Hi,

i performing a HB two-tone analysis and want to know the response on small-signals at the selected two frequencies. Lets say f1 and f2.

In mixer designs one can use the small-signal HB to get the small-signal parameters for n*f1+m*f2+k*fmix. Unfortunately this is only possible at mixing frequecies for k=1 or k=-1 and not k=0. If k could be set to zero there would be no problem, but thats not possible.

Maybe it is possible to get the jacobian directly which would be the simplest solution.

What can i do to get the small-signal behavior at n*f1+m*f2 without an additional frequencie shift?

Greetings

Kay

i performing a HB two-tone analysis and want to know the response on small-signals at the selected two frequencies. Lets say f1 and f2.

In mixer designs one can use the small-signal HB to get the small-signal parameters for n*f1+m*f2+k*fmix. Unfortunately this is only possible at mixing frequecies for k=1 or k=-1 and not k=0. If k could be set to zero there would be no problem, but thats not possible.

Maybe it is possible to get the jacobian directly which would be the simplest solution.

What can i do to get the small-signal behavior at n*f1+m*f2 without an additional frequencie shift?

Greetings

Kay

One of my collegues advised me to use LSSP for this problem. Unfortunately, this gives me not the "small-signal" (incremental) solution but only the large-signal steady-state operation points, which seems to be useless for me.

Therefore the solution seems only to be possible, by getting the HB small-signal (mixer) values at the large-signal frequencies themselfs . By default this is not possible, since the small signal is only calculated at k=1 and k=-1 (the mix(3) component) but not at k=0.

Is there a workaround or should i use an other simulation tool?

bye

Kay