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超宽频带的90°有源电桥B
Authors
江永琛
王锦清
范庆元
Publication date
1 January 2011
Publisher
Abstract
本发明提供一种超宽频带的90°有源电桥,包括:2n级级联的全通滤波器构成的第一全通滤波网络;和2n级级联的全通滤波器构成的第二全通滤波网络;其中第一全通滤波网络的第i级与第二全通滤波网络的第2n-i+1级的角频率乘积为一定值;n为正整数,i=1,2,......2n。本发明的上述超宽频带的90°有源电桥用于在基带信号的宽频带范围内对信号进行稳定的90°移相,其相位误差范围小于1°,并可对移相后的两路信号进行加、减法以及增益放大,可以很好的应用到接近零频的基带宽频信号的单边带输出,同时还可以对微弱信号进行100倍的增益放大;而且在实现增益放大的同时其相位误差也仍在2°范围内,移相特性比较稳定
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Shanghai Astronomical Observatory,Chinese Academy of Sciences
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Last time updated on 20/01/2020