US 11,842,424 B2
Image sensing device and operating method thereof
Jeong Eun Song, Gyeonggi-do (KR); Yu Jin Park, Gyeonggi-do (KR); and Min Seok Shin, Gyeonggi-do (KR)
Assigned to SK hynix Inc., Gyeonggi-do (KR)
Filed by SK hynix Inc., Gyeonggi-do (KR)
Filed on Oct. 22, 2020, as Appl. No. 17/077,695.
Claims priority of application No. 10-2020-0058462 (KR), filed on May 15, 2020.
Prior Publication US 2021/0358077 A1, Nov. 18, 2021
Int. Cl. G06T 1/60 (2006.01); G06T 1/20 (2006.01); G11C 7/10 (2006.01); G11C 27/02 (2006.01); G11C 5/14 (2006.01); G01B 11/02 (2006.01); G01S 17/00 (2020.01); G01S 7/481 (2006.01); G01S 7/484 (2006.01)
CPC G06T 1/60 (2013.01) [G01B 11/022 (2013.01); G01S 17/00 (2013.01); G06T 1/20 (2013.01); G11C 5/147 (2013.01); G11C 7/106 (2013.01); G11C 7/1057 (2013.01); G11C 27/028 (2013.01); G01S 7/484 (2013.01); G01S 7/4816 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An image sensing device comprising:
a plurality of current cells whose total number to be used is adjusted based on a plurality of enable signals, and which are sequentially controlled based on a reset signal and a plurality of selection signals;
a current-voltage conversion circuit suitable for converting a plurality of unit currents, which are supplied from current cells used among the plurality of current cells, into a ramp signal; and
a first control circuit suitable for generating the plurality of enable signals based on a maximum conversion code value corresponding to a slope of the ramp signal.