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A 0.6 V, 2.11 MHz, 62 dB SFDR active‐RC filter in 0.13µm CMOS process
Author(s) -
Seok JiHwan,
Jo JunGi,
Yoo Changsik
Publication year - 2010
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.526
Subject(s) - digital biquad filter , spurious free dynamic range , cmos , operational amplifier , decimation , electrical engineering , electronic engineering , amplifier , transfer function , voltage , dynamic range , active filter , filter (signal processing) , computer science , engineering
Active‐RC biquad is proposed, which allows the DC level of the input of operational amplifier (op‐amp) to be different from that of the op‐amp output, enabling the low‐voltage operation. The proposed biquad realizes a second‐order transfer function with only one op‐amp, rendering even lower power consumption. By cascading two biquads, a 0.6 V fourth‐order filter is realized in a 0.13µm CMOS technology. While dissipating only 0.42 mW, the filter shows 2.11 MHz cut‐off frequency and 62 dB spurious‐free dynamic range. Copyright © 2008 John Wiley & Sons, Ltd.