IMAGE SENSOR AND DIGITAL GAIN COMPENSATION METHOD THEREOF

摘要

The present invention relates to an image sensor and a method for compensating for a digital gain of thereof. The image sensor includes: a variable amplification means for amplifying an inputted analog image signal as a variable first gain value; an analog-to-digital conversion unit for converting the amplified analog image signal into a digital image signal; and a digital gain compensation means for comparing the first gain value with a reference gain value and compensating the digital image signal as a digital second gain value when the first gain value is less than the reference gain value.