Skhynix Inc.

Jung-Eun Song

Si-Wook Yoo

Min-Seok Shin

A read-out method of an image sensing device includes: firstly counting a reset signal of a pixel signal based on a first analog gain during a first period of a unit row period; storing a result of the first counting as a previous counting result; secondly counting the reset signal based on a second analog gain; thirdly counting a data signal of the pixel signal based on the second analog gain during a second period following the first period in the unit row period; storing a first counting signal corresponding to results of the second counting and the third counting; fourthly counting the data signal based on the first analog gain during a third period following the second period in the unit row period; and storing a second counting signal corresponding to the previous counting result and a result of the fourth counting.

Counting circuit including a plurality of latch circuits and image sensing device with the counting circuit

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 voltage generator may include: a correction block suitable for generating a slope correction signal for first and second periods based on a period signal for distinguishing the periods; a common bias voltage generation block suitable for generating a common bias voltage based on the slope correction signal and a source bias voltage; and a first ramp voltage generation block suitable for generating a first ramp voltage having a predetermined slope during the first period based on the common bias voltage and a first ramp group control signal; and a second ramp voltage generation block suitable for generating ramp voltages having the predetermined slope during the second period based on the common bias voltage and a second ramp group control signal.

Ramp voltage generator, image sensing device including the same and method for driving the image sensing device

An image sensing device includes: a clock signal control block suitable for generating first and second clock control signals to have variable logic combinations for each unit row time; a frequency division block suitable for generating first and second clock signals having different phases based on a reference clock signal and controlling a first delay time reflected in the first clock signal and a second delay time reflected in the second clock signal for each unit row time based on the first and a second clock control signals; and a pixel signal processing block suitable for converting a pixel signal inputted for each unit row time into a digital signal based on the first and second clock signals.

Image sensing device with analog-dithering scheme

A ramp voltage generator includes a first ramp voltage generation block suitable for generating a first ramp voltage with a first slope in response to a bias signal and a first ramp control signal, and a second ramp voltage generation block suitable for generating a second ramp voltage with a second slope corresponding to the first slope in response to the bias signal, a second ramp control signal, and a slope correction signal.

Ramp voltage generator and image sensing device including 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.

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Gyeonggi-do, South Korea

Jung-Eun Song