Image sensor and operating method of image sensor

An image sensor comprising:

• a pixel array including a plurality of pixels arranged in rows and columns;
• a voltage generating circuit configured to generate a first power supply voltage, a second power supply voltage, a third power supply voltage, and a fourth power supply voltage, wherein the first power supply voltage and the second power supply voltage have a first voltage level, and the third power supply voltage and the fourth power supply voltage have a second voltage level that is lower than the first voltage level;
• and
• a row driver configured to generate a pixel control signal provided to the plurality of pixels based on the first power supply voltage and the third power supply voltage during a first period and generate a pixel control signal provided to the plurality of pixels based on the second power supply voltage and the fourth power supply voltage during a second period after the first period.

An operating method of an image sensor including a pixel array including a plurality of pixels, a row driver driving the pixel array, and a voltage generating circuit providing a power supply voltage to the row driver, the operating method comprising:

• generating, by the voltage generating circuit, a first power supply voltage and a second power supply voltage;
• generating, by the row driver, a pixel control signal provided to the plurality of pixels corresponding to a plurality of rows of the pixel array based on the first power supply voltage during a first period;
• and
• generating, by the row driver, the pixel control signal based on the second power supply voltage during a second period after the first period.