I am interested in these questions, please help me.
in the design the resonant frequency is 93kHz. In the circuit, if you calculate the resonant frequency of the parallel resonant circuit, you get 1Mhz. Since C74,C74 is much larger than C91-C96, it can be neglected. We obtain:
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application note states that 93khz is the optimal operating series resonance frequency and not the one used in the design.