Stray-insensitive, leakage-independent image sensing with reduced sensitivity to device mismatch and parasitic routing capacitance

摘要

A single capacitor (C) can be used for both readout and noise reduction in an imaging sensor. This dual-purpose use of the single capacitor is facilitated by a switching arrangement (Φ1-Φ5) which connects the capacitor to a low impedance node (n7, n41) during charge storage. The low impedance node is also used to drive a column readout line (Vout).