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Recent content by collinjie

  1. C

    A problem I never met!

    thank you very much! The wet you told me is quite useful to me! In fact i need an amplifier capable of outputting voltage from +220V to -220V.
  2. C

    A problem I never met!

    I need an amplifier capable of outputting voltage from +220V to -220V.. Thanks for all your information about the chips or suggestion.
  3. C

    How do a lock-in amplifier and coordinate converter work?

    I need your help I am not sure about how a lock-in amplifier works in the detection of the higer harmonic signals. And how does a coordinate converter work? Hope someone can tell me some models of the lock-in amplifier and coordinate converter.
  4. C

    What factors should be considered when choosing an op-amp?

    Re: Op-Amp Selection The input voltage range should be considered too.
  5. C

    Help me with an amplifier

    to kral : thank you and you are absolutely correct. The gain is 1.775±0.01 is acceptable. i am a greenhand thanks again
  6. C

    Help me with an amplifier

    to kral: Gain=1.775, accuracy is ±0.01 and the bandwidth is not very important
  7. C

    Help me with an amplifier

    Hello! I need an amplifer that can be used to amplify a voltage range from 10mV to 200mV. Because the voltage is quite low i can not find a suitable amplifer. At the beginning, i choose MAX4190, but i find it is not suitable.
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