Roll-off: Difference between revisions
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:''This article is about roll-off in electrical network analysis. For the dumpster, see [[roll-off (dumpster)]].'' |
:''This article is about roll-off in electrical network analysis. For the dumpster, see [[roll-off (dumpster)]].'' |
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'''Roll-off''' is a term commonly used in electrical network analysis, most especially in connection with filter circuits, to describe the steepness of a network's [[transmission function]] with [[frequency]] in the transition between a [[passband]] and a [[stopband]]. The function of frequency most usually being considered is the [[insertion loss]] of the network, but could in principle be any function of frequency related to the network. It is usual to measure roll-off as a function of [[logaritmic scale|logarithmic]] frequency, consequently, the units of roll-off are either [[decibel]]s per decade (dB/decade) or decibels per [[octave]] (dB/8ve). Decade being a x10 increase in frequency and octave being a x2 increase in frequency. Note that roll-off can occur with decreasing frequency as well as increasing frequency. |
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[[low-pass filter]] |
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Title Classical control using H [infinity] methods: an introduction to design |
Title Classical control using H [infinity] methods: an introduction to design |
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Revision as of 09:43, 4 July 2009
- This article is about roll-off in electrical network analysis. For the dumpster, see roll-off (dumpster).
Roll-off is a term commonly used in electrical network analysis, most especially in connection with filter circuits, to describe the steepness of a network's transmission function with frequency in the transition between a passband and a stopband. The function of frequency most usually being considered is the insertion loss of the network, but could in principle be any function of frequency related to the network. It is usual to measure roll-off as a function of logarithmic frequency, consequently, the units of roll-off are either decibels per decade (dB/decade) or decibels per octave (dB/8ve). Decade being a x10 increase in frequency and octave being a x2 increase in frequency. Note that roll-off can occur with decreasing frequency as well as increasing frequency.
Title Classical control using H [infinity] methods: an introduction to design Authors J. William Helton, Orlando Merino, Society for Industrial and Applied Mathematics Edition illustrated Publisher SIAM, 1998 ISBN 0898714249, 9780898714241
pages 23-25
Title Event-related potentials: a methods handbook Author Todd C. Handy Editor Todd C. Handy Contributor Todd C. Handy Edition illustrated Publisher MIT Press, 2004 ISBN 0262083337, 9780262083331 Length 404 pages 89-92, 107-109
Title Fundamentals of EEG Technology: Basic concepts and methods Authors Fay S. Tyner, John Russell Knott, W. Brem Mayer Editor W. Brem Mayer Photographs by John Russell Knott, W. Brem Mayer Edition illustrated Publisher Lippincott Williams & Wilkins, 1983 ISBN 089004385X, 9780890043851 Length 332 pages 101-102