Patent ID: 11895420
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. An image sensor device comprising:
a pixel circuit configured to output a pixel signal based on an external light signal;
a ramp generator configured to output a first ramp signal;
a correlated double sampling (CDS) circuit configured to perform correlated sampling based on the pixel signal and the first ramp signal; and
a control circuit connected with the pixel circuit, the CDS circuit, and the ramp generator, and configured to generate a first ramp enable signal, a first enable signal, and a second enable signal,
wherein the ramp generator includes
a ramp circuit configured to receive the first ramp enable signal during a first ramp period, the first ramp period including a first reset period and a first sensing period, and the ramp circuit being configured to output the first ramp signal to the CDS circuit;
an emphasis circuit configured to receive the first enable signal from the control circuit and to increase a voltage level of the first ramp signal during the first reset period, based on the first enable signal; and
a pre-emphasis circuit configured to receive the second enable signal from the control circuit, and to further increase the voltage level of the first ramp signal during a first pre-emphasis period in the first reset period, based on the second enable signal.