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信号地(或模拟地)和大地(机壳地或屏蔽地)连接问题



众所周知,信号地和模拟地是要分开处理的,那么信号地(或模拟地)与大地(机壳地或屏蔽地)之间应该怎么处理?

1、我见过有人把信号地和大地之间,用0Ω电阻相连接,最后接入地线。这样的话,静电释放岂不是都要经过信号地?

2、我也见过用1MΩ电阻和1000pf电容相接的电路。

想问一下大家,应该怎么处理信号地和大地,才可以有良好的电磁屏蔽效果和静电保护