Controlling the magnetic state of inductor cores (H03J7/06 takes precedence)

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Automatic frequency control; Automatic scanning over a band of frequencies > Automatic frequency control (H03J7/18 takes precedence) > where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant > Controlling the magnetic state of inductor cores (H03J7/06 takes precedence)