Patent ID: 8059179

Claim:
A solid state image capturing apparatus, comprising: a pixel array section having unit pixels containing photoelectric conversion elements, the unit pixels being two-dimensionally arranged in a matrix, and column signal wires being arranged correspondingly to columns of the matrix of the unit pixels; a line scanning section configured to selectively control lines of the matrix of the unit pixels of the pixel array section; an analog-to-digital conversion section configured to convert an analog signal that is output from unit pixels of a line of the matrix of the unit pixels selected by the line scanning section through a corresponding column signal line to a digital signal; a conversion clock supply section configured to selectively generate a conversion clock having a first clock period or a conversion clock having a second clock period that is supplied to the analog-to-digital conversion section and supply a generated conversion clock to the analog-to-digital conversion section; and an addition section configured to add unit pixel digital signals converted in the analog-to-digital conversion section by the conversion clocks having the first clock period and the second clock period, respectively, and output an added pixel signal.