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 ...

A [circuit digest] post that continues a series on oscillators has a good, practical treatment of the subject. Crystals are made to have a natural resonant frequency and will oscillate at that ...

The device works using a very low-impedance resonant circuit and a very high-impedance voltmeter. It measures the ratio of the voltage across the known circuit and the unknown circuit. This ...