1. Development of the Electronic Circuit in High Frequency SLR Based on FPGA Chong CHEN, Cunbo FAN, Zhenwei LI, You ZHAO

2. Abstract Increase of the laser firing frequency will significant improve the performance of Satellite Laser Ranging (SLR) system. To meet the requirement of high frequency SLR, an implementation of control circuit in single FPGA chip was designed and developed. SOPC (System On Programmable Chip) system was proposed to solve these problems. To realize the system, a control circuit custom component was designed and simulated. Then, the component was integrated into a SOPC system. Cooperated with software, the circuit has the ability to control the SLR system running at high frequency. Finally, the system was simulated in the Quartus software and NIOS IDE provided by Altera and implemented in an Altera EP1S10 development kit.

3. Hardware block diagram UART CORE 串口通信 NIOSII CPU Control Circuit Component SDRAM Controller FLASH Controller Avalon 总线 Host Computer 串口线 Fire signal, to laser RG signal, to SPAD SOPC system FPGA JTAG UART 系统调试 SDRAM FLASH 10MHz Clock, PPS signal

4. Read ephemeris Transmit Complete ？ Read Currant Second Read The Pulse Time Start Pulse ？ Send the RG time to custom component Calculate The RG Initialization N Y N Y Figure 2 Software in embed system