Help me to find I/P impedance for RF mixer in Cadence

[elbadry]

I am designing an RF Mixer using Cadence tool (IC5033). I need to find the i/p imoedance looking into the LO port. How should I do that?

I thought of using pss with psp and finding Z11 but wouldn't this be the small signal impedance?

thanks in advance...

 

[nxing]

Mixers in Cadence

Z11 should be the small signal impedance, i think.

 

[elbadry]

Re: Mixers in Cadence

Would it be correct to measure the small signal impedance? What I mean is that the VCO is applying a la rge signal and driving the mixer so would it be correct to use the value of Z11 as the impedance seen by the VCO?

thanks again

 

[yibinhsieh]

Re: Mixers in Cadence

Maybe PAC in Spectre can slove this question.

Yibin.