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???
12/20/04 07:42
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#83494 - want noise reduction method!
i have 8 channel signal conditioning board, on which the
signal is pass through pre amplify->filter->final amplify->output

all channels are identical in schmatic,on pcb board,for the final amplify stage,i use 2 quad
package amplifers(TI's opa4277), one 4277 placed more closed to output( here named IC1) than another(IC2).the pcb traces from IC2 to output are about 1.5 times longer than that of IC1.
i measured the output noise of the opa4277 by given a DC,and found that the Vp-p is about 10mV for IC1 and 20mV for IC2.
due to space constraint,i can't make the traces equal,but
i wonder if there's any method to reduce the output noise of ic2
to the same of ic1?

Best Regards

List of 14 messages in thread
TopicAuthorDate
want noise reduction method!            01/01/70 00:00      
   RE:Want noise reduction method!            01/01/70 00:00      
      FAQ            01/01/70 00:00      
   My car makes pling pling...            01/01/70 00:00      
      sorry for insufficient detail            01/01/70 00:00      
         But we need them...            01/01/70 00:00      
            more detail            01/01/70 00:00      
               How looks the 'noise' like?            01/01/70 00:00      
                  noise performance decription            01/01/70 00:00      
                     Manufacturing tolerances            01/01/70 00:00      
                     'scope ground probe            01/01/70 00:00      
   what micro?            01/01/70 00:00      
      is it necessary            01/01/70 00:00      
         Yes, it is!            01/01/70 00:00      

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