【摘要】 提出了一种符合USB高速模式的偏置产生方法,针对常规偏置设计方法特点,将偏置电路融合于接口电路本身.介绍了USB高速串行接口电路架构,分析了其中偏置电路的产生机理、设计方法,最后,给出了偏置电路的完整实现.电路前后仿真基于Cadence的spectre仿真软件,电路设计和流片基于TSMC的CMOS 0.25 um混合信号模型.前后仿真实验和流片测试结果表明:基于所设计的偏置,USB高速模式下的发送器、接收器均可正确工作;能隙基准部分在输入电压为2.5 V,在-50~70℃范围内,输出电压稳定在1.233 7~1.235 6 V,输出电压变化率为0.154%.更多还原

【Abstract】 This paper proposed a new bias-generator for high-speed serial data link based upon USB 2.0.The paper started with top architecture of high-speed serial data link,which is followed by design idea in bias topology.Lastly,the paper bring forward overall implement of the bias. The circuit simulation is based on Cadence’s spectre software and Taiwan Semiconductor Manufacture Corporation’s library of 0.25um mixed-signal complementary metal-oxide semiconductor model.The front and post-simulation,test results revealed that,based on the bias circuit designed,transmitter and receiver in high-speed serial link can both work properly with high-speed data in 480 Mbps,which is in agreement with USB 2.0 specification.更多还原