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I have question about how to choose vdd and temp in SF and FS (slow-fast and fast-slow) corner in hspice
In case of SS, I choose VDD = 0.9 * VDDnom and temp = 125
In case of FF, I choose VDD = 1.1 * VDDnom and temp = 0
I have a question how to convert a circuit from old technology to new technology.
Let say I have a bandgap design using 250nm technology and want to design to 180nm. How I can do it:
Do I have to design from beginning using 250nm schematic?. Assume both process bandgap take out 1.2v...
Search your model to see they define the same transistor name as your circuit (n105, p105). If it does let try copy your saed32nm.lib to your local working directory and do
.lib 'saed32nm.lib' TT to see if it works
.include 'saed32nm.lib' TT
If you use later cadence version 613 following the steps below:
1/ tar your pdk in cadence working directory
2/ open cadence virtuoso (icfb or virtuoso)
3/ From CIW windows ----> tools -----> Conversion Tool Box -----> CDB to OpenAcess Translator and from this point to path that has your...
Just give 2 equals nmos minimum sizes (length, width) and assign Va a dc voltage. Sweep Vc from 0 to some dc number and plot Id1, Id2.
I expect Id1 is constant since it is in diode connection and Id2 will go from low to high current because you sweep its gate from 0 to some dc number
You should install cadence on scientific linux better than centos. From you log file I can see you install cadence virtuoso 6.1.4 64bits on centos. I did install on ubuntu and centos before and get crashes so many times and I decide to install on scientic linux. It look like you...
Thanks for your suggestion. I already mounted my second hard drive to linux sysem. I have scientific linux install on primary drive and want to have windows os on second one. Do you know how to do it? Someone told me I can disconnect linux hard drive and install windows on second one...
I want to mount a secodary hard drive in scientific linux:
This is information of hard drive when i type fdisk -l
Disk /dev/sdc: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical)...
Hi BradtheRad and dick_freebird
Thanks for your comment. You are all correct, the large resistor value make comparator got incorrect result. I change to small register and adding the cap (show in picture) make reference level stable.
I have a question in designing 4 bit flash adc.
How to choose resistor value in resistor ladder? When I change resistor value I see output of compartor has wrong comparation. The strange thing here is if I run compator alone it works well. Does value of resistor ladder affect comparation?
Anyone know how to measure dnl, inl of adc please show me how to do ? From what I know, we ramp up input of adc (slow ramp) in hspice and import result data to matlab to get dnl, inl.
Thanks a lot
You can follow this link to design your opamp
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The previous link help you to design single output first after you have done it , here is differential output with cmfb and...