Patent ID: 11955818
Assignee: ELECTDIS AB
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 20:
21. A power receive device, arrangeable in a wireless power transfer system to receive power over an inductive wireless power transfer interface operating at a transmit frequency, fix, from a power transmit device, the wireless power transfer system being of a type which is adapted to transfer information at half duplex using Frequency Shift Keying, FSK, in one direction and Amplitude Shift Keying, ASK, in the other direction, wherein the power receive device comprises a receive controller operatively connected to a power receive circuitry, and wherein the power receive device is configured to cause the power receive circuitry to:
receive, at the transmit frequency, fix, power from the transmit device, and during the receiving,
receive, at the transmit frequency, fTX, using one of two modulation types being FSK or ASK, a first data packet and, during the receiving of the first data packet and if a signaling condition is determined to be fulfilled,
transmit, at the transmit frequency, fTX, operational information using the other of said modulation types.