced circuit structure with a zerocommon-mode gain. The common-mode gain of the proposed structurebecomes theoretically zero with a perfect device matching. Even if aperfect device matching is not achieved, the common-mode signal canbe sufficiently suppressed by the feedback loops provided with thestructure. Based on this concept, an integrator is composed.Furthermore the concept can be directly applied to a filter design.