US 11,722,136 B2
Sensor systems, switched-mode power supply, and electronic devices
Matthias Brandl, Munich (DE)
Assigned to Infineon Technologies AG, Neubiberg (DE)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on Sep. 17, 2020, as Appl. No. 17/23,933.
Claims priority of application No. 19199538 (EP), filed on Sep. 25, 2019.
Prior Publication US 2021/0091652 A1, Mar. 25, 2021
Int. Cl. H03K 17/945 (2006.01); G01S 7/02 (2006.01); G01S 13/02 (2006.01); H02M 3/335 (2006.01)
CPC H03K 17/945 (2013.01) [G01S 7/02 (2013.01); G01S 13/02 (2013.01); H02M 3/335 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A sensor system comprising:
a sensor operative to measure a physical quantity;
a capacitive device for storing electrical energy, the capacitive device being coupled to the sensor;
a power supply input operative to receive power from a switched-mode power supply;
a switch circuit operative to selectively connect the capacitive device to the power supply input;
a control circuit operative to control the switch circuit to:
connect the capacitive device to the power supply input to charge the capacitive device during a first condition in which the sensor is not measuring the physical quantity; and
disconnect the capacitive device from the power supply input to exclusively power the sensor by a voltage supplied by the capacitive device during a second condition in which the sensor is measuring the physical quantity; and
wherein the control circuit is operative to receive a status signal indicating the second condition in which the sensor is measuring the physical quantity, and wherein the control circuit is operative to control the switch circuit based on the received status signal.