Patent ID: 7791034

Claim:
An imaging apparatus, comprising: a plurality of pixels arranged in row and column directions and each having a conversion element for converting radiation or light into an electrical signal and a switch element, wherein said plurality of pixels are classified into a plurality of groups including first and second groups; a plurality of signal wirings connected to said plurality of switch elements in the column direction; and a read-out circuit connected to said plurality of signal wirings, wherein said read out circuit comprises a first reset switch corresponding to the signal wiring connected to the switch element of the pixel included in said first group, and a second reset switch corresponding to the signal wiring connected to the switch element of the pixel included in said second group, wherein said first and second reset switches are turned on and off in a period between one period in which electric signals of conversion elements in one row are transferred and another period in which electric signals of conversion elements in another row are transferred, and said first reset switch is turned on or off with timing different from that of said second reset switch.