I designed a band-pass filter. I set the center frequency to 90 MHz. When I do an AC analysis, I see the filter graph I want, but the transient analysis results are not what I wanted.
I'm giving a single signal pulse to the input and I want to see that at the output, but the signal is distorted due to the filter.
I want to do good filtering without distorting the input signal.
What should I change in the circuit? What should I add?
I am sharing 2 filters that I have made with you.
The results of the filter circuit below are shown in the graphs. The frequency response of this filter is as I want it, but the results are very bad in the transient analysis. It distorts the input signal pulse.
Circuit:
Frequency response graph:
Filter input pulse:
Filter output pulse:
Now let's move on to the other filter circuit with a good transient result graph.
This filter circuit and its results are shown below.
Circuit:
Frequency response graph (this graph is not suitable.)
Filter input pulse:
The pulse I get at the comparator output (the results I want should be roughly like this.)