Hi All,

I am a student of VLSI and new to Analog Design.

I have recently come across a methodology called the gm/id methodology which is claimed to be used for short channels.

I am interested to learn this methodology and is looking for guidance in this regard.

Thanks a lot in advance...
Vinay

gm/id methodology is just a way of characterizing your device. So gm/Id is basically an Efficiency measurement for a certain device and can be used as a quick way to obtain various parameters that can be used in design of Op-Amps as mentioned by the poster above. gm/Id in a way can be used as a figure of merit for your device, though this will only take care of parameters like gain etc. Since in Analog design (and Digital), Gain trades with bandwidth, we need to be able to characterize the frequency at which our device will still work as an amplifier and not attenuator, so this requires another type of FOM (figure of Merit) that considers both gm/Id and frequency. Analog design is very interesting and if you really have a passion for it, the sky is the LIMIT.

Have any of you checked out the book on gm/id methodology by Paul Jespers?  It's available on amazon.... I'm wondering if it's worth picking up.

hi Rob,

download the course reader, from the handout link on left,

here is it,

https://ccnet.stanford.edu/cgi-bin/course.cgi?cc=ee214b&action=handout_menu

k.praveen