Title : ( A Highly-Linear Transconductor for Gm-C Tracking Filters Employed in Digital TV Tuners )
Authors: Mehdi Saberi , Mohammad Hosnan , hossein sobhanifar , Reza Lotfi ,
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Abstract
In this paper, a highly-linear CMOS transconductor for use in tracking low-pass Gm-C filters employed III digital TV tuners IS proposed. In order to improve the linearity of the proposed transconductor at the wide VHF/UHF frequency bands, a new linearization technique based on parallel operation of auxiliary transconductors in triode and subthreshold regions is proposed. Based on the proposed transconductor, a third-order elliptic low-pass Gm-C filter is designed and simulated in a standard 0.18-um CMOS technology. The cutoff frequency of the filter is tunable from 50MHz to 300 MHz. Simulation results show that the designed filter provides a maximum in-band output referred third-order intercept point of 21.5 dBm while drawing an average current of 106 mA from a supply voltage of 1.8 V.
Keywords
, Tracking low pass filter; Gm-C filter, linearity improvement.
@inproceedings{paperid:1064254,
author = {Saberi, Mehdi and Hosnan, Mohammad and Sobhanifar, Hossein and Lotfi, Reza},
title = {A Highly-Linear Transconductor for Gm-C Tracking Filters Employed in Digital TV Tuners},
booktitle = {Iranian Conference on Electrical Engineering (ICEE)},
year = {2017},
location = {تهران, IRAN},
keywords = {Tracking low pass filter; Gm-C filter; linearity improvement.},
}
%0 Conference Proceedings
%T A Highly-Linear Transconductor for Gm-C Tracking Filters Employed in Digital TV Tuners
%A Saberi, Mehdi
%A Hosnan, Mohammad
%A Sobhanifar, Hossein
%A Lotfi, Reza
%J Iranian Conference on Electrical Engineering (ICEE)
%D 2017
