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The first figure show the transient of the opamp. I don't konw that what is the problem for the output , when i don't add the syntax "accurate" to .options.
This opamp is for delta-sigma adc. my system clock is 6.144MHz.
process : 0.18UM 1.8V
.op
.tran 162.76n 702.8u start=35.55u...
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