半导体学报2011，Vol.32Issue(3)：94-99,6.DOI:10.1088/1674-4926/32/3/035003
A 2.5-V 56-mW baseband chain in a multistandard TV tuner for mobile and multimedia applications
A 2.5-V 56-mW baseband chain in a multistandard TV tuner for mobile and multimedia applications
摘要
Abstract
This paper presents post-layout simulated results of an analog baseband chain for mobile and multimedia applications in a 0.13-μm SiGe BiCMOS process.A programmable 7th-order Chebyshev low pass filter with a calibration circuit is used in the analog baseband chain,and the programmable bandwidth is 1.8/2.5/3/3.5/4MHz with an attenuation of 26/62 dB at offsets of 1.25/4 MHz.The baseband programmable gain amplifier can achieve a linear 40-dB gain range with 0.5-dB steps.Design trade-offs are carefully considered in designing the baseband circuit,and an automatic calibration circuit is used to achieve the bandwidth accuracy of 2%.A DC offset cancellation loop is also introduced to remove the offset from the layout and self-mixing,and the remaining offset voltage is only 1.87 mV.Implemented in a 0.13-μm SiGe technology with a 0.6-mm2 die size,this baseband achieves IIP3 of 23.16 dBm and dissipates 22.4 mA under a 2.5-V supply.关键词
multimedia/ baseband/ low pass filter/ leapfrog/ programmable gain amplifier/ frequency calibration/DC negative feedback loopKey words
multimedia/ baseband/ low pass filter/ leapfrog/ programmable gain amplifier/ frequency calibration/DC negative feedback loop引用本文复制引用
Yang Zhou,Wen Guangjun,Feng Xiao..A 2.5-V 56-mW baseband chain in a multistandard TV tuner for mobile and multimedia applications[J].半导体学报,2011,32(3):94-99,6.基金项目
Project supported by the Provincial and Ministerial Industry-Academia Cooperation Project of China (No.2009A090100019). （No.2009A090100019）
