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Kai Klaas
02/08/06 19:50
Read: 1466 times
Germany


 
#109572 - Yes, still required
Responding to: Prahlad J. Purohit'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 ]      Prahlad J. Purohit      02/08/06 08:08      
   Yes, still required      Kai Klaas      02/08/06 19:50      
      Please Elaborate      Abhishek Singh      02/08/06 21:21      
      Input signal.      Prahlad J. Purohit      02/08/06 21:59      
         CMIVR      Kai Klaas      02/09/06 06:16      
            Input smaller than reference.      Prahlad J. Purohit      02/09/06 06:36      
               yes works      Abhishek Singh      02/09/06 08:07      
               Will work!      Kai Klaas      02/09/06 18:36      
                  Re: Will Work.      Prahlad J. Purohit      02/10/06 07:29      
         are you aware      Erik Malund      02/09/06 06:48      
            Searched entire page.      Prahlad J. Purohit      02/09/06 07:08      
               sorry, it seems to be gone      Erik Malund      02/09/06 07:46      
                  Re: LPCxxx App note.      Prahlad J. Purohit      02/10/06 07:37      

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