What does circuit optimization refer to?

when optimization term is used in simulation, what it refers to ? Can give an example, what instructions are used,

Re: Circuit optimization

Hi Dear STOIKOV!

I am not sure I understood your question, I am afraid. But I suppose you want to know what optimization means and how it is done.

I give you an example: Consider a simple RLC circuit applied as a filter. You want to have a proper response, so that the frequency response have a sharp peak and at the same time, the time response is not oscillating. You have to do a trade off, you choose the resistance and capacitance for example, as the changable variables and start to optimize the circuit. You define some limitations (Some Goals) to achive and try to obtain this goals bu changing the amount of variables. If you succeeded, you have optimized the circuit. So you see in optimization, basically you need a goal and some variables to change. There are special algorithms which are used to optimize a system to get desired situation by changing some variables. So during an optimization you need to define the variables and goals, the simulator will deal with rest.

Thanks!

Circuit optimization

i agree optimization is a relative term directly linked to the main goals of the project. There is usually a tradeoff somewhere.

Re: Circuit optimization

Yes what I'm asking about optimization is related with the goals to get in a design and also how to perform an optimization in a spice simulator. I saw that there are some menus about it in TSpice and am going to read something about it. But still wonder if there are an special instruction to do it. Thanks.

Re: Circuit optimization

Ahh, thank you for clarifying what you meant, I have only seen that using Sspice to do filter designs using nullator/norator analysis, i will have to look into it and see if i can get back to you.

Re: Circuit optimization

When I do the circuit optimization, I've used the Newton-Robson's algorithm.