Apr 11, 2019 #1 V vijayb Newbie level 2 Joined Apr 11, 2019 Messages 2 Helped 0 Reputation 0 Reaction score 0 Trophy points 1 Activity points 13 In OP400A device how to improve CMRR by using 3 stage servo circuit. input resistor are used 0.1% tollerence,and common mode volatge is +/-12V but results are getting 120dB max how to improve for this device. circuit is aatched as below.
In OP400A device how to improve CMRR by using 3 stage servo circuit. input resistor are used 0.1% tollerence,and common mode volatge is +/-12V but results are getting 120dB max how to improve for this device. circuit is aatched as below.
Apr 11, 2019 #2 FvM Super Moderator Staff member Joined Jan 22, 2008 Messages 52,442 Helped 14,754 Reputation 29,790 Reaction score 14,108 Trophy points 1,393 Location Bochum, Germany Activity points 298,200 There's no common mode voltage source in the circuit. Please clarify.
Apr 11, 2019 #3 V vijayb Newbie level 2 Joined Apr 11, 2019 Messages 2 Helped 0 Reputation 0 Reaction score 0 Trophy points 1 Activity points 13 V7 source is the common mode voltage provided as 12V
Apr 11, 2019 #4 FvM Super Moderator Staff member Joined Jan 22, 2008 Messages 52,442 Helped 14,754 Reputation 29,790 Reaction score 14,108 Trophy points 1,393 Location Bochum, Germany Activity points 298,200 Makes no sense. OP400 common mode is only set by supply voltage sources V1 and V2.