Patent ID: 8885085

Claim:
An image sensor comprising; a plurality of pixels arranged in an array of columns and rows; a row driver coupled to pixels in a row of the array to provide a variable driving voltage to drive transistors included in the pixels of the row; and a control logic circuit coupled to provide one or more control logic signals to the row driver, wherein the row driver adjusts a magnitude of the driving voltage in response to the one or more control logic signals, wherein the row driver comprises a plurality of switch units including a first switch unit coupled to receive a most significant bit (MSB) of the control logic signals, wherein the first switch unit couples an output of the row driver to a first voltage source in response to the MSB being in a first logic state, the plurality of switch units comprising a second switch unit coupled to the first switch unit, wherein the first switch unit couples the output of the row driver to the second switch unit in response to the MSB being in a second logic state, wherein the first switch unit comprises a first switch and a second switch, each switch of the first switch unit coupled to be controlled by the MSB of the control logic signals, wherein the first switch is configured to couple the first voltage source to the output of the row driver in response to the MSB being in the first logic state and the second switch is configured to couple the output of the row driver to the second switch unit in response to the MSB being in the second logic state.