How to use .param and .tran simulation in LtSpice?
Please show its use in this question-
Use SPICE to plot the output characteristic for NMOS transistors with
different Length's (constant W/L). For each curve, use the waveform viewer
to plot the small-signal output resistance, r0, hence verify the theoretical
dependence of trans-conductance on Length that you have studied in
class. Use minimum feature size of 0.18¦Ìm.
This is a homework assignment, right?
Let me ask you this: Did you go to college to learn how to do those
things yourself, so that you can become a good engineer, or are you
looking for free handouts so you never need to do the work yourself?
If the latter, you should be shamed into failing the assignment.
Show us what YOU have done so far on this problem. You should have
figured out most of it already.
This is a forum where people help others who first make an attempt to
do their work but run into something that doesn't work right. It is
not where answers to homework assignments are handed out to losers who
cannot be bothered to try. Are you one of those?
One of the first pieces of advice I give many people about using
LTspice, is to use it like they would if they had real parts on the
bench. Let's say someone handed you some NMOS transistors and you had
access to power supplies and DVMs and oscilloscopes. What would you
do with them to characterize the transistors? Start by making LTspice
do the same things.
Andy
