The design of multi-band reconfigurable CMOS Gm-C filter

Author

Zhiqiang, Gao ; Honglin, Xu ; Zhenzhen, Piao ; Zhongzhao, Zhang

Author_Institution

Dept. of Microelectron., Harbin Inst. of Technol., Harbin, China

fYear

2011

fDate

20-22 April 2011

Firstpage

1

Lastpage

4

Abstract

A continuous-time 5^th order low-pass reconfigurable, highly linear, Gm-C filter exhibiting a tuning wide bandwidth is presented. The filter uses a new high-frequency, linear operational transconductance amplifier. The operational transconductance amplifier is based on two cross-coupling pairs with active source degeneration resistance that allows high linear, high frequency filter performance. A 5^th order filter prototype has been fabricated in 0.18μm CMOS process and the active area occupies less than 0.2mm². Simulated results show the filter is tunable in frequency from about 150KHz to 23MHz, and it exhibits <; -40dB total harmonic distortion at 150KHz ~ 23MHz while the DC maximum power consumes 10.8mW.

Keywords

CMOS integrated circuits; low-pass filters; operational amplifiers; active source degeneration resistance; continuous-time 5th order low-pass reconfigurable filter; cross-coupling pairs; linear operational transconductance amplifier; multiband reconfigurable CMOS Gm-C filter; power 10.8 mW; size 0.18 mum; Band pass filters; Chebyshev approximation; Cutoff frequency; Low pass filters; Power harmonic filters; Transconductance; Tuning; CMOS process; Gm-C filter; operational transconductance amplifier (OTA);

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings (CJMW), 2011 China-Japan Joint

Conference_Location

Hangzhou

Print_ISBN

978-1-4577-0625-7

Electronic_ISBN

978-7-308-08555-7

Type

conf

Filename

5774017