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# Transient noise analysis of mixer based circuit

Last post Wed, Mar 21 2012 3:15 AM by Andrew Beckett. 1 replies.
 Started by RFQuery 18 Mar 2012 04:33 AM. Topic has 1 replies and 2402 views
• #### Sun, Mar 18 2012 4:33 AM

• RFQuery
• Joined on Wed, Jul 20 2011
• Posts 89
• Points 1,270
Transient noise analysis of mixer based circuit
 Dear all,can anybody tell is it possible to do transient noise analysis of mixer based circuit. If yes how we can do it for the mixer based circuit ?How it can be compared with Pnoise analysis. Which one is better ? Kind Regards
• Post Points: 20
• #### Wed, Mar 21 2012 3:15 AM

Re: Transient noise analysis of mixer based circuit
 Yes, it's possible. You can use transient noise for anything. However, it won't be anywhere as efficient as pnoise. The benefit of transient noise would be that you can see large signal noise effects (which are not normally a problem for mixers), but the downside is that you'd need a long simulation with short timesteps to capture all the noise information. pnoise just requires you to do a PSS on a single cycle of the mixer LO, and then an efficient small-signal noise simulation after that - akin to how you would use noise around the DC operating point of an amplifier rather than using transient noise for that.Transient noise is a bit of a sledgehammer to crack a nut in this case. Regards,Andrew.
• Post Points: 5
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 Started by RFQuery at 18 Mar 2012 04:33 AM. Topic has 1 replies.
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