Patent ID: 11936211
Assignee: AIRA, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A wireless charging device, comprising:
a plurality of charging cells provided on a surface of the wireless charging device;
an analog-to-digital converter circuit;
a high-pass filter configured to extract high-frequency components from a signal representative of tank voltage that is measured at a transmitting coil in one of the plurality of charging cells during a charging operation;
a first attenuator coupled to a rectifier, wherein the first attenuator and the rectifier are configured to attenuate the signal representative of tank voltage to obtain an attenuated signal that has a voltage level within a range of voltage levels consistent with voltage limits associated with an input to the analog-to-digital converter circuit;
a mixer configured to superimpose a signal representative of the high-frequency components on the attenuated signal by addition to obtain a scaled measurement signal; and
a demodulator configured to decode one or more messages associated with the charging operation from the scaled measurement signal.