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Dynamic-range analysis and maximization of micropower G[subscript m]-C bandpass filters by adaptive biasing
- Source :
- IEEE
- Publication Year :
- 2010
-
Abstract
- 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.
Details
- Database :
- OAIster
- Journal :
- IEEE
- Notes :
- application/pdf, en_US
- Publication Type :
- Electronic Resource
- Accession number :
- edsoai.ocn656415582
- Document Type :
- Electronic Resource