Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Yibin,
I think you are right. Using standard proecss you cannot get high performance imager, especially with 0.18um or less.
By the way, do you know any job opportunities in CMOS image sensor design? I'll appreciate your information.
Thanks in advance!
global
Of course you can use standard CMOS process to do imager sensor. However, optimized process gives you better performance.
I have done several chips of CMOS image senosr using standard tsmc process. All work successfully. By the way, are you still interested in working on this topic?
channel length modulation vth
if you open a model file from MOSIS test results, you will see Vth depends on transisotor size. It's just not included in our simple hand calculation model.
I'm interested too.
I normally simulate the digital part seperated using synopsis.
You can use ideal digital model from ahdl library to speed up the mixed-signal simu.
However, I guess there are better solutions.
nor pmos nmos
I think it depends on
1. the load. you need large mos to drive large cap load. if load is minimum, you can use minimum mos.
2. the drive capability of your previous stage. it should be able to drive this gate as a load at a given speed. be careful that your previous stage may...
we have two fists, analog and digital.
both of them are necessary in fighting.
it is meaning less to discuss if analog will 'die'.
the only difference is if the demand of analog designers is larger or smaller than the schools can provide.
Re: offset cancellation
I think it mainly depends on your opamp operates continuously or clocked.
If it's clocked, you can used switch-cap feedback to cancel the offset successfully.
It it's continuous, it is much harder. Following are some methods I can think of,
1. better matching in layout...
yes. 2.5v is the standard and suggested voltage.
however, you may choose multiple power supplies for different parts of your circuits - for lowering down the total power, or get some flexibility.
Normally you can use from 2.5v-Vth to 2.5v+Vth.
I've tried this in 3.3v process and looks like it...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
