US 12,480,979 B2
Current detection circuit and electronic device
Dongming Liu, Foshan (CN); and Xiaoliang Tan, Foshan (CN)
Assigned to Halo Microelectronics Co., Ltd., Foshan (CN)
Filed by Halo Microelectronics Co., Ltd, Foshan (CN)
Filed on Oct. 2, 2023, as Appl. No. 18/375,935.
Claims priority of application No. 202310644243.8 (CN), filed on Jun. 2, 2023.
Prior Publication US 2024/0402222 A1, Dec. 5, 2024
Int. Cl. G01R 19/10 (2006.01); G01R 35/00 (2006.01)
CPC G01R 19/10 (2013.01) [G01R 35/005 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A current detection circuit comprising:
a signal input terminal, a signal output terminal, a switch branch, a first current detection branch, and a second current detection branch, wherein:
the switch branch and the first current detection branch are connected between the signal input terminal and the signal output terminal;
the second current detection branch is connected to the signal input terminal and the first current detection branch; and
the switch branch is configured to block the current flowing from the signal output terminal to the signal input terminal when the switch branch is turned off, and wherein:
when the switch branch is conducting, the current flowing from the signal input terminal through the switch branch to the signal output terminal is a switch branch current comprising a first current linearly related to a first voltage difference and a second current exponentially related to the first voltage difference, and wherein:
the first voltage difference is a voltage difference across the signal input terminal and the signal output terminal;
the first current detection branch is configured to output a first detection current representing the first current; and
the second current detection branch is configured to output a second detection current representing the second current.