Development of an Automatic Calibration Circuit for a Particle Detection System Used in Deep Space

An automatic calibration circuit based on field programmable gate array (FPGA) is developed for automatic calibration of deep space particle detection system. The circuit is mainly composed of a standard pulse generator unit, a high-speed Analog-to-Digital converter unit and a control and data processing unit. The control and data processing unit complete the control of peripheral circuits and online data processing, which is implemented based on FPGA.It provides a tool for in-flight calibration and automatic test of the deep space probe system and is verified through various experiments,which shows that the designed circuit can automatically calibrate the system important features of baseline stability, linearity and energy resolution and has the characteristics of high automation,high reliability,high flexibility and high integration.