US 11,984,906 B2
Batteryless wireless sensor device
Phuong Huynh, Fairfax, VA (US)
Assigned to SIGMASENSE, LLC., Austin, TX (US)
Filed by SIGMASENSE, LLC., Wilmington, DE (US)
Filed on Nov. 30, 2022, as Appl. No. 18/071,822.
Application 18/071,822 is a continuation of application No. 17/512,867, filed on Oct. 28, 2021, granted, now 11,545,993.
Application 17/512,867 is a continuation of application No. 17/249,280, filed on Feb. 25, 2021, granted, now 11,374,587, issued on Jun. 28, 2022.
Prior Publication US 2023/0113692 A1, Apr. 13, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 50/20 (2016.01); H02J 50/00 (2016.01); H03M 1/46 (2006.01); H04B 5/00 (2006.01); H04B 5/02 (2006.01)
CPC H03M 1/46 (2013.01) [H02J 50/001 (2020.01); H02J 50/20 (2016.02); H04B 5/0037 (2013.01); H04B 5/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A batteryless wireless sensor device comprising:
an analog to digital converter (ADC); and
a sensor, wherein the batteryless wireless sensor device is configured to:
power up and operate the ADC and the sensor based on a DC signal that is based on energy of a radio frequency (RF) signal;
generate sensor data that is based on a sensor voltage of the sensor that corresponds to a physical condition to which the sensor is exposed, wherein the sensor data is output from the ADC based on digital sampling of the sensor voltage of the sensor by the ADC, wherein the ADC is coupled to the sensor via a single line, and wherein the sensor voltage is based on charging of a capacitor of the ADC by a sensor current of the sensor and a digital to analog converter (DAC) output current from the ADC; and
transmit the sensor data to an RF transceiver that is configured to provide the sensor data to at least one other device.