| CPC H04N 25/767 (2023.01) [H04N 25/616 (2023.01); H04N 25/772 (2023.01)] | 20 Claims |
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13. A method of generating a ramp signal in an image sensor, the method comprising:
a first operation of detecting, based on a measurement value, a capacitance of a parasitic capacitor of an output node of a ramp signal generating device provided between the output node of the ramp signal generating device and a plurality of buffers which receive and buffer the ramp signal, wherein the plurality of buffers are configured to transfer the buffered ramp signal to corresponding ones of a plurality of comparators;
a second operation of charging the ramp signal with a ramp signal start voltage; and
a third operation of generating a load current enabling the ramp signal start voltage to vary with a first predetermined slope, based on the detected capacitance.
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