Dynamic-range analysis and maximization of micropower G[subscript m]-C bandpass filters by adaptive biasing
Author(s)
Arfin, Scott Kenneth; Mandal, Soumyajit; Sarpeshkar, Rahul
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Alternative title
Dynamic-range analysis and maximization of micropower Gm-C bandpass filters by adaptive biasing
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Show full item recordAbstract
We analyze and present an input gain-varying scheme for maximizing dynamic range in a well-known G[subscript m]-C bandpass filter by both minimizing noise for small input signals, and by achieving balanced swing levels at all filter nodes for large input signals. A micropower bandpass filter suitable for use in cochlear implants and other power-constrained biomedical applications was implemented and tested in subthreshold CMOS. At a center frequency of 1.4 kHz and quality factor of 4, the filter has 70 dB of dynamic range (57 dB maximum SNR, 2.5% total harmonic distortion (THD)) and consumes 2.55 muW of power.
Date issued
2009-06Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer ScienceJournal
IEEE International Symposium on Circuits and Systems, 2009. ISCAS 2009
Publisher
Institute of Electrical and Electronics Engineers
Citation
Arfin, S.K., S. Mandal, and R. Sarpeshkar. “Dynamic-range analysis and maximization of micropower G[subscript m]-C bandpass filters by adaptive biasing.” Circuits and Systems, 2009. ISCAS 2009. IEEE International Symposium on. 2009. 2954-2957. ©2009 Institute of Electrical and Electronics Engineers.
Version: Final published version
Other identifiers
INSPEC Accession Number: 10760695
ISBN
978-1-4244-3828-0