Aiming at demand of spot location in the instrument design and experiment

linear array CCD driving and signal processing system are designed.Driving time sequence requirement of TCD1703C which is used as position sensor is analyzed

and the generation method and process of timing driver using CPLD are presented.In signal processing section.The working principle of high-performance analog front-end processing chip AD9845A and method using correlated double sampling for signal acquisition are introduced

the storage and transmission method of output signal is given.The system is validated by the slit width measurement and wavelength positioning.The results show that linear array CCD circuit system can meet the demand of spot location

the uncertainty of slit measurement is less than 1.0×10-2 and the precision of wavelength positioning is within 0.5 nm.