This paper describes a complete baseband chain for both GSM and WCDMA receivers with a SMIC 0.35μm mixed signal process.The chain consists of a dual-mode,highly linear,fourth order Chebyshev active RC filter and three VGA stages.The filter is designed to meet the bandwidth specifications of the GSM and WCDMA standards and share the maximum number of components between the two modes to reduce manufacturing cost.The design is free of DC-offset and has an inter-stage high-pass filter,and operational amplifiers...
【更新日期】
2007-03-29
【分类号】
TN713;TN722
【正文快照】
1Introduction A system that allows for both WCDMA inwideband systems and GSMin narrow-band sys-tems is the developing trend for mobile phones[1].However,a large increase in either the total manu-facturing cost or the power consumption is not ac-ceptable.T
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