A reconfigurable analog baseband for single-chip, Saw-less, 2G/3G/4G cellular transceivers with carrier aggregation
A-SSCC（2014）
摘要
This paper describes an analog baseband for single-chip 2G/3G/4G MIMO transceivers. By capacitor sharing technique and log tuning, the RX filter is programmable to set fc from 0.1 to 14MHz with 2% accuracy with 93dB gain range which is linear-in-dB. The TX filter suppresses DAC images and noise for Saw-less with constant or ramping envelope. A digital calibration adjusts fc, Q, and DC offset. The filter implemented in 65nm CMOS, occupies 2.79mm2, and consumes 7.3/8.4/10.2mW with 1.2V supply for 2G/3G/4G, respectively. This chip is in mass production for handheld products.
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关键词
3g mobile communication,4g mobile communication,cmos integrated circuits,q-factor,cellular radio,interference suppression,radio transceivers,2g transceivers,3g transceivers,4g transceivers,cmos,dac image suppression,dc offset,mimo transceivers,q offset,rx filter,capacitor sharing technique,carrier aggregation,cellular transceivers,constant envelope,digital calibration,frequency 0.1 mhz to 14 mhz,gain 93 db,handheld products,log tuning,mass production,noise suppression,power 10.2 mw,power 7.3 mw,power 8.4 mw,ramping envelope,reconfigurable analog baseband,saw-less,size 65 nm,voltage 1.2 v,cmos analog filter,logarithmic tuning resistor,tuning,capacitors,bandwidth,gain,baseband
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