US 12,360,138 B2
Voltage detection device and method for preventing system failure
Wei-Ping Wang, Taiwan (CN)
Assigned to SIGMASTAR TECHNOLOGY LTD., Fujian (CN)
Filed by SigmaStar Technology Ltd., Fujian (CN)
Filed on Oct. 16, 2023, as Appl. No. 18/487,210.
Claims priority of application No. 202211358706.6 (CN), filed on Nov. 1, 2022.
Prior Publication US 2024/0142498 A1, May 2, 2024
Int. Cl. G01R 19/00 (2006.01)
CPC G01R 19/0038 (2013.01) 10 Claims
OG exemplary drawing
 
1. A voltage detection device, comprising:
a reference voltage latch circuit, outputting one of first and second sets of reference voltages as a third set of reference voltages according to a selection signal, and selectively resetting or continuing outputting the one of the first and second sets of reference voltages as the third set of reference voltages according to a first detection signal, wherein the first set of reference voltages are lower than the second set of reference voltages;
a first voltage detector, generating the first detection signal according to a fourth set of reference voltages and an input voltage, wherein the fourth set of reference voltages are lower than or equal to the first set of reference voltages;
a second voltage detector, generating a second detection signal according to the third set of reference voltages and the input voltage; and
a digital circuit, generating the selection signal according to the second detection signal.