Electronics > Beginners
Measuring transconductance of any circuit
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
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version