论文部分内容阅读
面向人体介质通信领域,设计了一种基于0.18 μm CMOS工艺的接收模拟前端电路.采用有源电感零极点补偿技术,在保证电路噪声性能与增益的同时,有效拓展了电路线性带宽;通过在调整型共源共栅结构中引入高阻输入晶体管及负载管,使电路不仅具有良好的电流模信号放大能力,还具有电压模信号接收放大功能.芯片核心尺寸为379.3 μm× 118.9μm.后仿真结果表明,在电流输入模式下,电流等效输入噪声为8.36 pA/√Hz@50MHz,-3 dB带宽为0.26～114MHz,跨阻增益为70.3～112.5 dBΩ在电压输入模式下,电压等效输入噪声为4.43 nV/√Hz@50 MHz,-3 dB带宽为0.45～112MHz,电压增益为44～83.18 dB.对比人体通信接收机前端相关文献,该设计在带宽、噪声及兼容性方面具有应用优势.,A dual mode input wideband receiving analog front end circuit was designed in a 0.18 μm CMOS technology for the applications of human body communication (HBC).The zero-pole compensation technique of active inductor was used to expand effectively the circuit’ s linear bandwidth without affecting the noise and gain performance.By introducing a high resistance input transistors and load tubes into the regulated cascode (RGC) structure,the circuit’s current mode signal amplifying capability was improved,while the voltage mode signal receiving and amplifying functions were kept.The core area of the chip was 379.3μm× 118.9 μm.The post-layout simulation results showed that the current equivalent input noise was 8.36 pA/√Hz@50MHz,the-3 dB bandwidth was 0.26～114 MHz,and the transimpedance gain was 70.3 dBΩ to 112.5 dBΩ in current input mode.In voltage input mode,the voltage equivalent input noise was 4.43 nV/√Hz@50MHz,the-3 dB bandwidth was 0.45 ～ 112 MHz,and the voltage gain was 44 ～ 83.18 dB.Compared with the reports about human body communication receivers,this design had application advantages in terms of bandwidth,noise and compatibility.