基于VCO的超宽带数字调谐振荡器的设计  

Design of a VCO-based ultra-wideband digital-tuned oscillator

作　　者：田德民[1] 张学成[1] 韦炜[1] TIAN De-min;ZHANG Xue-cheng;WEI Wei(No. 723 Research Institute of CSIC, Yangzhou 225101, China)

机构地区：[1]中国船舶重工集团公司第七二三研究所,江苏扬州225101

出　　处：《雷达与对抗》2020年第4期64-68,共5页Radar & ECM

摘　　要：比较了3种频率合成技术的优缺点,提出了一种超宽带、高精度、高速的数字调谐振荡器实现方法。该方法采用多个VCO组合的方式,利用高速高精度DAC、高速运算放大器、可变增益放大器等,同时采用实时增益控制法对VCO的非线性进行补偿。基于本方法研制的数字调谐振荡器频率覆盖宽,集成度高,体积小,质量轻,具有全频段内调谐一致性高、置频时间短、频率精度高,以及杂散、谐波指标高等特点,可广泛适用于现代电子对抗、雷达仿真、电子战仿真等系统。The advantages and disadvantages of three different frequency synthesis technologies are compared,and an ultra-wideband,high accuracy and high-speed digital-tuned oscillator(DTO)is designed,in which multiple VCO combinations,high-speed high-accuracy DACs,high-speed operational amplifiers,and variable gain amplifiers are used and the nonlinear VCO is compensated through the real-time gain control method.The wideband,highly integrated,small and light DTO developed features high tuning consistency within full band,low frequency setting time,high frequency accuracy,and satisfactory spurious and harmonic specifications,widely applied in modern EW systems,radar simulation and EW simulation systems.

关 键 词：超宽带 数字调谐振荡器 直接数字合成器 锁相环 压控振荡器 

分 类 号：TN75[电子电信—电路与系统]