One question about SPICE2

[tony_taoyh]

For one amplifier, I want to find the distortion.

So, I can use one transient analysis, then, do the fourier analysis to get
the HD2, HD3.

From one book:
"Analog integrated circuits for communication, priciples, simulation and design.
1991 Version. Page 13, under (Eq. 1.8),

It mentioned:
From Spice2 for a sinusodial input (100 kHz) of 10 mV. HD3 = 0.295%. ( For this data, TSTEP in the .TRAN specification is set to 0.1us.)

How to get the value of TSTEP of 0.1 us, according to the amplitude of
sinusodial input and the HD3?

Thanks a lot.

 

[sunking]

Two serial voltage: 10mV 100KHz, 29.5uV 300KHz

 

[tony_taoyh]

I mean, how to get the value of 0.1 us for TSTEP...

According the input, HD3, and freq.

Thanks.