基于高速电流舵数/模转换器动态性能的电流开关驱动器

基于电流开关驱动器对高速电流舵D／A转换器动态性能的影响因素分析，提出了结合驱动信号交叉点理论、同步锁存技术和低驱动信号摆幅的电流开关驱动器设计技术，并设计了新型的电流开关驱动器电路．基于TSMC 0．35μm CMOS工艺采用Hspice仿真工具，对电流开关驱动器进行仿真分析和应用验证．基于电流开关驱动器所实现的4位D／A转换器具有很低的输出伪信号，所实现的8位D／A转换器具有很高的无杂波动态范围，表明这种电流开关驱动器能保证高速D／A转换器的良好动态性能．

Current switch drivers based on high-speed current-steering digital-to-analog convertor dynamic performance

Based on the analysis of teh influence of the current switc driver on dynamic performance of the high-speed current-steering D/A converter, the design principle of the current switch driver is proposed. The crossing point theory, synchronous flip-latch and limited swing driver are included in the principle, and a novel current switch driver circuit is proposed in TSMC 0.35μm CMOS technology. The driver circuit is simulated and analyzed by Hspice. The 4-bit D/A converter introduced novel driver has low glitch energy, and the 8-bit segmented D/A converter introduced novel driver has high SFDR. The simulated results show that the principle and the driver are very useful to the high speed D/A converter design with good dynamic performance.