comparator with hysteresis, upper and lower trigger points

Discussion in 'Homework Help' started by PG1995, Nov 13, 2012.

  1. PG1995

    Thread Starter Active Member

    Apr 15, 2011
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    Hi

    Please help me with this query. Thank you.

    NOTE: In the reference, given at the bottom in the attachment, there is no mentioning of upper hysteresis limit. So, perhaps there is a typographical error.

    Regards
    PG
     
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  2. WBahn

    Moderator

    Mar 31, 2012
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  3. Austin Clark

    Member

    Dec 28, 2011
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    Hey. Do you mind letting us know what book that's from? Looks pretty decent.
     
  4. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    It's a typo, but we can't tell for sure what it should read until we see the fig. 10 .
    If it's the same as fig. 13.7 (inverting Schmitt trigger), Then the statement should read "The output snaps high when the input signal crosses the lower hysteresis limit in a negative-going direction, and it remains high until the signal crosses the upper limit in a positive-going direction."
    Of course, you could deduce this by reading the upper part of your attachment.
     
    Last edited: Nov 14, 2012
  5. PG1995

    Thread Starter Active Member

    Apr 15, 2011
    753
    5
    Thank you, everyone.

    Sure.

    The Figure 6-10 (which I think you were referring to) does not show any circuit. But as it has been suggested by someone that it could be the case that the top reference is talking about inverting Schmitt trigger and the other one about non-inverting configuration. Thanks.

    Regards
    PG
     
  6. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    Fig. 6-10 is obviously describing a noninverting Schmitt trigger.
     
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