增益带宽积

”’增益带宽积”’（{{lang-en|”’gain–bandwidth product”’}}，缩写：{{lang|en|”’GBWP”’, ”’GBW”’, ”’GBP”’ or ”’GB”’}}）是指一个[[放大器]]带宽以及其相应增益的乘积。

”’增益带宽积”’（{{lang-en|”’gain–bandwidth product”’}}，缩写：{{lang|en|”’GBWP”’, ”’GBW”’, ”’GBP”’ or ”’GB”’}}）是指一个[[放大器]]带宽以及其相应增益的乘积。

诸如[[运算放大器]]等电子器件被设计为具有单极频率响应，增益带宽积几乎与工作点处的增益无关；这些器件的带宽增益积等于一个单位增益带宽。<ref>{{cite book|title=Analog And Digital Electronics|author=U. A. Bakshi and A. P. Godse|publisher=Technical Publications|year=2009|isbn=978-81-8431-708-4|pages=2–5|url=http://books.google.com/books?id=Nw-1RETEUFUC&pg=SA1-PA105}}</ref>当放大器以[[负反馈放大器|负反馈]]的形式连接在电路中时，整个[[负反馈]]网络提供的增益低于[[开环增益]]（{{lang|en|Open-loop gain}}）。这时，闭环放大器网络的增益带宽积就近似等于开环放大器网络的增益带宽积。S.斯里尼瓦桑指出：“有限增益带宽积这项参数描述了运算放大器增益对于频率的依赖关系。”<ref>Srinivasan, S. “A universal compensation scheme for active filters.” International Journal of Electronics 42.2（Feb. 1977）: 141. Science & Technology Collection. EBSCO. Dallas Public Library <http://www.dplibrary.org {{webarchive|url=https://web.archive.org/web/20110630045749/http://www.dplibrary.org/ |date=2011-06-30 }}>, Dallas, TX, USA. retrieved 31 July 2009 from <http://search.ebscohost.com/login.aspx?direct=true&db=syh&AN=5259750&site=ehost-live>.</ref>

诸如[[运算放大器]]等电子器件被设计为具有单极频率响应，增益带宽积几乎与工作点处的增益无关；这些器件的带宽增益积等于一个单位增益带宽。<ref>

{{cite book

| title = Analog And Digital Electronics

| author = U. A. Bakshi and A. P. Godse

| publisher = Technical Publications

| year = 2009

| isbn = 978-81-8431-708-4

| pages = 2–5 <!– this really is page 2-5, not pages 2–5 –>

| url = http://books.google.com/books?id=Nw-1RETEUFUC&pg=SA1-PA105

}}</ref>当放大器以[[负反馈放大器|负反馈]]的形式连接在电路中时，整个[[负反馈]]网络提供的增益低于[[开环增益]]（{{lang|en|Open-loop gain}}）。这时，闭环放大器网络的增益带宽积就近似等于开环放大器网络的增益带宽积。S.斯里尼瓦桑指出：“有限增益带宽积这项参数描述了运算放大器增益对于频率的依赖关系。”<ref>Srinivasan, S. “A universal compensation scheme for active filters.” International Journal of Electronics 42.2（Feb. 1977）: 141. Science & Technology Collection. EBSCO. Dallas Public Library <http://www.dplibrary.org {{webarchive|url=https://web.archive.org/web/20110630045749/http://www.dplibrary.org/ |date=2011-06-30 }}>, Dallas, TX, USA. retrieved 31 July 2009 from <http://search.ebscohost.com/login.aspx?direct=true&db=syh&AN=5259750&site=ehost-live>.</ref>

== 概述 ==

== 概述 ==