Therefore, parallel resonance occurs at the intersection of the two curves, which is the anti-resonance effect, and this frequency point is the anti-resonance point. Conductance G=jwc2+1/jwL1, without considering the parallel connection of two capacitors with different ESR values, we can obtain the impedance curve:
When capacitors with different capacitance values ​​are connected in parallel, the bottom of the impedance characteristic curve is much flatter than the bottom of the impedance curve (although there is an anti-resonance point, there is an impedance peak), so it can effectively reduce the impedance in a wide frequency range.