IC693CPU363-BF 单端驱动器

6SE7021-3TP50-Z=43+G91+K80
MVI46-MCM
6GK1210-0SA00
LEYBOLD CM330
1785-TR10B2
6EV3054-OFC
3HAC046277-001
4351B
IC698CPE020
1326AB-B520F-M2L

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描述

RS-422A采用平衡驱动、差分接收电路,从根本上取消了信号地线,大大减少了地电平所带来的共模干扰。平衡驱动器相当于两个单端驱动器,其输入信号相同,两个输出信号互为反相信号,图中的小圆圈表示反相。外部输入的干扰信号是以共模方式出现的,两极传输线上的共模干扰信号相同,因接收器是差分输入,共模信号可以互相抵消。只要接收器有足够的抗共模干扰能力,就能从干扰信号中识别出驱动器输出的有用信号,从而克服外部干扰的影响。

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