How to plot the data in MICROCAP7 without offset?

[keen]

hi boys,

a question about microcap7.
i just want to plot the data
i used SDT(v(1)) integration on existing data
the result graph has right amp. & frequency
but it has ofset. How to remove this ofset?

The root function is v(1) =A.sin(kt),
SDT(v(1)) must gave - A/k.cos(kt)

but from SDT I get - A/k.cos(kt) + A and this is wrong .

who know? please tell me ..

regards Keen

 

[andythompson]

Re: MICROCAP SDT ??

I think Micro-Cap is correct.

You are thinking of the indefinite integral formula Integral(sin()) = -cos()

The SDT operator in Micro-Cap does a definite integration (one with limits) and integrates from T=0 to T=End. The definite integral of SIN(2*PI*F0*T) is 1-COS(2*PI*F0*T).