Title :
A 5th order gm-C low-pass filter with ±3% cut-off frequency accuracy and 220MHz to 3.3GHz tuning-range in 28nm LP CMOS
Author :
Sabatino, N. ; Minoia, Gabriele ; Roche, M. ; Baldi, Daniele ; Temporiti, Enrico ; Mazzanti, Andrea
Author_Institution :
Dipt. di Ing. Ind. e dell´Inf., Univ. di Pavia, Pavia, Italy
Abstract :
A 5th order gm-C filter complete with calibration circuits with wide tuning range and cut-off frequency up to the GHz range is presented. To simplify calibrations, integrators are designed to have a relatively low static gain of 32dB, regulated with negative resistors. Transconductance and gain are continuously controlled with a master-slave approach leading to a remarkably stable filter shape and cut-off frequency accuracy within ±3% over a 0°-100° temperature range and ±5% supply variation. A test-chip has been realized in a 28nm Low Power CMOS technology. The cut-off frequency is tunable from 220MHz to 3.3GHz with power dissipation scaling from 5mW to 30mW. THD is -40dB at -24dBV input signal while the integrated input equivalent noise is lower than 400μVrms, corresponding to an SNR better than 39dB.
Keywords :
CMOS integrated circuits; UHF filters; UHF integrated circuits; VHF filters; calibration; field effect MMIC; integrated circuit design; low-pass filters; low-power electronics; microwave filters; power aware computing; 5th order gm-C low-pass filter; LP CMOS technology; SNR; THD; calibration circuits; cut-off frequency accuracy; frequency 220 MHz to 3.3 GHz; gain control; integrator design; low power CMOS technology; master-slave approach; negative resistors; power 5 mW to 30 mW; power dissipation scaling; size 28 nm; transconductance;
Conference_Titel :
European Solid State Circuits Conference (ESSCIRC), ESSCIRC 2014 - 40th
Conference_Location :
Venice Lido
Print_ISBN :
978-1-4799-5694-4
DOI :
10.1109/ESSCIRC.2014.6942094
