Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
04/23/11 15:39
Modified:
  04/23/11 15:41
Read: times


 		 #181995 - a question?
Responding to: ???'s previous message
Kai said:

Single supply OPamps loose specifications when emitting voltages at the output near 0V. To avoid trouble the negative supply pins are pulled down to about -0.3V. A simple Schottky diode biased by a current of 10...20mA can easily provide this auxiliary potential. If you have a -5V supply voltage drive the Schottky by a 250...470R resistor and put a 100nF cap in parallel to the diode.

Hi Kai,do you mean -0.3V is generated using only single supply or -5 volt must be existed!?
if -5 volt is needed-what is the profit?

List of 42 messages in thread
TopicAuthorDate
Signal Conditioning!            01/01/70 00:00      
   AC-coupling don't work to 0Hz and kills DC info            01/01/70 00:00      
      subtracting 8.4V            01/01/70 00:00      
         Also question if 8.5V is guaranteed lowest input.            01/01/70 00:00      
            Is Instrumentation Amplifier is good choise?            01/01/70 00:00      
               Instrumentation Amplifier or op-amp            01/01/70 00:00      
                  Thanks Erik            01/01/70 00:00      
   A scheme using the OP-27...            01/01/70 00:00      
      Kai,You are always Positive!            01/01/70 00:00      
      Another scheme...            01/01/70 00:00      
         Take care with OPA2743...            01/01/70 00:00      
            Thanks Again Kai            01/01/70 00:00      
         -5 Volt Supply            01/01/70 00:00      
            Again            01/01/70 00:00      
               Wrong            01/01/70 00:00      
                  No,only 2 questions!            01/01/70 00:00      
                     Two answers...            01/01/70 00:00      
                        Thank you very much dear Kai            01/01/70 00:00      
         a question?            01/01/70 00:00      
      Please Tell Me your Comments!            01/01/70 00:00      
         ?            01/01/70 00:00      
            Yes,kai            01/01/70 00:00      
               Differential signaling            01/01/70 00:00      
                  Some Questions!            01/01/70 00:00      
                     Precision            01/01/70 00:00      
                        Thanks Per,            01/01/70 00:00      
                     Some answers...            01/01/70 00:00      
                        factor of 4            01/01/70 00:00      
                           Don't forget the subtracting scheme!            01/01/70 00:00      
                        kindness            01/01/70 00:00      
                        Deduction!            01/01/70 00:00      
                           Correct            01/01/70 00:00      
                        nature of signal!            01/01/70 00:00      
                           I'm sorry?            01/01/70 00:00      
                              A bit more            01/01/70 00:00      
                                 This is your signal?            01/01/70 00:00      
                                    I have said this in the first post            01/01/70 00:00      
                                       Any link?            01/01/70 00:00      
                                          calibrating,            01/01/70 00:00      
                           Is there a datasheet in english?            01/01/70 00:00      
                              No,i have searched very much            01/01/70 00:00      
            DYNAMIC RESPONSE            01/01/70 00:00      

Back to Subject List