一种71dB动态范围的低功耗可编程增益放大器  

A 71dB Gain Range Low Power Programmable Gain Amplifier

作　　者：柳雪晶[1] 陈洋[1] 林平分[1] 

机构地区：[1]北京工业大学北京市嵌入式系统重点实验室,北京100124

出　　处：《中国集成电路》2013年第5期62-65,共4页China lntegrated Circuit

摘　　要：本文实现了一款应用于电力线通信的可编程增益放大器(PGA)。采用闭环直接耦合方式,动态范围为71dB,调节精度为1dB。为了优化功耗和面积,本文提出了一种新的电阻阵列。该设计在SMIC0.18μm工艺下仿真,结果表明:在35dB增益下输入参考噪声为20nV/姨Hz;输出电压峰峰值为1V时,THD达到-68dB;最大增益误差为0.11dB;在1.8V的供电电压下,功耗为1mA。A programmable gain amplifier （ PGA ） for power line communication is presented in this paper. It implements 71dB dynamic range and ldB accuracy using closed-loop direct coupling structure. In order to optimize power consumption and area, this paper presents a new resistor arrays. The proposed PGA circuit is designed in SMIC 0.18 μm process and simulation results show that the PGA has 20nV/√Hz input refer noise at 35 dB. The THD is -68dB at 1V output peak-to-peak voltage. The Maximum gain error is 0.1 ldB. The power consumption is lmA at 1.8V power supply voltage.

关 键 词：可编程增益放大器 闭环 电阻阵列 电阻共享. 

分 类 号：TN722[电子电信—电路与系统]