张建亮,殷树娟,王小妮

• 1:北京信息科技大学理学院

摘要(Abstract)：

针对便携式电子设备在微弱信号检测中对高增益、低功耗电路的需求，基于SMIC 180 nm BCD混合信号工艺，设计了一款高增益低功耗锁相放大器电路。采用二阶全通滤波器设计移相电路，实现0°～360°全相位连续可调，突破了传统移相范围的限制；采用减法电路+并联耦合对结构，构建四象限模拟乘法器，有效降低了电路功耗；采用有源低通滤波器替代无源电阻电容（resistor-capacitor, RC）滤波器以提升增益。仿真结果表明，该电路在1.8 V电源供电下，增益达109 dB，功耗为659.7μW，全相位锁相放大性能稳定，相较于同类设计，其在增益与功耗控制方面优势显著，可有效满足便携式设备对微弱信号高精度检测的需求。

关键词(KeyWords)： 锁相放大器;低功耗;低通滤波器;模拟乘法器;BCD工艺

Abstract:

Keywords:

基金项目(Foundation): 北京市科技计划项目（Z231100006623012）

作者(Author): 张建亮,殷树娟,王小妮

DOI: 10.16508/j.cnki.11-5866/n.2025.06.012

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