Timeline for How to calculate a mixer noise?
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 15, 2023 at 11:32 | vote | accept | Pierre Polovodov | ||
| Feb 14, 2023 at 13:30 | comment | added | Pierre Polovodov | ok, thank you. I do not know how to open a chat. I might have some time but have to live in a while. | |
| Feb 14, 2023 at 13:28 | comment | added | Dan Boschen | (your questions are also more appropriate for the electronics stack exchange site and no longer in the "signal processing" category)---still I can help you if we can get a chat open-- I am trying to do that now) | |
| Feb 14, 2023 at 13:26 | comment | added | Dan Boschen | HI Pierre- We have to avoid long ongoing discussion in the comments section- it flags the moderators since StackExchange wants to keep the comments concise----- If I could figure out how to open a chat room we can go there and chat if you are free now | |
| Feb 14, 2023 at 13:25 | comment | added | Pierre Polovodov | 2') As for you example with -50 dBc/Hz, you show that it is twice as low as input, thus 3 dB below the LO value, is this right? And the IF Phase noise is not considered since it is low, right? IF: 1) As for conversion loss, it is clear,it works as an attenuator with freq shifting. The noise factor is the inverse of an attenuation. 2) As for anti-alias filter, do you mean image frequencies ? As for your example: We can basically use a filter that has good attenuation at 1.7 GHz, right? | |
| Feb 14, 2023 at 13:25 | comment | added | Pierre Polovodov | 2) As for a phase noise. Do you say that we need to convolute two phase noises, and taking into account Leeson equation we should get the worst phase noise on the output? I was trying to convolute $\frac{1} {f-f_1}$ terms, I get however integrals that do not compute (mistake probably?), maybe I should take into account other powers of denominator. | |
| Feb 14, 2023 at 13:24 | comment | added | Pierre Polovodov | LO: 1) First of all I see that since LO is strong, and according to your answer, do you say that the Schottky diode will limit maximum LO value and that the increasing AM amplitude will not change the amplitude of the output signal because of this non-linearity? Are there inverse oriented Schottky diodes in order to limit the decrease of LO? Please let me know if I understood well | |
| Feb 14, 2023 at 13:24 | comment | added | Pierre Polovodov | I wanted to thank you for your detailed answer. Just to say, I am interested in a statistics explanation, that is taking into account input noises (Amplitude, phase, white noise, and whatever that is important to properly account for the output noise), could you please advice a reference on this topic? Anyway, I just wanted to ask you some questions and precision on your answer. | |
| Feb 2, 2023 at 18:10 | history | answered | Dan Boschen | CC BY-SA 4.0 |