Instrumentation Amplifier (Signal Conditioning Circuit)

Discussion in 'Analog & Mixed-Signal Design' started by Atiera Othman, Feb 21, 2016.

  1. Atiera Othman

    Thread Starter New Member

    Feb 16, 2016
    hello, I am Ara
    I need to implement a signal conditioning circuit for prtd(pt100)
    below i attach my circuit using lt spice
    In my signal conditioning circuit. the Vin for Wheatstone bridge is 10V. I want to produce a 1V for Vout at instrumentation amplifier.
    I want to ask an opinion about my progress on this circuit.
    what is ratiometric on bridge circuit?
    how to linearization rtd ?
    what does zero compensation mean ?
    What is CMRR and GBP in this circuit?
    how about the filter part?
    what should i consider about at this part?
    I really don't have idea about a signal conditioning circuit design.
    please help me.
    you kindness really help my research on this design.
  2. crutschow


    Mar 14, 2008
    You will get much better performance if you use a dedicated instrumentation IC, rather than building up one from discrete op amps and resistors.
    The mismatch of standard 1% resistors will give a poor common-mode rejection of the amp.