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Subject: Re: Finding 0 voltage in analog signals

Date: 01/23/02 at 3:52 PM
Posted by: Russ Kincaid
E-mail: russlk@yahoo.com
Message Posted:

In Reply to: Finding 0 voltage in analog signals posted by Corry on 01/22/02 at 5:22 PM:

Sounds like you are on the right track. I don't understand why you need more than one op amp? If you use a comparator, like the LM311 or LM211, with one input grounded, the zero crossing detection can be as low as 7.5 millivolts for the LM311 or 3.0 millivolts for the LM211. You can get even closer with an offset adjustment.

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