US 12,425,019 B2
Sensing circuit and sensing method thereof, sensor chip, and display panel
Yukun Huang, Shanghai (CN); Linzhi Wang, Shanghai (CN); Kerui Xi, Shanghai (CN); Baiquan Lin, Shanghai (CN); Zhenyu Jia, Shanghai (CN); Aowen Li, Shanghai (CN); and Haotian Lu, Shanghai (CN)
Assigned to Shanghai Tianma Micro-Electronics Co., Ltd., Shanghai (CN)
Filed by Shanghai Tianma Micro-Electronics Co., Ltd., Shanghai (CN)
Filed on Jul. 12, 2023, as Appl. No. 18/351,282.
Claims priority of application No. 202310403111.6 (CN), filed on Apr. 14, 2023.
Prior Publication US 2023/0361769 A1, Nov. 9, 2023
Int. Cl. H03K 17/56 (2006.01); G01D 11/00 (2006.01)
CPC H03K 17/56 (2013.01) [G01D 11/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A sensing circuit comprising:
a first transistor comprising a channel region, a first gate, and a second gate, wherein the first gate is configured to receive a sensing signal outputted by a sensor;
a first capacitor comprising a first plate electrically connected to the second gate of the first transistor, and a second plate electrically connected to a first fixed potential signal terminal;
a read circuit electrically connected to the first transistor and configured to control the first transistor to output a sensing current to an output terminal of the sensing circuit; and
a bias compensation circuit electrically connected to the first transistor and configured to input a bias voltage into the second gate of the first transistor.