Design and Implementation of the Control Signal Clock Recovery Based on X-Ray Security Inspection Equipment
Cheng Tao · Modern Electronics Technique · 2010
A hardware solution of achieving serial data clock recovery by using phase locked loop is proposed,aiming at the existed problems of adopting traditional serial communication in the control signal transmission of X-ray security inspection system.The design is developed based on FPGA,the digital phase locked loop of serial control data transmission in the secu-rity inspection equipment(SIE) is researched,a serial clock recovery system for FPGA is designed,and the designs is realized by Verilog.The design is tested by the hardware system of SIE,and finally verified by the real-time data read from the Signal Tap II.The capture period of the clock recovery is short enough,and the capture precision also satisfy the system requirements,so the single line transmission of digital control signal in SIE system is realized,and the reliability of this system is effectively improved.