US 11,722,803 B2
Ramp signal generator and image sensor including the same
Hyuen Hee Bae, Gyeonggi-do (KR)
Assigned to SK hynix Inc., Gyeonggi-do (KR)
Filed by SK hynix Inc., Gyeonggi-do (KR)
Filed on Jun. 24, 2022, as Appl. No. 17/849,051.
Claims priority of application No. 10-2021-0183738 (KR), filed on Dec. 21, 2021.
Prior Publication US 2023/0199344 A1, Jun. 22, 2023
Int. Cl. H04N 25/71 (2023.01); H04N 25/75 (2023.01); H04N 25/709 (2023.01); H04N 25/772 (2023.01)
CPC H04N 25/75 (2023.01) [H04N 25/709 (2023.01); H04N 25/745 (2023.01); H04N 25/772 (2023.01)] 13 Claims
OG exemplary drawing
 
1. A ramp signal generator comprising:
a resistance circuit coupled to a first voltage terminal and an output terminal and suitable for adjusting, according to a plurality of control signals, a resistance value applied to the output terminal, a ramp signal being output through the output terminal; and
a current circuit coupled to a second voltage terminal and the output terminal and suitable for adjusting, according to a clock signal, a current level applied to the output terminal and a change rate of the current level,
wherein the plurality of control signals are generated according to an analog gain having a predetermined multiple range, and
wherein the clock signal has a first frequency when the analog gain has a first range within the predetermined multiple range and has a second frequency when the analog gain has a second range within the predetermined multiple range.