4.2非理想效应… …35 4.2.1非理想积分器模型…35 4.2.2非理想双二次结构的传递函数…37 4.3电路设计与改进 39 4.3.1增益误差的减小及有效品质因数的矫正… 39 4.3.2跨导放大器线性度模型及设计… 42 第五章频率校准与直流消除… …47 5.1滤波器参数稳定性… 47 5.2片上频率校准电路回顾… 48 5.2.1基于锁相环的校准 49 5.2.2基于开关电容技术的校准 50 5.2.3基于计数器和数字逻辑的校准… 50 5.3改进的频率校准方法… 51 5.3.1电路结构… 51 5.3.2误差分析 53 5.4直流失调消除 55 5.4.1接收机中的直流失调… 55 5.4.2直流失调消除电路… 56 第六章芯片实现及测试结果… 59 6.1电路实现… 59 6.2测试结果与对比 60 6.2.1线性度测试结果… 60 6.2.2频带选择测试结果… 61 6.2.3增益及带内纹波测试结果 62 6.2.4性能总结与对比 63 第七章总结与展望… …65 7.1总结… …65 7.2研究展望… 65 参考文献… …67 致谢… …71 0II 4.2 非理想效应 ··········································································35 4.2.1 非理想积分器模型 ··························································35 4.2.2 非理想双二次结构的传递函数 ···········································37 4.3 电路设计与改进 ····································································39 4.3.1 增益误差的减小及有效品质因数的矫正·······························39 4.3.2 跨导放大器线性度模型及设计 ···········································42 第五章 频率校准与直流消除······························································47 5.1 滤波器参数稳定性 ·································································47 5.2 片上频率校准电路回顾 ···························································48 5.2.1 基于锁相环的校准 ··························································49 5.2.2 基于开关电容技术的校准 ·················································50 5.2.3 基于计数器和数字逻辑的校准 ···········································50 5.3 改进的频率校准方法 ······························································51 5.3.1 电路结构 ······································································51 5.3.2 误差分析 ······································································53 5.4 直流失调消除 ·······································································55 5.4.1 接收机中的直流失调 ·······················································55 5.4.2 直流失调消除电路 ··························································56 第六章 芯片实现及测试结果······························································59 6.1 电路实现 ·············································································59 6.2 测试结果与对比 ····································································60 6.2.1 线性度测试结果 ·····························································60 6.2.2 频带选择测试结果 ··························································61 6.2.3 增益及带内纹波测试结果 ·················································62 6.2.4 性能总结与对比 ·····························································63 第七章 总结与展望··········································································65 7.1 总结 ···················································································65 7.2 研究展望 ·············································································65 参考文献···························································································67 致 谢 ·······························································································71