Device and method for determining at least two reference value-related pixel signal values of one or more LOFIC pixels by correlated double sampling

摘要

Circuit arrangement (14) for a device (10) for determining at least two reference value-related pixel signal values of at least one LOFIC pixel (12) by correlated double scanning to enable a higher dynamic range by adding the at least two reference value-related pixel signal values, with an average ( 42) for generating a separate reference value (R1), - an input unit (16) for reading out signal values of the pixel (12) and reference values, the input unit (16) having both an input (34) for the signal and reference values of the LOFIC Pixels (12) as well as an input (36) for the separately generated reference value (R1), - an output unit (18) for determining and outputting the reference value-related pixel signal values, a capacitive scanning device (22) as an interface between the input unit (16) and output unit (18) and a readout initialization device (24), the input unit (16) having both an input (3 4) for the signal and reference values (R2) of the pixel (12) as well as an input (36) for a separately generated reference value (R1), and is designed in such a way that a reference value-related pixel signal value from the signal sequence of the first reference value ( R1) - first signal value (S1) - second reference value (R2) - second signal value (S1) is determined, the first reference value (R1) being the separately generated reference value (R1) and the second reference value (R2) resulting after a reset Is the reference value (R2) of the pixel.