Calculating current flow and voltages at Mosfet

[lcs81]

The voltages at Mosfet

For two series connected Nmos, i have apply a Vdd at M2. Please refer to attachment(voltage.jpg).

I am intrested to know the current flow. How to make such calculation?

Other know value is gate voltage of M2 and gate voltage of M3.

Since the Vds2 is Vd2-Vs2 and Vds3=Vd3-vs3, now i dont know what is Vd3 and Vs2, how to calculat this ? cause i need to know the operating mode of M2 and M3...



Thanks

 

[Chethan]

Re: The voltages at Mosfet

refer to page no 54 and 55 in razavi book. There are a set of equations to be solved to get the voltage at drain of M3.

 

[lcs81]

Re: The voltages at Mosfet

May i know exactly the book name?

Or mind to type the equation here?

Thanks

 

[sabu]

The voltages at Mosfet

u can refer analog ckt design by razzavi
regards
sabu

 

[eda_freak]

Re: The voltages at Mosfet

pls post the circuits as pdfs as the rest of ppl. do.... jpgs are not viewable...

 

[ME]

Re: The voltages at Mosfet

pls post the circuits as pdfs as the rest of ppl. do.... jpgs are not viewable...

I think there's something wrong with your PC settings, I have no problem watching the JPG schematic in the first post.

 

[Chethan]

Re: The voltages at Mosfet

May i know exactly the book name?

Or mind to type the equation here?

Thanks

Attaching three pages from razavi book which deals with your circuit. If you want you can download the book from the eda books upload / download forum.