CAJ | 학술논문

介绍了一种星载相机电子倍增CCD（EMCCD）高压驱动电路的设计。该设计基于FPGA，采用直接数字频率合成技术实现正弦码数的发生，并能接收卫星指令信号进行在线调幅和调相；然后通过低压差分信号（LVDS）总线和高速大幅值运放技术，把正弦信号转化为EMCCD所需的高压倍增驱动信号。利用仿真与计算进行电路参数设定，并研制了实物样机。试验结果显示：电路生成的驱动信号相位调整步长为π／8，幅值调整精度优于0．01V。该设计可为国内后续EMC-CD卫星相机的研制提供参考。
개소료일충성재상궤전자배증CCD（EMCCD）고압구동전로적설계。해설계기우FPGA，채용직접수자빈솔합성기술실현정현마수적발생，병능접수위성지령신호진행재선조폭화조상；연후통과저압차분신호（LVDS）총선화고속대폭치운방기술，파정현신호전화위EMCCD소수적고압배증구동신호。이용방진여계산진행전로삼수설정，병연제료실물양궤。시험결과현시：전로생성적구동신호상위조정보장위π／8，폭치조정정도우우0．01V。해설계가위국내후속EMC-CD위성상궤적연제제공삼고。
A design of electron multiplying CCD（EMCCD） high-voltage driver circuit in satellite camera is introduced. Sinusoidal codes generator is implemented by a FPGA with direct digital frequency synthesis, which can receive telecommand signals to proceed amplitude and phase on- line adjustment. LVDS bus and large amplitude operational amplifier technique are utilized to convert sinusoidal signal to EMCCD high-voltage driving signal. Circuit parameters are settled by making calculations and simulations, then a physical prototype is developed. The results show that the phase modulation step of the driving signal is π/8, and the amplitude adjustment preci- sion is superior to 0.01V. This design can become an reference for the development of later EMC- CD satellite camera in China.