Yonsei University

Samsung Electronics Co., Ltd.

Dongmyung Lee

Gunhee Han

Ji Min Cheon

SeungHyun Lim

Youngcheol Chae

Kunhee Cho

Inhee Lee

Eunsoo Chang

The inventive concept relates to a CMOS image sensor and an operating method of the CMOS image sensor. The operating method according to an embodiment of the inventive concept includes generating photoelectrons at a photo sensor element during a first time; generating photoelectrons at the photo sensor element during a second time shorter than the first time; and sensing the photoelectrons generated at the photo sensor element. A gate voltage of a transfer transistor connected to the photo sensor element is set differently at the first time and the second time. With an embodiment of the inventive concept, a dynamic range of the CMOS image sensor increases.

Complementary metal oxide semiconductor image sensor and operating method thereof

According to the present invention, a switched capacitor circuit comprises: an inverting amplifier for removing the offset by using a chopper stabilization circuit; a sampling unit which is connected between an input terminal and the inverting amplifier; and a feedback unit which is connected to the inverting amplifier in parallel.

Switched capacitor circuit

A method of resetting a time-based CMOS image sensor may be provided, where the time-based CMOS image sensor may include a photodiode, a transfer transistor transferring photo-generated charges generated in the photodiode to a floating diffusion node and having a gate to which a ramp signal is input, and a reset transistor resetting the photodiode and the floating diffusion node. The method may include generating photo-generated charges at the photodiode, transferring the photo-generated charges to the floating diffusion node in response to a ramp signal; and resetting a reset electron potential of the photodiode to be higher than a reset electron potential of the floating diffusion node.

Method for resetting time-based CMOS image sensor

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Seoul, South Korea

Dongmyung Lee