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

fYear

2012

fDate

Oct. 29 2012-Nov. 1 2012

Firstpage

1

Lastpage

3

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/Hz^1/2 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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICSICT.2012.6467935

Filename

6467935