Arthur Witulski, Adan Hernandez, and Robert Erickson, "Small-Signal Equivalent Circuit Modeling of Resonant Converters," IEEE Transactions on Power Electronics, January 1991. Series, parallel, and LCC ...

Crystal parameters are important because crystals have a series resonance and a parallel resonance and they are not at the same frequency. You also may need to know how much loading capacitance ...

There’s also a shunt or parallel capacitor. When you order a crystal, you specify if you want the resonant frequency in series or parallel mode — that is, which of the capacitors in the model ...