Analog/RF IC设计实例详解

viphihi · 发表于昨天 22:27

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Analog/RF IC设计实例详解典型设计实例分析1. 温度补偿电压产生电路

这是一个使用BJT做输入对管的五管运放电路，一端接参考电位VREF。VREF通常由带隙基准电路生成，虽然实际存在一定的温漂，但通过电路设计可以实现温度补偿。这种电路在需要稳定参考电压的模拟系统中广泛应用，如数据转换器、电源管理芯片等‌1。

2. 放大器非线性设计

对于放大器或发射通道(TX)的非线性设计，除了使用1dB压缩点外，还常用三阶交调(IIP3、OIP3)等指标量化非线性特性。CIM3(Counter Intermodulation)也是非线性的一个重要量化指标，特别是在LTE、BT等发射系统中‌2。

3. 多通道RF到数据开发平台

Analog Devices推出的多通道RF到数据开发平台集成了RF采样高速转换器，在单芯片上包含ADC、DAC和数字信号算法模块。例如AD9081四通道16位、12 GSPS RF DAC和四通道12位、4 GSPS RF ADC，包含多个数字上/下变频器、数控振荡器(NCO)和有限脉冲响应(FIR)数字滤波器‌7。

开源项目与开发平台1. 16通道直接RF采样开发平台

这款16通道平台包含4个混合信号前端(MxFE)，每个MxFE包含4个DAC和4个ADC，共16个发射和接收通道。RF部分包含巴伦、放大器和滤波器，可以简化RF接口。这种平台特别适合相控阵雷达和5G基站等需要多通道同步采样的应用‌7。

2. Cadence Virtuoso设计平台

Virtuoso是Cadence公司推出的用于模拟/数字混合电路仿真和射频电路仿真的专业软件平台。它整合了射频提取技术、面向无线芯片设计的新流程，以及来自安捷伦、CoWare等合作伙伴的技术，大大增强了射频设计能力‌59。

设计流程与工具1. 典型射频收发系统设计

典型的射频收发系统包括低噪声放大器(LNA)、混频器(Mixer)、滤波器、可变增益放大器，以及提供本振所需的频率综合器等单元模块。设计流程通常包括：

系统行为建模和计算
模块指标分配
电路设计与仿真
版图设计与验证
后仿真和成品率控制‌5

2. WiFi产品射频电路设计

一般Wi-Fi产品的射频部分由五大部分组成：

射频前端模块
功率放大器部分
低噪声放大器
混频器
滤波器系统
这种模块化设计方法可以简化系统集成和调试过程‌6。

技术文档与学习资源1. 模拟集成电路设计课件

《模拟集成电路设计》课件涵盖了模拟集成电路的基本原理、电路设计的基本思想、关键工艺与设计方法。内容包括：

集成电路的基础概念和特性
电路设计的基本理论
信号传输与放大电路
线性集成电路和非线性集成电路的分析与设计方法
电路调试和测试技术等‌11

2. 射频电路设计经验总结

射频(RF)电路由无源元件、有源器件和无源网络组成。设计时需特别注意：

高频寄生效应
阻抗匹配
噪声控制
非线性特性
电磁兼容性等问题‌

1. CMOS工艺在RFIC中的应用

近年来，CMOS工艺在射频技术中的应用研究大量增多。深亚微米技术允许CMOS电路的工作频率超过1GHz，这使得集成CMOS射频电路成为可能。研究人员已利用标准CMOS工艺开发出高性能的下变频器、低相位噪声压控振荡器(VCO)和双模数预分频器等‌4。

2. 系统级创新解决方案

多通道RF到数据开发平台助力相控阵原型开发
拓扑选择、电路尺寸确定和布局生成技术的进步
来自太空的互联网：大容量、低延迟LEO卫星的RFIC进展
新材料与新工艺应用：如GaN、RF-SOI等
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onepound · 发表于 19 分钟前

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onepound · 发表于 18 分钟前

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