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I am trying to do a passive switching mixer volatge conversion gain simulation. The circuit consists of a MOS transistor driving a resistive load. The gate of MOS is driven by a rail to rail square pulse.
I tried the steps given in the Application note "Mixer design using Spectre RF " , but it didn't give meaningful results.
Is there any application note that deals specifically with passive switching mixers with LO being driven by a rai to rail signal or a similar situation ?
There are some challenges with measuring IP3 with passive mixers due to limitations of certain device models (e.g. bsim3v3 and bsim4) - there are a number of academic papers on this problem. But I'm not sure whether this is what you mean by "didn't give meaningful results". That's a rather open statement...
In reply to Andrew Beckett:
In reply to lahsivece:
There are no pictures in your posts. You can attach pictures via the Options tab when posting a reply.
The pictures were not attached. If you paste the pictures in the post, it doesn't work - because they don't get uploaded to the forum server. So in your last post there was only one picture (the PAC output response) - but I think the text talks about a picture of the testbench too.
Please find testbench image attached.
I'd suggest you contact customer support. I'm a bit pushed for time this week to take a look - maybe somebody else on the forum can try it.
It's not an issue.
I will contact customer support for the same.
Looks like my earlier post didn't make it onto the forum...
I agree with Andrew - this sort of question is best handled by Customer Support - they can dedicate more time and energy to answer questions.
There is an existing Solution on Cadence Online Support that you may want to look at:
Also, if you are using BSIM transistor models in your circuit, see this paper:
LINFET: A BSIM Class FET Model with Smooth Derivatives at Vds=0
by Lawrence F. Wagner, C. Michael Olsen.
IBM Systems & Technology Group, Global Engineering Solutions.
Customer Support Director - Analog/Mixed-Signal/RF AEs
Cadence Design Systems, Inc.
In reply to Tawna:
Thanks for the information.
I have already raised this issue with customer support.
What is the Case number and I'll keep an eye on it.
Hi Vishal, I already found it. No need to respond.
Hi Tawna ,
Case Number assigned is 45539809.