Designer’s Guide Community

‹ Previous topic | Next topic ›

Pages: 1

How to plot gmn+gmp in cadence using calculator? (Read 4952 times)

Larry_80

Community Member

Offline

Posts: 61

How to plot gmn+gmp in cadence using calculator?
May 3^rd, 2012, 5:57pm

So i am trying to plot gmn (transconductance of NMOS) + gmp (transconductance of PMOS) vs Vin. I was able to save gmn and gmp for eacd DC operating points, then i plot the result of gmn and gmp. But when i try to use the calculator to plot expression (gmn + gmp), the calculator seems unable to evaluate it. I am not sure if i am doing this correctly?

« Last Edit: May 03^rd, 2012, 10:24pm by Larry_80 »

IP Logged

boe Community Fellow Offline Posts: 615	Re: How to plot gmn+gmp in cadence using calculator? Reply #1 - May 4^th, 2012, 4:05am Larry_80, Did you use the same values for Vin? - B O E
Back to top	IP Logged

raja.cedt Senior Fellow Offline Posts: 1516 Germany	Re: How to plot gmn+gmp in cadence using calculator? Reply #2 - May 4^th, 2012, 5:28am hello, sorry to ask you, can you please tell me how to plot gm in cadence (i can chech in the operating point but i would like to plot vs some variable ) Thanks, raj.
Back to top	IP Logged

sheldon

Community Fellow

Offline

Posts: 751

Re: How to plot gmn+gmp in cadence using calculator?
Reply #3 - May 5^th, 2012, 9:03am

Raja,

�Try opening the Results Browser, then selecting dcOpInfo
for the desired device select the dc operating point parameter
you would like and send it to the Calculator. Repeat for the
opposite polarity device.

Example:
Results Browser: dcOpInfo --> NM0 --> gm, see selectgm.tif

Also attached is an example of the plotting the sum of a pch and
nch gm, see plots.tif

�Sheldon

plots.tif

IP Logged

sheldon Community Fellow Offline Posts: 751	Re: How to plot gmn+gmp in cadence using calculator? Reply #4 - May 5^th, 2012, 9:06am Using the Results Browser
Back to top	selectgm.tif IP Logged

Pages: 1

‹ Previous topic | Next topic ›