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

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
11/07/04 17:17
Read: times


 
#80610 - RE: The perfect design..
Responding to: ???'s previous message
Hi Steve, Thanks for your reply,

why he needs to do a precision rectifier anyway, when its appears that direct conversion will yield a higher precsion result. This all seems to be straining at gnats.

I said I am using PCF8591 ADC which is a unipolar input ADC and can't handle negative potential signals. And for measuring current of the order of several hundred Ampere I am using CT which when terminated with a burden resistor produces potential in propotion to current flowing. This signal thus generated has identical waveform to the current flowing and this sinusoidal signal is going well below zero and thus can't feed directly to unipolar ADC and thus I need to rectify it so that the -ve half cycles are rectified to +ve side. Since an ordinary rectifier will show the diode drops which is not tolerable thus I need a precision rectifier.

Fine,in a 14bit plus accurate system, but for 7 bits ?

You are very right steve, for 7 bit precision that is my present requirement all these grounding and other techniques are certainly an over engineering, but as I have already said soon I will be using 12 bit ADC AD574 in my product I am preparing my self for that.

Regards,
Prahlad Purohit

List of 127 messages in thread
TopicAuthorDate
WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
   RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
      RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
         RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
            RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
               RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
                  RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
                     RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
                        RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
                     RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
                        RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
                           RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
                              RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
                                 RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
         RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
            RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
         RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
            RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
         RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
            RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
               RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
                  RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
   RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
   Single Supply full wave rectifier.            01/01/70 00:00      
      RE: Single Supply full wave rectifier.            01/01/70 00:00      
         Kai can I use this or there\'s any better            01/01/70 00:00      
            RE: Kai can I use this or there\\\'s any            01/01/70 00:00      
               RE: Kai can I use this or is there any            01/01/70 00:00      
                  RE: Kai can I use this or is there any            01/01/70 00:00      
                     RE: Kai can I use this or is there any            01/01/70 00:00      
                        RE: Kai can I use this or is there any            01/01/70 00:00      
                     RE: Kai can I use this or is there any            01/01/70 00:00      
                        RE: Kai can I use this or is there any            01/01/70 00:00      
                           RE: Kai can I use this or is there any            01/01/70 00:00      
                        RE: Kai can I use this or is there any            01/01/70 00:00      
                           RE: Kai can I use this or is there any            01/01/70 00:00      
                  RE: Kai can I use this or is there any            01/01/70 00:00      
                     RE: Kai can I use this or is there any            01/01/70 00:00      
                        RE: Kai can I use this or is there any            01/01/70 00:00      
                           RE: Kai can I use this or is there any            01/01/70 00:00      
                     RE: Kai can I use this or is there any            01/01/70 00:00      
                        RE: Kai can I use this or is there any            01/01/70 00:00      
                        Clamp Diodes for Output.            01/01/70 00:00      
                           RE: Clamp Diodes for Output.            01/01/70 00:00      
                              RE: Clamp Diodes for Output.            01/01/70 00:00      
                                 RE: Clamp Diodes for Output.            01/01/70 00:00      
                                    RE: Clamp Diodes for Output.            01/01/70 00:00      
                                       RE: Clamp Diodes for Output.            01/01/70 00:00      
                                       RE: Clamp Diodes for Output.            01/01/70 00:00      
                                          RE: Clamp Diodes for Output.            01/01/70 00:00      
                                             RE: Clamp Diodes for Output.            01/01/70 00:00      
                                       RE: Clamp Diodes for Output.            01/01/70 00:00      
                                          RE: Clamp Diodes for Output.            01/01/70 00:00      
                           RE: Clamp Diodes for Output.            01/01/70 00:00      
                              RE: Clamp Diodes for Output.            01/01/70 00:00      
                                 RE: Clamp Diodes for Output.            01/01/70 00:00      
                                    RE: Clamp Diodes for Output.            01/01/70 00:00      
                                       RE: Clamp Diodes for Output.            01/01/70 00:00      
                                          RE: Clamp Diodes for Output.            01/01/70 00:00      
                                    RE: Clamp Diodes for Output.            01/01/70 00:00      
                              RE: Multiple ADCs            01/01/70 00:00      
                                 Hey, 8 bits            01/01/70 00:00      
                                    RE: Hey, 8 bits            01/01/70 00:00      
                                       RE: Hey, 8 bits            01/01/70 00:00      
                                          RE: Hey, 8 bits            01/01/70 00:00      
                                             RE: Hey, 8 bits            01/01/70 00:00      
                                 RE: Multiple ADCs            01/01/70 00:00      
                                    RE: Multiple ADCs            01/01/70 00:00      
                                       RE: Multiple ADCs            01/01/70 00:00      
            RE: Kai can I use this or there\\\\\\\\\\\\\\\'s a            01/01/70 00:00      
      RE: Single Supply full wave rectifier.            01/01/70 00:00      
         RE: Single Supply full wave rectifier.            01/01/70 00:00      
   RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
      RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
      RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
         RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
            RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
   RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
   RE: WEOT: Precision rectifier for 50Hz.            01/01/70 00:00      
   Excellent Reading for ADC Grounding            01/01/70 00:00      
      RE: Excellent Reading for ADC Grounding            01/01/70 00:00      
         RE: Excellent Reading for ADC Grounding            01/01/70 00:00      
            RE: Excellent Reading for ADC Grounding            01/01/70 00:00      
   How good is this scheme?            01/01/70 00:00      
      RE: How good is this scheme?            01/01/70 00:00      
         RE: How good is this scheme?            01/01/70 00:00      
            RE: How good is this scheme?            01/01/70 00:00      
               RE: How good is this scheme?            01/01/70 00:00      
                  RE: How good is this scheme?            01/01/70 00:00      
                     RE: more            01/01/70 00:00      
                        RE: more            01/01/70 00:00      
                           RE: more            01/01/70 00:00      
                              RE: more            01/01/70 00:00      
                                 RE: more            01/01/70 00:00      
                                    RE: more            01/01/70 00:00      
                  RE: How good is this scheme?            01/01/70 00:00      
                     RE: How good is this scheme?            01/01/70 00:00      
                        RE: How good is this scheme?            01/01/70 00:00      
                           RE: How good is this scheme?            01/01/70 00:00      
                              RE: How good is this scheme?            01/01/70 00:00      
                                 RE: How good is this scheme?            01/01/70 00:00      
                                    RE: How good is this scheme?            01/01/70 00:00      
                                       RE: How good is this scheme?            01/01/70 00:00      
                                 RE: How good is this scheme?            01/01/70 00:00      
                                    RE: How good is this scheme?            01/01/70 00:00      
                     RE: How good is this scheme?            01/01/70 00:00      
                        RE: How good is this scheme?            01/01/70 00:00      
                           RE: How good is this scheme?            01/01/70 00:00      
                              RE: How good is this scheme?            01/01/70 00:00      
                           The perfect design..            01/01/70 00:00      
                              RE: The perfect design..            01/01/70 00:00      
                                 RE: The perfect design..            01/01/70 00:00      
                                    RE: The perfect design..            01/01/70 00:00      
                                 RE: The perfect design..            01/01/70 00:00      
                                    Correction            01/01/70 00:00      
                                    RE: The perfect design..            01/01/70 00:00      
                                       RE: The perfect design..            01/01/70 00:00      
                              RE: The perfect design..            01/01/70 00:00      
         RE: How good is this scheme?            01/01/70 00:00      
         RE: How good is this scheme?            01/01/70 00:00      
            RE: How good is this scheme?            01/01/70 00:00      
               ADC7135            01/01/70 00:00      
   Kai, please chekck your mailbox.            01/01/70 00:00      
   Reducing the loop seems no way to elim.            01/01/70 00:00      
      RE: Reducing the loop seems no way to el            01/01/70 00:00      
   ICL7135            01/01/70 00:00      
      RE: ICL7135            01/01/70 00:00      

Back to Subject List