| Electronics > Beginners |
| Help in deriving Zin small-signal expression |
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| promach:
Let me try deriving Rout2 on my own then. Besides, I have attached a book chapter (which you can also find in public domain without any paywall) detailing the lossy characteristics of the gyrator, leading to explanation on ESR and parallel resistance of the active inductor. |
| promach:
In order to determine suitable transistor size, I need to determine the Rout2 equation with respect to ro of each mosfets. Gate of mosfet M6 is not driven and connected to GND during Rout2 small-signal calculation. But generally, how many nodal equations do I need since voltage at source node of M6 is not known to me at the moment ? |
| The Electrician:
--- Quote from: promach on May 20, 2018, 03:58:14 am ---In order to determine suitable transistor size, I need to determine the Rout2 equation with respect to ro of each mosfets. Gate of mosfet M6 is not driven and connected to GND during Rout2 small-signal calculation. But generally, how many nodal equations do I need since voltage at source node of M6 is not known to me at the moment ? --- End quote --- In the image in response #16 above it looks like M5 is the one with the grounded gate. Is that the model you will be using? |
| promach:
--- Quote ---M5 is the one with the grounded gate --- End quote --- I suppose gate of M5 has to be connected to AC ground ? |
| The Electrician:
--- Quote from: promach on May 21, 2018, 12:22:44 am --- --- Quote ---M5 is the one with the grounded gate --- End quote --- I suppose gate of M5 has to be connected to AC ground ? --- End quote --- I don't know if it "has to be" connected to AC ground, but isn't that what is shown in the image in response #16? Which model do you want to use for your analysis? |
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