DocumentCode
2637437
Title
A 5th-order Chebyshev active RC complex filter with automatic frequency tuning for wireless sensor networks application
Author
Chen, Gang ; Li, Zhiqun ; Su, HaiYong ; Zhang, Li ; Li, Wei
Author_Institution
Inst. of RF- & OE-ICs, Southeast Univ., Nanjing, China
Volume
1
fYear
2010
fDate
17-20 Sept. 2010
Firstpage
1
Lastpage
4
Abstract
A 5th-order Chebyshev active RC complex filter for wireless sensor networks with automatic frequency tuning is presented in this paper. This filter is synthesized from 5th-order low-pass LC prototype, and designed using leapfrog structure. An automatic frequency tuning is used to prevent the deviation of the RC constant of the filter. This filter is fabricated in TSMC 0.18μm CMOS process. The measurement results show that the passband gain of the filter is about 16dB and the ripple in the passband is about 1.5dB. It is centered at 2MHz with 2.45MHz of bandwidth after tuning. The image rejection ratio (IRR) is about 40dB and the adjacent channel rejuction (ACR) around 6MHz is about 55dB. The precision of the tuning system could be controlled to less than 3%. The filter consumes about 6.5mA totally with 1.8V power supply.
Keywords
CMOS integrated circuits; RC circuits; active filters; wireless sensor networks; 5th-order Chebyshev active RC complex filter; 5th-order low-pass LC prototype; TSMC 0.18μm CMOS process; adjacent channel rejuction; automatic frequency tuning; bandwidth 2 MHz; bandwidth 2.45 MHz; bandwidth 6 MHz; current 6.5 mA; gain 1.5 dB; gain 16 dB; gain 40 dB; gain 55 dB; image rejection ratio; leapfrog structure; voltage 1.8 V; wireless sensor networks; Active filters; Arrays; Capacitors; Resistance; Resistors; Switches; Tuning;
fLanguage
English
Publisher
ieee
Conference_Titel
Signals Systems and Electronics (ISSSE), 2010 International Symposium on
Conference_Location
Nanjing
Print_ISBN
978-1-4244-6352-7
Type
conf
DOI
10.1109/ISSSE.2010.5607135
Filename
5607135
Link To Document