Patent ID: 9258003
Filing Date: 2016-02-09
CPC Classification: H03M

Claim Text:
1. A semiconductor integrated circuit comprising: an A/D conversion unit; a D/A conversion unit; a calibration unit; an AD conversion compensation unit, which compensates an output signal of the A/D conversion unit and outputs an output digital signal; a DA conversion compensation unit, which compensates an input digital signal and outputs a first compensation digital signal and a second compensation digital signal; a selector, which selects one of the input digital signal and the first compensation digital signal, and outputs the one of the input digital signal and the first compensation digital signal to the D/A conversion unit; and a first switch connected to an input terminal of the A/D conversion unit and an output terminal of the D/A conversion unit, wherein the calibration unit determines an operating characteristic of the AD conversion compensation unit in response to the output signal of the A/D conversion unit and a difference between the output digital signal and the second compensation digital signal, and wherein the calibration unit determines an operating characteristic of the DA conversion compensation unit in response to the input digital signal and the difference between the output digital signal and the second compensation digital signal.