Skhynix Inc.

Hynix Semiconductor Inc.

Si-Wook Yoo

Won-Seok Hwang

Jung-Eun Song

A group selection circuit includes an input block suitable for receiving a last column select signal of a previous column switch group and a last column select signal of a current column switch group; and a group selection block suitable for generating a group select signal that is activated from a first edge of the last column select signal of the previous column switch group to a first edge of the last column select signal of the current column switch group, in response to an output signal of the input block.

Group selection circuit, and column readout device and method thereof

An image sensing device includes: a pixel suitable for generating a pixel signal based on a first driving voltage; a ramp signal generation block based on a variable resistance, the ramp signal generation block being suitable for generating a ramp signal whose slope is controlled by a resistance value varied according to an analog gain; a noise compensation block based on a fixed resistance suitable for sensing a noise component included in the first driving voltage to generate a noise signal and reflecting the noise signal in the ramp signal; and a digital processing block suitable for generating a digital signal based on the pixel signal and the ramp signal.

Image sensing device insensitive to noise

A ramp signal generator may include a ramp signal generation unit suitable for generating a ramp signal and a gain amplification control signal, an overlap voltage generation unit suitable for generating an overlap voltage to be overlapped with the ramp signal, and a voltage overlapping unit suitable for controlling a voltage gain by amplifying the ramp signal according to the gain amplification control signal, and overlapping the overlap voltage with the ramp signal.

Ramp signal generator and CMOS image sensor having the same

An image sensing device includes a ramp voltage generation block suitable for generating a ramp voltage adjusted by a predetermined voltage in each predetermined cycle, based on a bias signal and a plurality of first ramp control signals; and a ramp voltage correction block suitable for correcting the ramp voltage in each predetermined cycle based on the bias signal and at least one second ramp control signal.

Image sensing device

An image sensing device includes a first read unit suitable for generating a first read signal by reading a first pixel signal, a first input line suitable for transmitting the first pixel signal, a first feedback line suitable for feeding back the first read signal, a second read unit disposed adjacent to the first read unit in a same row and suitable for generating a second read signal by reading a second pixel signal, a second input line suitable for transmitting the second pixel signal, and a second feedback line suitable for feeding back the second read signal wherein the first input line and the first feedback line are disposed symmetrically to the second input line and the second feedback line.

Image sensing device having input/output lines

A comparator includes a common mode voltage sampling unit suitable for sampling a common mode voltage based on a sampling control signal; a coarse ramping voltage sampling unit suitable for sampling a coarse ramping voltage based on the sampling control signal; a preamplifier suitable for amplifying a difference between an input voltage and the sampled coarse ramping voltage to output a coarse conversion result, and amplifying a difference between a fine ramping voltage and the sampled common mode voltage to output a fine conversion result; and a signal processing unit suitable for generating the sampling control signal based on the coarse conversion result, and generating a comparison signal based on the coarse conversion result and the fine conversion result.

Comparator, analog-to-digital converting apparatus including the same, and analog-to-digital converting method

A counting device includes a control unit suitable for generating a control signal including a first control signal and a second control signal, a first operation unit suitable for performing a logic operation for pixel signals of a pixel array and a control signal, wherein pixel signals of used column in the pixel array are transferred by using the first control signal, and pixel signals of unused column in the pixel array are blocked by using the second control signal during a binning mode operation, a second operation unit suitable for performing a logic operation for a counter clock and an output signal of the first operation unit, and a counting unit suitable for counting an output signal of the second operation unit.

Counting device for reducing power consumption in binning mode and method therefor

A preamplifier may include: a common active load suitable for providing output impedance; an output polarity changing unit suitable for changing an output polarity of output nodes; a multi-differential input stage suitable for receiving an input voltage, a coarse ramping voltage, a fine ramping voltage and a common mode voltage, and sampling the common mode voltage and the coarse ramping voltage for amplification operations; and a coupling blocking unit suitable for blocking a coupling between the output nodes and input nodes that are included in the multi-differential input stage.

Preamplifier, comparator and analog-to-digital converting apparatus including the same

A comparing device includes a first stage comparator and a second stage comparator serially coupled to the first stage comparator, wherein output lines of the second stage comparator are disposed to be overlapped with respective input lines of the second stage comparator.

Method for reducing noise using layout scheme and comparing device

A ramp signal generator includes a reset control block suitable for generating a switch control signal according to a reset control signal from a control unit; a ramp signal generation block suitable for generating differential ramp signals, which include a power noise or a ground noise as well as a ramp noise; and a common noise canceling unit suitable for being initialized according to the switch control signal, and suitable for canceling common noise through a differential operation between the differential ramp signals.

Ramp signal generator with noise canceling function

A differential amplifier includes an input common mode voltage generation unit suitable for generating an input common mode voltage, an input common mode voltage sampling unit suitable for performing an independent sampling operation on the input common mode voltage, and a differential amplifying unit suitable for performing a differential amplifying operation on an input voltage and the sampled input common mode voltage.

Differential amplifier and dual mode comparator using the same

A replica noise generator includes a control logic unit suitable for outputting a capacitance adjusting signal; a replica noise generation unit suitable for generating a replica noise through a coupling of a power voltage used in a pixel array by adjusting a capacitance value in response to the capacitance adjusting signal; and a source follower suitable for inputting the generated replica noise.

Replica noise generator using pixel modeling and ramp signal generator including the same

An image sensing device includes a plurality of pixels arranged in rows and columns and a sampling unit suitable for sampling the plurality of pixels in units of M by N in a binning mode, M and N being a positive integer greater than 2.

Image sensing device and method for operating the same

An amplifier includes a common load suitable for outputting an output signal, a coarse input differential stage, coupled to the common load, suitable for amplifying a difference between an input signal and a coarse ramping signal to output a coarse conversion signal as a first output signal, when the coarse ramping signal is lower than the input signal, and a fine input differential stage, coupled to the common load, suitable for amplifying a difference between a fine ramping signal and a bias signal and compensating the first output signal to output a fine conversion signal as the output signal, when a zero crossing occurs by the compensated first output signal.

Amplifier using multi input differential pair, and comparator and analog-to-digital converting apparatus using the same

A column circuit for an image sensor includes a first column read circuit configured to read data of a first column line, and a second column read circuit configured to read data of a second column line, wherein, during a binning mode, data from two or more pixels are outputted through the first column line and stored in the first column read circuit in a first phase, data from two or more pixels are outputted through the second column line and stored in the second column read circuit in a second phase, and charges are shared between the first column read circuit and the second column read circuit in a third phase.

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Gyeonggi-do, South Korea

Si-Wook Yoo