Patent ID: 8526078

Claim:
A sensor driving circuit comprising: an image sensor that converts light reflected from an original to be read into electric signals; a driver circuit that drives the image sensor; and a timing generator circuit configured to generate a timing signal that controls the image sensor, wherein the driver circuit is configured to include a first inverting output buffer circuit and a second inverting output buffer circuit that are equivalent to each other and connected in a double stage series, the timing generator circuit is configured to output a timing signal of which polarity is the same as polarity of an input signal inputted into the image sensor, supply voltage into the first inverting output buffer circuit is configured to be the same as supply voltage into the second inverting output buffer circuit, the supply voltage is configured to be enough to make the image sensor operate, and amplitude of an input signal that is inputted into the first inverting output buffer circuit and amplitude of an input signal that is inputted into the second inverting output buffer circuit are configured to be equalized.