One-dimensional CMOS sensor noise immunity and single-chip used for the image of the target

摘要

Providing a linear array of sensors for imaging indicia encoded. The above sequence comprises analog front end incorporated in the single-chip CMOS back end of the digital (12) and (14). The analog front end (12) has a (16) photodiodes, photodiodes (16), each linear array converts into an electrical analog signal incident light. The analog front-end analog (12), - and a digital converter (ADC) (22), for converting analog signals into digital signals. On the other hand, the digital back end (14) is processed into a digital output signal having information that is relevant to symbol is imaged, and the digital signal. Also, in order to suppress the noise, correlated double sampling in real time (CDS) circuit is used.