US 12,298,344 B2
Leakage current detection circuit
Jong Seok Jung, Icheon-si (KR); Chan Keun Kwon, Icheon-si (KR); Kyeong Hwan Park, Icheon-si (KR); Young Kwan Lee, Icheon-si (KR); and Suk Hwan Choi, Icheon-si (KR)
Assigned to SK hynix Inc., Icheon-si (KR)
Filed by SK hynix Inc., Icheon-si (KR)
Filed on Mar. 1, 2023, as Appl. No. 18/116,090.
Claims priority of application No. 10-2022-0131579 (KR), filed on Oct. 13, 2022.
Prior Publication US 2024/0125848 A1, Apr. 18, 2024
Int. Cl. G01R 31/30 (2006.01); G01R 19/00 (2006.01)
CPC G01R 31/3008 (2013.01) [G01R 19/0092 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A leakage current detection circuit comprising:
a mirror circuit configured to copy a leakage current flowing through a node and generate a copy current in a copy node;
an oscillation circuit configured to generate an oscillation signal based on the copy current; and
a calculation circuit configured to count a reference clock in response to the oscillation signal and calculate an amount of the leakage current based on a count value of the reference clock,
wherein the oscillation circuit includes:
a charge storage unit being connected to the copy node and configured to be charged with the copy current;
a discharge unit configured to discharge the charge storage unit in response to the oscillation signal; and
an oscillation signal output circuit configured to generate the oscillation signal by comparing a voltage of the copy node, which is changed by charging and discharging of the charge storage unit, with a first comparison voltage.