Title :
Noise and Group Delay in Active Filters
Author :
Groenewold, Gerrit
Author_Institution :
Qualcomm, San Diego
fDate :
7/1/2007 12:00:00 AM
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;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2007.900181
