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cmos down conversion mixer (Read 11821 times)

udaykumarchintala Junior Member Offline Posts: 22 ahmedabad	Re: cmos down conversion mixer Reply #15 - Mar 02^nd, 2008, 11:04am hi, thanks for ur reply....... From the links you have sent,I understood that from the gain equation we can directly calculate the size of the RF transistors from the biasing current and transconductance,no need to find the poles and follow the design procedure of a cascode....Is it right? Thanks......
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udaykumarchintala Junior Member Offline Posts: 22 ahmedabad	Re: cmos down conversion mixer Reply #16 - Mar 6^th, 2008, 10:47am Hii, In a gilbert mixer The LO transistor should be biased in triode or saturation and why? Thanks
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udaykumarchintala Junior Member Offline Posts: 22 ahmedabad	Re: cmos down conversion mixer Reply #17 - Mar 31^st, 2008, 1:10pm Hii, In my mixer circuit in the LO ,I have used a pulse source and its peak amplitude is 250mV and source resistance is 100 ohm...so how to claculate the LO power in dBm?and what is maximum LO amplitude that can be used in mixers? Thanks....... Uday
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udaykumarchintala

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Re: cmos down conversion mixer
Reply #18 - Apr 7^th, 2008, 10:21am

Hi,
I have designed a folded cascode mixer at 2.4GHz RF and LO is at 2.3GHz,I'm getting 1 dB compression point as 0.56dBm,for calculating IIP3 I have given two tones as 2.401G and 2.4G , while plotting the curves, both the fundamental and third order components are intersecting what could be the problem?I have not designed the matching circuits......will it cause this?

Thanks in advance....

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