Read-out circuitry for an image sensor

摘要

An array of image sensing elements is arranged in rows and columns. A readout circuit for each column includes a circuit configured to receive a column select signal. A memory stores data indicative of a voltage of an image sensing element which is being read. An analog to digital conversion circuit provides an output to the memory to control the storing of data. The output is dependent on the voltage of the image sensing element. Power control circuitry operates to disable, at least partially, the analog to digital conversion circuit when the column has not been selected.

主权项

1. A readout circuit for a column of an array of image sensing elements arranged in rows and columns, comprising:
a circuit configured to receive a column select signal; a memory configured to store data indicative of a voltage of an image sensing element which is being read; an analog to digital conversion circuit configured to provide an output to said memory to control the storing of said data, said output being dependent on said voltage of said image sensing element; and a power control circuit configured to disable, at least partially, said analog to digital conversion circuit in dependence upon said column select signal and a row style signal.