| Electronics > Beginners |
| Measuring transconductance of any circuit |
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| promach:
--- Quote ---No. I am calculating Gm. Certainly Gm has some frequency dependence...you can factor that in when you pick the sine frequency. --- End quote --- Sorry, I still do not get why the capacitor is not included in the test circuit ? Ideal Leq using gyrator implementation = CL*s/(Gm1*Gm2) Are you saying that the sine frequency of the current source I1 helps to emulate a capacitor ? |
| Wimberleytech:
--- Quote from: promach on December 16, 2018, 01:52:00 am --- --- Quote ---No. I am calculating Gm. Certainly Gm has some frequency dependence...you can factor that in when you pick the sine frequency. --- End quote --- Sorry, I still do not get why the capacitor is not included in the test circuit ? Ideal Leq using gyrator implementation = CL*s/(Gm1*Gm2) Are you saying that the sine frequency of the current source I1 helps to emulate a capacitor ? --- End quote --- In your equation...is Gm1 a function of the capacitor?? No, the sine is not emulating a capacitor. |
| promach:
--- Quote ---In your equation...is Gm1 a function of the capacitor?? --- End quote --- The answer is no. Gm1 is the overall transconductance of cmos inverter. Gm1 is independent of capacitor. Same applies to Gm2 |
| Wimberleytech:
--- Quote from: promach on December 16, 2018, 02:31:07 am --- --- Quote ---In your equation...is Gm1 a function of the capacitor?? --- End quote --- The answer is no. Gm1 is the overall transconductance of cmos inverter. Gm1 is independent of capacitor. Same applies to Gm2 --- End quote --- Great! We are making progress. That is why my method to calculate Gm has no reactive components. |
| promach:
--- Quote --- That is why my method to calculate Gm has on reactive components. --- End quote --- Investigate the Gm blocks separately as suggested by the forum title itself This is my personal opinion as of now but please bear in mind that I could be wrong as well |
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