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Recent content by walalala

  1. W

    How to design low-pass filter

    Right , I learned from some literatures that LT1028 could be LNA of nanovolt signal， so I want to use the reference circuit in the datasheet .
  2. W

    How to design low-pass filter

    What you said above is useful . I have got it and can't wait to finish my circuit . Thanks for helping me a lot (y)(y)(y).
  3. W

    How to design low-pass filter

    Thanks for your advice. Now i have decided to use active filter that gain is 1 , so there is a new question , how i select a suitable op amp as the filter or which property more important ? Precision , low noise , band , swing of input and output and others ? Or I select it straightway on the...
  4. W

    How to design low-pass filter

    Hi I want to design a circuit to amplify low frequency and weak signal，so I need a LPF that corner frequency is 5kHz .I need to know which kind of filter is more suitable,active filter or LC filter? Is it right to choose Butterworth filter and then select the capacitance and resistance？ How...
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