Sampling image signals generated by pixel circuits of an active pixel sensor (APS) image sensor in a sub-sampling mode

摘要

A method of sampling image signals generated by pixel circuits of an active pixel sensor (APS) image sensor. The APS image sensor supports a normal mode of operation and a sub-sampling mode of operation. The method includes providing a plurality of column amplifiers. A row of pixels circuits to sample is selected. Image signals from each pixel circuit in the selected row are routed to a different one of the plurality of column amplifiers when the APS image sensor is in the normal mode of operation. Image signals from a plurality of the pixel circuits in the selected row are routed to one of the plurality of column amplifiers when the APS image sensor is in the sub-sampling mode of operation.