Image sensing device

An image sensing device, comprising:

• a first anterior comparator configured to be initialized during an initialization time and suitable for generating a first anterior comparison signal based on a first pixel signal and a ramp signal during a row time;
• a first posterior comparator suitable for initializing a first input terminal to a first voltage level and a first sub-input terminal to a default voltage level during the initialization time and generating a first posterior comparison signal based on the first anterior comparison signal input through the first input terminal and a first reference signal input through the first sub-input terminal during the row time;
• a second anterior comparator configured to be initialized during the initialization time and suitable for generating a second anterior comparison signal based on a second pixel signal and the ramp signal during the row time;
• and
• a second posterior comparator suitable for initializing a second input terminal to a second voltage level different from the first voltage level and a second sub-input terminal to the default voltage level during the initialization time, and generating a second posterior comparison signal based on the second anterior comparison signal input through the second input terminal and a second reference signal input through the second sub-input terminal during the row time.

An image sensing device, comprising:

• a first anterior comparator to be initialized during an initialization time and suitable for generating a first anterior comparison signal based on a first pixel signal and a ramp signal during a row time;
• a first posterior comparator suitable for adjusting a voltage level of a first reference signal to a first voltage level during the initialization time, and generating a first posterior comparison signal based on the first anterior comparison signal and the first reference signal during the row time;
• a second anterior comparator to be initialized during the initialization time, and suitable for generating a second anterior comparison signal based on a second pixel signal and the ramp signal during the row time;
• and
• a second posterior comparator suitable for adjusting a voltage level of a second reference signal to a second voltage level different to the first voltage level during the initialization time, and generating a second posterior comparison signal based on the second anterior comparison signal and the second reference signal during the row time.