Floating integrator technique for switched-capacitor circuits employing reset cycles

A simple `floating¿ integrator technique is presented that is applicable to both single-ended and differential switched-capacitor circuits which employ reset cycles. This method is useful in eliminating the effects of any input offset or interstage differential or common-mode offsets in DC-coupled circuits. A monolithic circuit is demonstrated which uses this technique to achieve accurate differential integration of low-level signals in the presence of substantial differential and common-mode input offsets.