US 12,356,098 B2
Pixel designs with reduced LOFIC reset and settling times
Zhe Gao, San Jose, CA (US); Chengcheng Xu, Santa Clara, CA (US); Dennis Tunglin Lee, San Jose, CA (US); and Tiejun Dai, Santa Clara, CA (US)
Assigned to OMNIVISION TECHNOLOGIES, INC., Santa Clara, CA (US)
Filed by OMNIVISION TECHNOLOGIES, INC., Santa Clara, CA (US)
Filed on Jun. 24, 2022, as Appl. No. 17/849,403.
Prior Publication US 2023/0421922 A1, Dec. 28, 2023
Int. Cl. H04N 25/75 (2023.01); H04N 25/59 (2023.01); H10F 39/00 (2025.01); H10F 39/18 (2025.01)
CPC H04N 25/75 (2023.01) [H04N 25/59 (2023.01); H10F 39/18 (2025.01); H10F 39/8037 (2025.01)] 37 Claims
OG exemplary drawing
 
1. A pixel cell, comprising:
a photosensor configured to photogenerate image charge in response to incident light;
a floating diffusion (FD) to receive the image charge from the photosensor;
a transfer (TX) transistor coupled between the FD and the photosensor to transfer the image charge to the FD;
a first reset (RST1) transistor coupled between the FD and a voltage supply;
a capacitor having two ends, a first end of the capacitor coupled to the FD; and
a second reset (RST2) transistor coupled between a second end of the capacitor and the voltage supply.