Integrant Technologies Inc.

Jinkyu Lim

Bonkee Kim

Junghwan Lee

Bo-Eun Kim

Minsu Jeong

Jungwan Lee

Provided are a direct current (DC) offset compensation apparatus and a method thereof. A DC offset compensation apparatus comprises an offset detection block detecting a DC offset, an offset compensation block operating according to an output signal of the offset detection block, and an offset compensation amplifying block controlled according to an output signal of the offset compensation block. Particularly, the offset compensation block comprises a counter that counts polarities of DC offsets for a predetermined period, a controller that comprises first to fourth mode units respectively operating fast down-compensation, regular down-compensation, fast up-compensation, and regular up-compensation modes, and a control device that controls the execution of one selected among the first to fourth mode units based on a value counted by the counter, and a register storing data to control the offset compensation amplifying block based on the one mode unit determined by the controller.

Adaptive DC offset compensation apparatus and method thereof

A signal processing apparatus for correcting DC offset in a communication system is provided. The signal processing apparatus comprises: a low noise amplifier (LNA) ; a mixer for mixing the output from said LNA with local oscillation signal LO; a first offset correction amplifier for amplifying output signal from said mixer and for eliminating DC offset in the output signal in accordance with first control signal Vc ; a second offset correction amplifier for amplifying output signal from said first offset correction amplifier and for eliminating DC offset in the output signal in accordance with second control signal Vc ; a variable gain amplifier for amplifying output from said second offset correction amplifier wherein gain is controlled such that power level of output be maintained to a desired value; offset calibration mean for calibrating DC offset in output from said variable gain amplifier ; and offset correction mean for outputting the first and second control signals Vc and Vc in accordance with the output from said offset calibration mean , to eliminate DC offset in the output from said variable gain amplifier

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Gyeonggi-do, South Korea

Jinkyu Lim