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https://designers-guide.org/forum/YaBB.pl Simulators >> Circuit Simulators >> Transimpedance Ampifier - Input Referred Noise Current Density https://designers-guide.org/forum/YaBB.pl?num=1517356961 Message started by repah on Jan 30th, 2018, 4:02pm |
Title: Transimpedance Ampifier - Input Referred Noise Current Density Post by repah on Jan 30th, 2018, 4:02pm Hello, I am designing a TIA in Cadence, input is current (an idc component), output is voltage (a capacitive load) I want the input referred noise current density in RMS. I do a noise analysis. In the noise analysis, I select the input as my input current, and the output as my output voltage node, referenced to ground. I run the noise analysis. When I go to Print->Noise Summary, I select the bandwidth to be 1Hz to my 3dB Frequency of my TIA. Then, I get the total input referred noise as a number. I select "V" as my unit. Is this the Input Referred Noise Current Density in RMS ? I want to eventually get the average input referred noise current density when I divide this RMS value generated by Cadence by the square root of the 3db frequency of my TIA. Is this correct, or should I do this in S Parameter analysis ? Also, not sure if I should run my noise simulation up to the 3dB bandwidth of the TIA or 2X the 3dB Bandwidth as some have suggested. I ran it to my 3dB Bandwidth. Thanks. |
Title: Re: Transimpedance Ampifier - Input Referred Noise Current Density Post by Andrew Beckett on Feb 1st, 2018, 9:15am The same question was asked and answered on the Cadence Community Forums |
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