A low power automatic gain control loop for a receiver

This paper proposes a new structure to lower the power consumption of a variable gain amplifier（VGA） and keep the linearity of the VGA unchanged.The structure is used in a high rate amplitude-shift keying（ASK） based IF-stage.It includes an automatic gain control（AGC） loop and ASK demodulator.The AGC...

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Bibliographic Details
Published inJournal of semiconductors Vol. 31; no. 9; pp. 108 - 112
Main Author 李国锋 耿志卿 吴南健
Format Journal Article
LanguageChinese
English
Published IOP Publishing 01.09.2010
Subjects
CMOS技术
低功率
信号系统
功率消耗
可变增益放大器
接收器
控制环路
自动增益控制
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Summary:This paper proposes a new structure to lower the power consumption of a variable gain amplifier（VGA） and keep the linearity of the VGA unchanged.The structure is used in a high rate amplitude-shift keying（ASK） based IF-stage.It includes an automatic gain control（AGC） loop and ASK demodulator.The AGC mainly consists of sixstage VGAs.The IF-stage is realized in 0.18μm CMOS technology.The measurement results show that the power consumption of the whole system is very low.The system consumes 730μA while operating at 1.8 V.The minimum ASK signal the system could detect is 0.7 mV（peak to peak amplitude）.
Bibliography:amplitude-shift keying
TN792
linearity
automatic gain control loop
low power
variable gain amplifier
low power; linearity; variable gain amplifier; automatic gain control loop; amplitude-shift keying
11-5781/TN
TN850.3
ISSN:1674-4926
DOI:10.1088/1674-4926/31/9/095009