Title :
40MHz Gm-C filter with high linearity OTA for wireless applications
Author :
Hsu, Shin-Jye ; Lu, Che-Yu ; Hung, Chung-Chih
Author_Institution :
Dept. of Electr. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
This paper presents a fourth-order linear phase low-pass filter for high speed wireless system. A high linearity operational transconductance amplifier (OTA) is proposed, where the characteristics of input attenuators and low source impedance are used to achieve high linearity. By using the proposed OTA as a building block, the fourth-order low-pass filter with the cutoff frequency of 40MHz is implemented. The filter is designed in 0.18-μm CMOS process technology and the HD3 performance is about -53.4dB. The filter works with 1.8V supply voltage and its power consumption is about 14.1mW.
Keywords :
CMOS analogue integrated circuits; attenuators; linear phase filters; low-pass filters; operational amplifiers; power consumption; CMOS process technology; Gm-C filter; HD3 performance; building block; cutoff frequency; fourth-order linear phase low-pass filter; fourth-order low-pass filter; frequency 40 MHz; high linearity OTA; high linearity operational transconductance amplifier; high speed wireless system; input attenuators; low source impedance; power 14.1 mW; power consumption; size 0.18 mum; supply voltage; voltage 1.8 V; wireless applications; Attenuators; Linearity; Low pass filters; Maximum likelihood detection; Nonlinear filters; Power harmonic filters; Transconductance;
Conference_Titel :
VLSI Design, Automation, and Test (VLSI-DAT), 2012 International Symposium on
Conference_Location :
Hsinchu
Print_ISBN :
978-1-4577-2080-2
DOI :
10.1109/VLSI-DAT.2012.6212607
