manodipan wrote on Jun 29^th, 2009, 5:54am:
MATLAB is different from Simulink.
Do you truely intend to mean MATLAB without Simulink ?
Or do you intend to model an integrator by M-file as S-Function block of Simulink ?

What type of non-ideality for SC integrator do you want to model ?

manodipan wrote on Jul 1^st, 2009, 12:25am:
Not correct.
Simulink is another product although it requires MATLAB and works on MATLAB.
http://www.mathworks.com/products/product_listing/index.html

Modeling methdologies and their simulations are completely different between MATLAB and Simulink.
If you use S-Function block of Simulink written by M-file, you can make use of some MATLAB modeling efforts in Simulink.

Maybe I think you want to use Simulink not MATLAB for modeling SC integrators.
Is this correct ?

The followings are general notes.
- Use correct terminologies.
- Warnigns are different from Errors.
- ADS is not name of simulator.
- There is no tool which name is Cadence.
- MATLAB are different from Simulink.
- There are many vendor's simulators which have analyses called as PSS, Pnoise and PAC,etc.

manodipan wrote on Jul 1^st, 2009, 12:25am:
If your interest is only this, this is just z-domain transfer function realization.
Use delay and feedback with gain block.
http://www.designers-guide.org/Forum/YaBB.pl?num=1206966312

manodipan wrote on Jul 1^st, 2009, 12:25am:

In physical integrator, an input is current and an output is voltage generally.
However models of Simulink are no more than signal flow system not energy conservative system which have flow and potential,
although Simulink have continuous time solver as well as discrete time solver.
There is no concept of voltage and current in Simulink.
Do you understand signal flow simulator ?

We can model behaviors of voltage and current in capacitors even in Simulink which is signal flow simulator inherently,
however I think simulations based on Verilog-A(AMS) are suitable for your purpose.

http://www.designers-guide.org/Forum/YaBB.pl?num=1238242506/7#7

If you have following Blocksets for Simulink, it will be easy to do physical modeling.
http://www.mathworks.com/products/simelectronics/
http://www.mathworks.com/products/simpower/

I don't have these Blocksets because I don't feel needs for them.