Patent ID: 8587827

Claim:
An integrated circuit comprising: analog front end circuitry configured to convert an analog signal to a digital signal, the analog signal being associated with an image captured by a sensor of an imaging device; illumination drive circuitry configured to drive an illumination source of the imaging device; and one or more transformation elements configured to operate on the digital signal to provide image correction of the image captured by the sensor of the imaging device, wherein (i) the analog front end circuitry, (ii) the illumination drive circuitry, and (iii) the one or more transformation elements are integrated on a single chip, and wherein the analog front end circuitry comprises a clamp digital to analog converter configured to provide a reference value, a reset level clamp configured to (i) receive the reference value from the clamp digital to analog converter, (ii) receive the analog signal from the sensor, and (ii) based on the reference value from the clamp digital to analog converter and the analog signal from the sensor, generate a first output signal, a correlated double sample circuit configured to (i) receive the first output signal from the reset level clamp, (ii) receive a reference voltage, and (iii) based on the first output signal from the reset level clamp and the reference voltage, generate a second output signal, and an analog to digital converter configured to, based on the second output signal, generate the digital signal.