Design and integrated circuit implementation for a programmable gm-C filter set for hearing aid applications
This thesis pertains to the design and integrated circuit (IC) implementation of an analogue signal processor: a CMOS analogue programmable transconductance-C (gm-C) filter set for micropower low-voltage and small IC area applications. The specific application here is a digitally programmable analog...
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sg-ntu-dr.10356-196402023-07-04T15:26:24Z Design and integrated circuit implementation for a programmable gm-C filter set for hearing aid applications Luo, Lijun. Chang, Joseph Sylvester School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering::Integrated circuits This thesis pertains to the design and integrated circuit (IC) implementation of an analogue signal processor: a CMOS analogue programmable transconductance-C (gm-C) filter set for micropower low-voltage and small IC area applications. The specific application here is a digitally programmable analogue hearing aid where micropower dissipation, low voltage and compactness (in terms of IC area) are critical parameters. Current-art programmable filter sets in digitally programmable hearing aids employ sampled-data Switched-Capacitor (SC) filter technology. We propose a continuous-time gm-C alternative for two reasons. First, the different clocks of the SC filters and Class D amplifiers in current-art hearing aids often result in unacceptable 'beating' noise. Second, gm-C filters, being continuous-time, does not require anti-aliasing or reconstruction filters, and does not suffer from foldback noise aliased into the base band. Master of Engineering 2009-12-14T06:19:23Z 2009-12-14T06:19:23Z 1996 1996 Thesis http://hdl.handle.net/10356/19640 en NANYANG TECHNOLOGICAL UNIVERSITY 126 p. application/pdf |
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DRNTU::Engineering::Electrical and electronic engineering::Integrated circuits Luo, Lijun. Design and integrated circuit implementation for a programmable gm-C filter set for hearing aid applications |
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This thesis pertains to the design and integrated circuit (IC) implementation of an analogue signal processor: a CMOS analogue programmable transconductance-C (gm-C) filter set for micropower low-voltage and small IC area applications. The specific application here is a digitally programmable analogue hearing aid where micropower dissipation, low voltage and compactness (in terms of IC area) are critical parameters. Current-art programmable filter sets in digitally programmable hearing aids employ sampled-data Switched-Capacitor (SC) filter technology. We propose a continuous-time gm-C alternative for two reasons. First, the different clocks of the SC filters and Class D amplifiers in current-art hearing aids often result in unacceptable 'beating' noise. Second, gm-C filters, being continuous-time, does not require anti-aliasing or reconstruction filters, and does not suffer from foldback noise aliased into the base band. |
author2 |
Chang, Joseph Sylvester |
author_facet |
Chang, Joseph Sylvester Luo, Lijun. |
format |
Theses and Dissertations |
author |
Luo, Lijun. |
author_sort |
Luo, Lijun. |
title |
Design and integrated circuit implementation for a programmable gm-C filter set for hearing aid applications |
title_short |
Design and integrated circuit implementation for a programmable gm-C filter set for hearing aid applications |
title_full |
Design and integrated circuit implementation for a programmable gm-C filter set for hearing aid applications |
title_fullStr |
Design and integrated circuit implementation for a programmable gm-C filter set for hearing aid applications |
title_full_unstemmed |
Design and integrated circuit implementation for a programmable gm-C filter set for hearing aid applications |
title_sort |
design and integrated circuit implementation for a programmable gm-c filter set for hearing aid applications |
publishDate |
2009 |
url |
http://hdl.handle.net/10356/19640 |
_version_ |
1772827073948155904 |