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chopper stabilized amplifier design

Discussion in 'Electronic Design' started by [email protected], Mar 8, 2007.

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  1. Guest

    Hi All
    I am trying to simulate a chopper stabilized amplifier circuit using
    multisim or LTspice.

    Does anyone have any resource(i.e. schematic files or detail
    schematics) related to implementing chopper stabilized amplifier using
    Multisim or LTspice. Could you please send me a copy?

    I really appreciate your help

    Thanks in advance
  2. rush3k

    rush3k Guest

    I have not noticed any chopper modulator type device or component part
    in LTSpice, then again I'm not a regular user of the software.
    However, you can design your chopper modulator using MOSFETs as
    switches. See the paper: "A CMOS Low-Noise Instrumentation Amplifier
    Using Chopper Modulation" by Nielsen and Bruun.
  3. Ken Smith

    Ken Smith Guest

    The LTC1043 is in there.

    You can also make a fairly simple model of a relay.
  4. tiger66

    tiger66 Guest

    I searched the component name LTC1043 on LTspice, but I can't seem to
    find it. Is it an extra component I need to download?

    If you have one, can you please email me a copy?

    I simulate my chopper stabilized circuit on multisim because I can't
    find a way to generate spectral analysis of a signal on LTspice. Can
    LTspice do spectral analysis?

    A major problem I have right now is I can't get the opamp stage of my
    chopper stabilized amplifier to work. I try to simulate Fig4a in the
    article "A CMOS Chopper Amplifier" by Christian C. ENZ.

    I can get the input modulator to work but after I attach the opamp, I
    get a "timestep too small" error message every time I simulate. I
    tried changing the end time to a big number, but it doesn't fix the
    problem either :(

    Can someone please give me some assistant.

    I can email you the article and my multisim file if that makes it
    easier to understand my problem

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