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???
02/09/06 02:50
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#109572 - Yes, still required
Responding to: ???'s previous message
Prahlad said:
Now, I want to know is this red led required even with LM311 based comparators the component values are ditto same as you suggested for LPC922 only diffrence is with LM311 i am using +5V single supply where as LPC922 was 3V powered.


We refer to this thread:

http://www.8052.com/forum/read.phtml?id=98954

and to this circuit:



Yes, it's still required to guarantee that potential at inverting input is always within common-mode input voltage range of comparator!

By the way, why not using a LMV331 instead of LM311?

Kai

List of 13 messages in thread
TopicAuthorDate
Zero cross detector led. [ Kai ]            01/01/70 00:00      
   Yes, still required            01/01/70 00:00      
      Please Elaborate            01/01/70 00:00      
      Input signal.            01/01/70 00:00      
         CMIVR            01/01/70 00:00      
            Input smaller than reference.            01/01/70 00:00      
               yes works            01/01/70 00:00      
               Will work!            01/01/70 00:00      
                  Re: Will Work.            01/01/70 00:00      
         are you aware            01/01/70 00:00      
            Searched entire page.            01/01/70 00:00      
               sorry, it seems to be gone            01/01/70 00:00      
                  Re: LPCxxx App note.            01/01/70 00:00      

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