CPC H04N 25/75 (2023.01) [H04N 25/709 (2023.01); H04N 25/76 (2023.01)] | 15 Claims |
1. An image sensing device comprising:
a first anterior comparator suitable for generating a first anterior comparison signal based on a first pixel signal and a ramp signal;
a first posterior comparator suitable for performing a first comparison that compares the first anterior comparison signal with a first reference signal under a first comparison precondition and generating a first posterior comparison signal corresponding to a result of the first comparison;
a second anterior comparator suitable for generating a second anterior comparison signal based on a second pixel signal and the ramp signal; and
a second posterior comparator suitable for performing a second comparison that compares the second anterior comparison signal with a second reference signal under a second comparison precondition different from the first comparison precondition, and suitable for generating a second posterior comparison signal corresponding to a result of the second comparison,
wherein the first posterior comparator includes:
an input circuit suitable for receiving the first anterior comparison signal and the first reference signal;
a loading circuit coupled between the input circuit and a first voltage terminal;
a first current source coupled between the input circuit and a second voltage terminal and suitable for generating a first current corresponding to a voltage level of the first reference signal; and
a second current source coupled between the input circuit and the second voltage terminal and suitable for generating a first adjusting current for adjusting the voltage level of the first reference signal based on a first control code signal.
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