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sample-and-hold circuit simulation using MATLAB code
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euniceliu



Joined: 26 Nov 2008
Posts: 8
Post04 Nov 2009 17:31   

sample-and-hold circuit simulation using MATLAB code
I have no idea how to implement the simulation of a sample-and-hold circuit. The model is as basic as "Vo(t) = Vi(t) + RC*dVo(t)/dt", where C is constant and R is a nonlinear function of Vo(t). If I use a sine wave as the input signal, Vi(t), then how can I get Vo(t)?

Since Vo(t) is also a nonlinear function of Vi(t), I'm considering to let R be the nonlinear function of Vi(t). Assume the nonlinear order is 2, then R approaches to a0+a1*Vi(t)+a2*Vi(t)^2 where a0, a1 and a2 are coefficients. In this case, the derivative of Vo(t) is related with the previous and post samples at sample time t. I'm wondering how to derive the solution to Vo(t).

Any inputs or suggestions are welcome! Thank you very much in advance!
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Communications_Engineer



Joined: 10 Oct 2008
Posts: 492
Helped: 39
Post05 Nov 2009 8:16   

sample-and-hold circuit simulation using MATLAB code
Why dont you use simulink? It has a block for sample and hold
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Post05 Nov 2009 8:16   

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euniceliu



Joined: 26 Nov 2008
Posts: 8
Post05 Nov 2009 14:26   

Re: sample-and-hold circuit simulation using MATLAB code
I have to use Matlab code or C code, rather than simulink.
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