US 11,706,536 B2
Image sensor including noise compensator and image sensing system including the same
Yun Hong Kim, Seoul (KR); Kyung-Min Kim, Yeongcheon-si (KR); and Hee Sung Chae, Seoul (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Aug. 4, 2021, as Appl. No. 17/393,803.
Claims priority of application No. 10-2020-0161970 (KR), filed on Nov. 27, 2020.
Prior Publication US 2022/0174230 A1, Jun. 2, 2022
Int. Cl. H04N 25/60 (2023.01)
CPC H04N 25/60 (2023.01) 19 Claims
OG exemplary drawing
 
1. An image sensor comprising:
a pixel configured to generate a pixel signal, using an analog signal processing voltage;
a ramp signal generator configured to generate a ramp signal, using the analog signal processing voltage;
a bias voltage generator configured to generate a bias voltage, using the analog signal processing voltage;
a noise compensator configured to:
generate a noise component, using a digital signal processing voltage and the analog signal processing voltage; and
add the generated noise component to the generated bias voltage; and
a conversion circuit configured to:
generate a reference voltage, based on the generated ramp signal and the bias voltage to which the noise component is added; and
generate an image signal by performing analog-to-digital conversion on the generated pixel signal, based on the generated reference voltage,
wherein the analog-to-digital conversion is performed using the digital signal processing voltage.