An electronic circuit includes a unit pixel, a first clamp circuit, and a second clamp circuit. The unit pixel outputs a voltage having an output voltage level at a first output voltage level in a first time interval and at a second output voltage level in a second time interval different from the first time interval. The first clamp circuit is configured to clamp the output voltage level from the unit pixel to a first voltage level responsive to the first output voltage level being not greater than the first voltage level in the first time interval. The second clamp circuit is configured to clamp the output voltage level from the unit pixel to a second voltage level responsive to the second output voltage level being not greater than the second voltage level in the second time interval.

An image sensing device includes a pixel array including a plurality of unit pixels coupled to a plurality of row lines, wherein at least one of the unit pixels includes a photo-diode for generating photo charges corresponding to an incident light and a transfer transistor for transferring the photo charges to a floating diffusion (FD) node in response to a transfer control signal transferred through a corresponding row line; a row control circuit disposed at a first side of the pixel array and suitable for providing, to the respective row lines, the transfer control signal having a voltage level between a first voltage and a second voltage; and a bias compensation circuit disposed at a second side of the pixel array and suitable for driving the transfer control signal to the second voltage during a reset read-out section of each of the row lines.

An image sensor includes a pixel array including a first pixel and a second pixel which are connected to a first column line, and a row driver configured to control a read operation of the second pixel. A voltage of the first column line is determined based on a higher voltage among a voltage of a floating diffusion node of the first pixel and a voltage of a floating diffusion node of the second pixel during the read operation of the second pixel.

An imaging device includes pixels arranged to form columns and each including a photoelectric conversion unit that generates charges by photoelectric conversion, column circuits provided to the columns, respectively, and each receiving a signal from a part of the pixels, a first common control line connected to each of the column circuits, and a control unit that controls the column circuits. Each of the column circuits includes an amplifier circuit whose gain is switchable and a first transistor that controls a current flowing in the amplifier circuit, and the control unit controls the column circuit so that the first transistor supplies a current of a first current value when the amplifier circuit is at a first gain and the first transistor supplies a current of a second current value different from the first current value when the amplifier circuit is at a second gain different from the first gain.

An image sensor includes a pixel array including a first pixel and a second pixel which are connected to a first column line, and a row driver configured to control a read operation of the second pixel. A voltage of the first column line is determined based on a higher voltage among a voltage of a floating diffusion node of the first pixel and a voltage of a floating diffusion node of the second pixel during the read operation of the second pixel.

An apparatus of reading out an image sensor having a plurality of pixels arranged in rows and columns includes a plurality of analog-to-digital converters (ADCs) configured to output digital codes representative of received pixel signals of pixels coupled to respective ADCs, and a smear cancellation circuit configured to determine an average value of the digital codes, multiply the average value by a factor to obtain an offset value, and subtract the offset value from the digital codes to obtain smear-cancelled digital codes.

An image sensor and an operation method of the image sensor are disclosed. The image sensor includes a pixel array and a row driver. The pixel array includes a first pixel and a second pixel. Each of the first pixel and the second pixel includes at least one photosensitive element and a switching element configured to transfer charges generated by the at least one photosensitive element to a floating diffusion node. The first pixel and the second pixel are connected to a same column line. The row driver is configured to provide a clamping control signal to the switching element in the first pixel. The clamping control signal transits from a first level to a second level that is less than the first level, during a read period of the second pixel.

To reduce the number of ADCs in a solid-state image sensor that converts an analog pixel signal into a digital signal. An effective pixel generates an analog signal according to an amount of received light as an effective pixel signal using a power supply from a power supply line. A correction signal generation unit generates an analog signal including a noise component generated in the power supply line as a correction signal. A selection unit sequentially selects and outputs the effective pixel signal and the correction signal. An analog-digital converter performs processing of converting the output effective pixel signal into a digital signal and outputting the digital signal as effective pixel data and processing of converting the output correction signal into a digital signal and outputting the digital signal into correction data. A signal processing unit corrects the effective pixel data on the basis of the correction data.

An electronic circuit includes a unit pixel, a first clamp circuit, and a second clamp circuit. The unit pixel outputs a voltage having an output voltage level at a first output voltage level in a first time interval and at a second output voltage level in a second time interval different from the first time interval. The first clamp circuit is configured to clamp the output voltage level from the unit pixel to a first voltage level responsive to the first output voltage level being not greater than the first voltage level in the first time interval. The second clamp circuit is configured to clamp the output voltage level from the unit pixel to a second voltage level responsive to the second output voltage level being not greater than the second voltage level in the second time interval.

An image sensor includes a pixel array including a pixel array comprising a first pixel and a second pixel which are electrically connected to a first column line, a row driver configured to receive a clamp voltage and a selection voltage, select the first pixel based on the clamp voltage and select the second pixel based on the selection voltage. A voltage of the first column line is determined based on a higher voltage among a first output voltage of the first pixel and a second output voltage of the second pixel during a read operation of the second pixel.