[/quote]carter tsang said:................
and this simulated inductor is usually for grounded inductor, does anyone have some examples of the simulated inductor which is used for floating inductor?because the inductor in the buck converter is not grounded
carter tsang said:For example, in buck circuit, I do not think the function of simulated ungrounded inductor is the same as the real inductor which is made of coil, and considering the high frequency which will result in influence on the op amp in the simulated inductor, it is impossible to use the simulated inductor in the buck circuit. But my teacher said the real inductor can be undoubtlessly replaced by the simulated inductor.
My first comment wasn't fully correct. In principle, a simulated inductor can replace a real inductor if it is able to operate as an inductor at the respective frequency and can handle the required output voltage....it is impossible to use the simulated inductor in the buck circuit. But my teacher said the real inductor can be undoubtlessly replaced by the simulated inductor.
carter tsang said:are there some methods or articles which introduce the parameters design around the op amp, for example, how to determinate the value of resistors or capacitors around the op amp, or what I should pay attention?
I have some troubles to determine this
Why?but it can only simulate the inductor of high value
carter tsang said:I use the circuit in the papers to establish a simulated grounded inductor, but it can only simulate the inductor of high value, such as 0.1H, if the value is 100uH, it is tough to determine the parameters of resistors and capacitors. I can not get the 100uH simulated inductor.
Why?
I can only get the formula L=c*(R5/R2)*R3*R4, but do not know how to determinate each value in it, so I just let R5=R2=R3=1k or 500 or 10K, and change the value of c and R4 to get the L value that I want . The only simulated inductor I can get is the situation in the image I attach, and the L value is 0.1uH, and it can be in accordance with the U-I relationship of real inductor. But it is tough for me to get 100uH simulated inductor that I want,what I do is to try different values of R and C again and again
carter tsang said:sorry, I do not know how to conduct
ac analysis
The reason why I choose the 12V input voltage is that in the situation where I use the simulated inductor, the value of input voltage is about 10v-(-5v)square wave。 should I change the amplifier?
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