US 11,942,793 B2
Wireless power transfer with in-line sensing and control based on detection of chargeable device
John Christopher Price, Austin, TX (US); Daniel Keith Van Ostrand, Leander, TX (US); and Phuong Huynh, Fairfax, VA (US)
Assigned to SIGMASENSE, LLC., Austin, TX (US)
Filed by SIGMASENSE, LLC., Wilmington, DE (US)
Filed on Oct. 19, 2021, as Appl. No. 17/505,172.
Application 17/505,172 is a continuation of application No. 16/936,593, filed on Jul. 23, 2020, granted, now 11,183,883.
Application 16/936,593 is a continuation of application No. 16/428,131, filed on May 31, 2019, granted, now 10,756,578, issued on Aug. 25, 2020.
Prior Publication US 2022/0037929 A1, Feb. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 50/12 (2016.01); G05B 19/042 (2006.01); H02J 50/80 (2016.01)
CPC H02J 50/12 (2016.02) [G05B 19/042 (2013.01); H02J 50/80 (2016.02); G05B 2219/2639 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device that is operative to transfer power wirelessly, the device comprising:
a drive-sense circuit (DSC) operably coupled to receive a reference signal and to generate a drive signal based on the reference signal, wherein, when enabled, the DSC operably coupled and configured to:
provide the drive signal to a first coil via a single line and via a resonating capacitor and simultaneously to sense the drive signal via the single line, wherein the first coil is implemented to transfer power wirelessly to a second coil of another device, wherein sensing of the drive signal via the single line includes detection of one or more electrical characteristics of the drive signal; and
generate a digital signal representative of the one or more electrical characteristics of the drive signal based on an error signal corresponding to a difference between the drive signal and the reference signal, wherein the one or more electrical characteristics of the drive signal includes information regarding whether the another device is within proximity to the device and is suitable for receiving power wirelessly from the device.