Data transmission circuit, image sensor including the same

A data transmission circuit comprising:

• a positive data transmission line and a negative data transmission line;
• a data output unit connected to the positive data transmission line and negative data transmission line and configured to generate a recovered data signal based on data signals communicated via through the positive data transmission line and negative data transmission line;
• a plurality of data signal driving units respectively connected at different points along the positive data transmission line and negative data transmission line;
• and
• a plurality of pull-up devices respectively corresponding on a one-for-one basis with one of the plurality of data signal driving units and being connected at the different points along the positive data transmission line and negative data transmission line,
• wherein each data signal driving unit provides a positive data signal to the positive data transmission line and a negative data signal to the negative data transmission line, and
• each pull-up device provides a positive pull-up signal to the positive data transmission line and a negative pull-up signal to the negative data transmission line,
• wherein at least one of relative strengths of the respective positive data signals, negative data signals, positive pull-up signals, and negative pull-up signals is adjusted according to one of a number of data transmission distances respectively associated with each one of the plurality of data signal driving units and the data output unit, and
• wherein the pull-up devices are spatially separated from the data output block.

An image sensor comprising:

• a pixel array configured to generate analog signals representing a captured image;
• a signal processor configured to convert the analog signals to first and second digital signals;
• a first positive data transmission line;
• a first negative data transmission line;
• a first data output unit connected to the first positive data transmission line and first negative data transmission line and configured to generate a first recovered data signal based on data signals communicated via the first positive data transmission line and first negative data transmission line;
• and
• a data signal driving circuit including first through (M)-th data signal driving units (M is a natural number) respectively connected at different points along the first positive data transmission line and first negative data transmission line,
• wherein the (K)-th data signal driving unit (K is a natural number which is less than or equal to M) is configured to generate at least one (K)-th positive data signal and at least one (K)-th negative data signal based on at least one (K)-th digital signal among the first digital signals and a data transmission distance between the (K)-th data signal driving unit and the first data output unit, and is configured to provide the at least one (K)-th positive data signal to the first positive data transmission line and the at least one (K)-th negative data signal to the first negative data transmission line,
• wherein a strength of the at least one (K)-th positive data signal and a strength of the at least one (K)-th negative data signal will vary in proportion to the data transmission distance.