Title :
A reconfigurable analog baseband for single-chip, Saw-less, 2G/3G/4G cellular transceivers with carrier aggregation
Author :
Jongwoo Lee ; Byungki Han ; Jae-hyun Lim ; Su-seob Ahn ; Jae-kwon Kim ; Cho, Thomas
Author_Institution :
Samsung Electron., Hwasung, South Korea
Abstract :
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.
Keywords :
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; Bandwidth; Baseband; Capacitors; Gain; Passive filters; Power harmonic filters; Tuning; CMOS analog filter; logarithmic tuning resistor;
Conference_Titel :
Solid-State Circuits Conference (A-SSCC), 2014 IEEE Asian
Conference_Location :
KaoHsiung
Print_ISBN :
978-1-4799-4090-5
DOI :
10.1109/ASSCC.2014.7008847
