DocumentCode
1051376
Title
Noise and Group Delay in Active Filters
Author
Groenewold, Gerrit
Author_Institution
Qualcomm, San Diego
Volume
54
Issue
7
fYear
2007
fDate
7/1/2007 12:00:00 AM
Firstpage
1471
Lastpage
1480
Abstract
The output noise spectrum and the group delay of active filters are related. For any state-space realization of any transfer function without finite transmission zeros, there is a combination of noise transfer functions that is equal to the group delay. For any transfer function without transmission zeros, it is possible to generate a filter for which the output noise spectrum is an exact multiple of the group delay. This relationship allows for quick noise estimates, and gives insight into the noise behavior of filters.
Keywords
active filters; circuit noise; poles and zeros; transfer functions; active filters; finite transmission zeros; group delay; noise behavior; noise transfer functions; output noise spectrum; state-space realization; Active filters; Active inductors; Active noise reduction; Band pass filters; Delay; Low pass filters; Noise generators; Passive filters; Signal design; Transfer functions; Active filters; group delay; noise behavior;
fLanguage
English
Journal_Title
Circuits and Systems I: Regular Papers, IEEE Transactions on
Publisher
ieee
ISSN
1549-8328
Type
jour
DOI
10.1109/TCSI.2007.900181
Filename
4268406
Link To Document