Abstract: A receiver circuit and a method of operating the receiver circuit are provided. The receiver circuit includes: a first stage circuit configured to perform a waveform adjustment or amplification operation on first and second input differential signals; a replica circuit configured to receive a common mode voltage and perform a waveform adjustment operation or amplification operation on the common mode voltage; a multiplexer that is configured to output one of an output of the first stage circuit and an output of the replica circuit as first and second intermediate differential signals based on an offset calibration enable signal; and an offset calibration logic configured to receive a digital signal generated based on the first and second intermediate differential signals, and perform an offset calibration operation based on the digital signal.

Abstract: An indoor image quality evaluation system includes an imaging robot on which an image sensor to be evaluated is mounted and which autonomously travels, an indoor studio having a circulation path on which the imaging robot moves, subjects arranged along the circulation path, an adjustable light configured to provide different imaging environments for the subjects, and a management server configured to control the imaging robot, the adjustable light, and the image sensor.

Abstract: An operating method of a camera test device using a test chart includes an operation of receiving, from a camera module, image data generated by imaging the test chart and an operation of measuring a resolution by depth of the camera module from the image data, wherein the test chart is a three-dimensional (3D) chart including a first test pattern radiating from a vertex of the test chart, and the first test pattern is a pattern of an outer surface of the test chart in which white and black surfaces are arranged alternately.