Title :
A 4–40MHz Active-RC chebyshev LPF with digital-assisted calibration for direct-conversion DVB-S/S2 & ABS-S TV tuners
Author :
Song-Ting Li ; Jian-Cheng Li ; Xiao-Chen Gu ; Hong-Yi Wang ; Zhao-wen Zhuang
Author_Institution :
Sch. of Electron. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China
fDate :
Oct. 29 2012-Nov. 1 2012
Abstract :
A 4-40MHz fifth-order gain-adjustable LPF utilizing digital-assisted calibration for direct-conversion DVB-S/S2 & ABS-S TV tuners has been implemented in 0.13μm CMOS technology. The bandwidth of the filter can be changed from 4-16MHz with 0.5MHz step and 17-40MHz with 1MHz. The calibration includes automatic DC-offset Calibration (DCOC) and Automatic Frequency Tuning (AFT) to achieve less than 3mV residual output offset and 6% cut-off frequency deviation. The filter has -6-12dB gain range with 6dB step, less than 33.5nV/Hz1/2 input-referred noise, 30dBm IIP3, 59dBm IIP2, and draws 10.7mA from 2.8V supply.
Keywords :
CMOS integrated circuits; Chebyshev filters; RC circuits; active filters; calibration; circuit noise; circuit tuning; digital video broadcasting; low-pass filters; ABS-S TV tuner; AFT; CMOS technology; DCOC; IIP2; IIP3; active-RC Chebyshev LPF; automatic DC-offset calibration; automatic frequency tuning; current 10.7 mA; cut-off frequency deviation; digital-assisted calibration; direct-conversion DVB-S/S2; fifth-order gain-adjustable LPF; filter bandwidth; frequency 4 MHz to 40 MHz; gain -6 dB to 12 dB; input-referred noise; residual output offset; size 0.13 mum; voltage 2.8 V; Bandwidth; Calibration; Capacitance; Cutoff frequency; FCC; Noise; Resistance;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2012 IEEE 11th International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4673-2474-8
DOI :
10.1109/ICSICT.2012.6467935
