substrate terminal for passive devices - RF Cafe Forums
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Post subject: substrate terminal for passive devices Posted: Wed Dec 20, 2006 11:10 am
Joined: Tue Nov 14, 2006 7:21 pm
In CMOS designs is there any need to connect the substrate terminal of passive devices to ground?
Post subject: Posted: Fri Jan 26, 2007 2:48 am
Joined: Fri Jan 26, 2007 2:40 am
It is probably best to make some sort of connection to ground. If the device is setting in a WELL (such as a PMOS) the "substrate" (not really a sub tie but an NWELL tie) is used to place the WELL to a high voltage otherwise the device will not work properly.
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