Transmit coil selection responsive to average peak to peak measurement voltage potentials and related apparatuses and method

An apparatus, comprising:

• a tank circuit comprising a transmit capacitor and selectively comprising a respective one of a plurality of transmit coils connected to the transmit capacitor;
• and
• a controller to select one of the plurality of transmit coils to use to transmit wireless power responsive to determining whether or not one or more of a receive coil or foreign object is proximate to the plurality of transmit coils responsive to a comparison of one or more predetermined threshold values with a lowest average of peak-to-peak amplitude differences in measurement voltage potentials for the respective plurality of transmit coils.

A method, comprising:

• receiving a measurement voltage potential responsive to a tank circuit signal at a tank circuit, the tank circuit selectively including a respective one of a plurality of transmit coils;
• and
• selecting a transmit coil of the plurality of transmit coils to transmit wireless power to a receive coil of a wireless power receiver responsive to determining whether or not one or more of a receive coil or foreign object is proximate to the plurality of transmit coils responsive to a comparison of one or more predetermined threshold values with a lowest average of peak-to-peak amplitude differences in measurement voltage potentials for the respective plurality of transmit coils.