sethtalk
Member level 3
hi, dear all:
i do noise analysis for fully OTA with cap. feedback,
because the output signal/noise is sampled at freq=30MHz,
i write the commend in hspice code:
.nose v(outp,outn) vd 1
.ac dec 100 1 300Mhz
.sample fs=30x
the summary about noise power shows that the total output noise power is 53uV-rms,but the total output sampled noise power is zero,
why the .sample commend is not work ?
i do noise analysis for fully OTA with cap. feedback,
because the output signal/noise is sampled at freq=30MHz,
i write the commend in hspice code:
.nose v(outp,outn) vd 1
.ac dec 100 1 300Mhz
.sample fs=30x
the summary about noise power shows that the total output noise power is 53uV-rms,but the total output sampled noise power is zero,
why the .sample commend is not work ?