US 12,298,331 B2
Power detection circuit
Chia-Chen Kuo, Hsinchu (TW); Chiting Cheng, Taichung (TW); Wei-jer Hsieh, Hsinchu (TW); and Yangsyu Lin, New Taipei (TW)
Assigned to Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu (TW)
Filed by Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu (TW)
Filed on Feb. 26, 2024, as Appl. No. 18/587,508.
Application 18/587,508 is a continuation of application No. 18/178,900, filed on Mar. 6, 2023, granted, now 11,913,980.
Application 18/178,900 is a continuation of application No. 16/935,608, filed on Jul. 22, 2020, granted, now 11,598,794.
Prior Publication US 2024/0201232 A1, Jun. 20, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H02H 9/00 (2006.01); G01R 19/165 (2006.01); H02H 1/00 (2006.01); H02H 9/02 (2006.01)
CPC G01R 19/16519 (2013.01) [G01R 19/16538 (2013.01); H02H 1/0007 (2013.01); H02H 9/02 (2013.01)] 20 Claims
OG exemplary drawing
 
2. A device comprising a power detection circuit, wherein the power detection circuit comprises:
a comparator circuit operative to determine a status of an input power, wherein the comparator circuit being operative to determine the status of an input power comprises the comparator circuit being operative to:
determine power to be on when a voltage level of the input power is greater than a first threshold level, and
determining the power to be off when the voltage level of the input power is subsequently lower than a second threshold level;
a current limiting circuit connected to the comparator circuit and operative to limit a leakage current of the comparator circuit; and
a feedback circuit connected to the comparator circuit and operative to control the first predetermined threshold and the second predetermined threshold, wherein the current limiting circuit is connected in parallel to the feedback circuit.