firasgany7
Junior Member level 1
Hi guys,
I have a schematic of OTA amplifier:
I want to know the W and L that were used to design this OTA. I don't have more information other than the ones provided in this picture.
since all transistors are in saturation, I thought about using the saturation current equation to find (W/L) ratio.
by assuming that I know un*Cox and up*Cox. but the problem that I don't know them. but I have the same technology and same cadence version on which this OTA was designed. which means by running an extra circuit, I can deduce what un*Cox and up*Cox are since I know all the parameters for the other circuit.(also by using saturation current equation because I don't known how to find un*Cox and up*Cox from the cadence tool ) and by substituting them in saturation current equation for the first circuit, I can find W/L ratio.
the question is if un*Cox and up*Cox are the same for all simulations used in the same technology?
or there is some other way to find W and L or the ration between them depending on the information in the picture only?
Note: I'm using 28n technology.
thanks
Firas
I have a schematic of OTA amplifier:
I want to know the W and L that were used to design this OTA. I don't have more information other than the ones provided in this picture.
since all transistors are in saturation, I thought about using the saturation current equation to find (W/L) ratio.
by assuming that I know un*Cox and up*Cox. but the problem that I don't know them. but I have the same technology and same cadence version on which this OTA was designed. which means by running an extra circuit, I can deduce what un*Cox and up*Cox are since I know all the parameters for the other circuit.(also by using saturation current equation because I don't known how to find un*Cox and up*Cox from the cadence tool ) and by substituting them in saturation current equation for the first circuit, I can find W/L ratio.
the question is if un*Cox and up*Cox are the same for all simulations used in the same technology?
or there is some other way to find W and L or the ration between them depending on the information in the picture only?
Note: I'm using 28n technology.
thanks
Firas