US 12,013,421 B2
Electronic circuit and sensor system
Tatsuo Nakagawa, Tokyo (JP); Akeo Satoh, Ibaraki (JP); and Akira Kotabe, Ibaraki (JP)
Assigned to HITACHI ASTEMO, LTD., Ibaraki (JP)
Appl. No. 17/285,403
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed Oct. 11, 2019, PCT No. PCT/JP2019/040271
§ 371(c)(1), (2) Date Nov. 15, 2021,
PCT Pub. No. WO2020/080304, PCT Pub. Date Apr. 23, 2020.
Claims priority of application No. 2018-195830 (JP), filed on Oct. 17, 2018.
Prior Publication US 2022/0107345 A1, Apr. 7, 2022
Int. Cl. G01R 19/165 (2006.01)
CPC G01R 19/16576 (2013.01) 13 Claims
OG exemplary drawing
 
1. An electronic circuit comprising:
a first element that is connected to a power supply and configured to generate an output signal;
a switch, wherein a withstand voltage of the first element is lower than a withstand voltage of the switch;
an output terminal, wherein the first element is connected to the output terminal via the switch;
a backflow prevention element configured to prevent a current from entering the power supply from the output terminal when a voltage higher than the voltage of the power supply is applied to the output terminal, and
a voltage monitor circuit configured to:
monitor a voltage applied to the output terminal,
measure a voltage of the power supply, and
control the switch so as to disconnect the first element and the output terminal when the voltage applied to the output terminal is equal to or higher than a predetermined value, wherein the predetermined value is higher than the voltage of the power supply.