Analog-to-digital converter and an image sensor including the same

An image sensor, comprising:

• a pixel array including a plurality of pixels configured to output pixel signals corresponding to incident light;
• a plurality of analog-to-digital converters configured to generate digital signals corresponding to the pixel signals;
• and
• a switch circuit configured to select one of the digital signals based on a column selection signal, the switch circuit configured to output the selected digital signal, at least one of the plurality of the analog-to-digital converters including:
• a modulator configured to generate a modulated signal based on the pixel signals;
• a controller configured to generate a weight control signal;
• and
• a digital filter including a weight signal generator and an integrator, the weight signal generator configured to generate a weight signal based on the weight control signal, the integrator configured to generate the digital signals corresponding to the pixel signals by integrating the weight signal in response to the modulated signal,
• wherein the weight control signal corresponds to a type and an order of the digital filter.

An image sensor, comprising:

• a pixel array including a plurality of pixels outputting first through (N)-th pixel signals corresponding to intensity of incident light (N is a natural number);
• a controller configured to generate a weight control signal;
• a weight signal generator configured to generate a weight signal based on the weight control signal;
• first through (N)-th modulators;
• first through (N)-th integrators;
• and
• a switch circuit configured to select one of first through (N)-th digital signals based on a column selection signal, the switch circuit configured to output the selected digital signal,
• wherein the weight control signal corresponds to a type and an order of digital filtering,
• wherein the (K)-th modulator generates the (K)-th modulated signal based on the (K)-th pixel signal (K is a natural number less than or equal to N),
• wherein the (K)-th integrator generates the (K)-th digital signal corresponding to the (K)-th pixel signal by integrating the weight signal in response to the (K)-th modulated signal.