应用于多模接收机的低功耗可编程增益放大器  

A Low Power Programmable Gain Amplifier for Multi-mode Receiver

作　　者：王玉吉[1] 张成[1] 闫娜[1] 闵昊[1] 

机构地区：[1]复旦大学专用集成电路与系统国家重点实验室,上海201203

出　　处：《固体电子学研究与进展》2011年第3期245-250,共6页Research & Progress of SSE

基　　金：国家高技术研究发展计划(863计划)资助项目(2009AA011605);国家重点实验室重点课题资助项目(09ZD001);核高基重大专项资助项目(2009ZX01031-003-002);国家自然科学基金资助项目(61076028)

摘　　要：对多模接收机的应用,提出了引入一条闭环伪通路技术结构的可编程增益放大器,在保持一定的线性度及噪声性能的基础上,以较低的功耗实现较大的带宽。该电路增益步长为2 dB,增益变化范围1～39 dB。电路中内嵌了直流失调消除模块防止直流漂移引起的阻塞。芯片采用SMIC 0.13μm 1P8M RFCMOS工艺实现。测试结果表明,在1.2 V电源电压、电压增益为30 dB情况下,芯片输出三阶交调点为27.5 dBm,在最大增益处的噪声系数为25 dB,核心电路功耗仅为2.8 mW。A close loop fake path structure is proposed in programmable gain amplifier for multi-mode receiver application to achieve a larger bandwidth and low power while maintaining a certain degree of linearity and noise performance. The PGA provides a gain range of 1-39 dB and gain step of 2 dB The DC offset is attenuated by using an embedded DC offset cancellation module to prevent baseband signal from deep damage. The PGA was fabricated in SMIC 0.13 μm 1P8M RF CMOS process. Experimental results show that its OIP3 is about 27.5 dBm at the voltage gain of 30 dB, the noise figure in the high gain is about 25 dB and the core circuit only consumes 2.8 mW under 1.2 V supply.

关 键 词：可编程增益放大器 直流失调消除 多模接收机 

分 类 号：TN432[电子电信—微电子学与固体电子学] TN721.1