lhlbluesky_lhl
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in most active BPF design procedure, the opamp is assumed to be ideal; however, the actual opamp is non-ideal, first-order or second-order, finite DC gain, finite GBW, etc. i want to know, for a BPF design, how to consider the non-ideal characteristic of opamp? such as, what is the influence of dominant pole, GBW of opamp?how to decide the design parameter of opamp?
besides, i had seen a special BPF before, its center frequency can be adjusted only by a external resistor Ro: Ro=8855/f0(khz)-13 what is the possible structure of this BPF? can anyone give me some advice?
thanks.
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