NDLI: Narrow band noise suppression scheme for improving signal to noise ratio

Content Provider	IEEE Xplore Digital Library
Author	Nag, A. Radhakrishna Rao, K.
Copyright Year	2003
Description	Author affiliation: Dept. of Electr. Eng., Indian Inst. of Technol. Madras, Chennai, India (Nag, A.; Radhakrishna Rao, K.)
Abstract	In mixed signal systems, a weak signal is buried in strong interferers. The signal to noise ratio is poor. To convert the signal to digital, the dynamic range of the analog to digital converter cannot be efficiently utilized. The interference has to be reduced before the conversion. A notch filter can remove this interference. To allow for the uncertainty of the interference frequency, process variations, and ageing of components, it has to be self-correcting. This paper presents a scheme that improves the signal to noise ratio. This system will form the front end of any mixed mode system where the signal is known to be buried in narrow-band noise. The self-tuned notch filter has two parts: a tunable notch filter (a transconductor implementation of the universal active filter) and a control circuit. This has been implemented in 0.35 /spl mu/m CMOS technology.
Sponsorship	VLSI Soc. India (VSI) Minstr. Commun. & Inf. Technol., Govern. India IEEE Circuits & Syst. Soc. ACM SIGDA NASSCOM
Starting Page	25
Ending Page	29
File Size	355841
Page Count	5
File Format	PDF
ISBN	0769518680
ISSN	10639667
DOI	10.1109/ICVD.2003.1183110
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-01-04
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Signal to noise ratio Narrowband Active filters Interference CMOS technology Dynamic range Analog-digital conversion Uncertainty Frequency Aging
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Hardware and Architecture

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