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urgent: chopper stabilized amplifier's amplifier stage does not work



Jan 1, 1970
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



Jan 1, 1970
tiger66 said:
I get a "timestep too small" error message every time I simulate.

Yes. EWB, Multisim's predecessor does that a lot too. Can you simplify the
circuit at all ?