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
DownloadArfin-2009-Dynamic-range analysis and maximization of micropower Gm-C bandpass filters by adaptive biasing.pdf (939.6Kb)
Dynamic-range analysis and maximization of micropower Gm-C bandpass filters by adaptive biasing
MetadataShow full item record
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.
DepartmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
IEEE International Symposium on Circuits and Systems, 2009. ISCAS 2009
Institute of Electrical and Electronics Engineers
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.
Final published version
INSPEC Accession Number: 10760695