Title :
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
Abstract :
A continuous-time 5th 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 5th 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);
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
