一种具有温度补偿的宽带CMOS可变增益放大器  

A Wideband CMOS Variable Gain Amplifier withTemperature Compensation

作　　者：黄杏丽[1] 秦希[1] 秦亚杰[1] 黄煜梅[1] 洪志良[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》2013年第3期254-259,共6页Research & Progress of SSE

基　　金：国家科技重大专项资助项目(2011ZX03004-002-02)

摘　　要：设计实现了一个具有温度补偿的宽带CMOS可变增益放大器,该可变增益放大器的核心电路由三级基于改进型Cherry-Hooper结构的可变增益单元级联而成,并通过一种温度系数增强的且可编程的偏置电路和增益控制电路对可变增益放大器的增益进行温度补偿。采用中芯国际0.13μm CMOS工艺流片,测试结果表明可变增益放大器的可变增益范围为-13～27dB,经过温度补偿后,在相同增益控制电压下其增益在0～75°C温度范围内的变化范围不超过3dB。可变增益放大器的3dB带宽为0.8～3GHz,输入1dB压缩点为-50～-21dBm,在1.2V电压下,功耗为21.6mW。A wideband CMOS variable gain amplifier with temperature compensation is presented.The VGA core consists of three cascading variable gain cells based on modified Cherry-Hooper structure.The gain of VGA is temperature-compensated by a bias circuit and a gain control circuit with enhanced and programmable temperature coefficient.Fabricated in SMIC 0.13 μm CMOS process,the measurement results show that the VGA provides a dynamic gain range of-13~27 dB and with temperature compensation,the variation range of its gain is less than 3 dB at the temperature range of 0~75°C under the same gain control voltage.The VGA has a 3 dB bandwidth of 0.8~3 GHz,and input P1 dB of-51~21 dBm while consuming 21.6 mW from a 1.2 V supply voltage.

关 键 词：宽带 互补金属氧化物半导体 可变增益放大器 温度补偿 

分 类 号：TN722[电子电信—电路与系统]