Abstract: An image sensing device includes a pixel configured to generate a pixel signal having a single photon avalanche diode (SPAD) pulse by detecting incident light, a time-to-digital converter (TDC) configured to generate time-to-digital converter (TDC) data representing a time of flight (TOF) for the SPAD pulse, and a TDC memory configured to store the TDC data in a unit memory that is determined from among a plurality of unit memories according to the number of occurrences of the SPAD pulse.

Abstract: An image sensing device capable of detecting a distance to a target object according to a time-of-flight (TOF) method is disclosed. The image sensing device includes a plurality of light receiving elements each configured to generate a sensing voltage corresponding to a current pulse based on a photon reflected from a target object; a plurality of quenching circuits corresponding to the respective light receiving elements and each configured to output a pixel signal by controlling the sensing voltage from a corresponding light receiving element of the light receiving elements, and a readout circuit shared by the plurality of quenching circuits and configured to generate a readout signal by controlling a delay time of the pixel signal.

Abstract: An image sensing device includes a pixel configured to generate a pixel signal having a single photon avalanche diode (SPAD) pulse by detecting incident light, a time-to-digital converter (TDC) configured to generate time-to-digital converter (TDC) data representing a time of flight (TOF) for the SPAD pulse, and a TDC memory configured to store the TDC data in a unit memory that is determined from among a plurality of unit memories according to the number of occurrences of the SPAD pulse.

Abstract: An image sensor includes: a pixel of a first tab; a pixel of a second tab; an operation amplifier suitable for comparing, in a comparison operation, a pixel signal of the first tab and a pixel signal of the second tab with each other to produce a comparison result, receiving, in an auto-zeroing operation, a ramp voltage and a selected pixel signal which is selected based on the comparison result between the pixel signal of the first tab and the pixel signal of the second tab, and receiving, in an analog-to-digital conversion operation, the ramp voltage and an unselected pixel signal which is not selected from the pixel signal of the first tab and the second pixel signal of the second tab; and a counter circuit suitable for generating a digital code based on an output of the operation amplifier.

Abstract: An analog-to-digital converting circuit includes: an analog-to-digital converter suitable for performing an analog-to-digital conversion on pixel signals of a plurality of pixels provided in a pixel array; a ramp signal generator suitable for providing a ramp signal to the analog-to-digital converter; and an auto-zero controller suitable for providing a reference voltage to the analog-to-digital converter to perform an auto-zeroing operation by using a row pixel for which a readout operation is performed by the analog-to-digital converter.

Abstract: An analog-to-digital converting circuit includes: an analog-to-digital converter suitable for performing an analog-to-digital conversion on pixel signals of a plurality of pixels provided in a pixel array; a ramp signal generator suitable for providing a ramp signal to the analog-to-digital converter; and an auto-zero controller suitable for providing a reference voltage to the analog-to-digital converter to perform an auto-zeroing operation by using a row pixel for which a readout operation is performed by the analog-to-digital converter.

Abstract: An image sensor includes: a pixel of a first tab; a pixel of a second tab; an operation amplifier suitable for comparing, in a comparison operation, a pixel signal of the first tab and a pixel signal of the second tab with each other to produce a comparison result, receiving, in an auto-zeroing operation, a ramp voltage and a selected pixel signal which is selected based on the comparison result between the pixel signal of the first tab and the pixel signal of the second tab, and receiving, in an analog-to-digital conversion operation, the ramp voltage and an unselected pixel signal which is not selected from the pixel signal of the first tab and the second pixel signal of the second tab; and a counter circuit suitable for generating a digital code based on an output of the operation amplifier.

Abstract: An image sensing device includes a pixel array including a unit pixel suitable to transfer and store charges in response to a transfer signal and read out a pixel signal corresponding to the stored charges in response to a selection signal provided to the unit pixel; a signal converter suitable for comparing the pixel signal with a ramp signal based on a switch signal to generate a distance information signal; and a signal controller suitable for generating the switch signal for initializing the signal converter in a temporal section where the pixel signal is read out.