| 摘要 |
PROBLEM TO BE SOLVED: To appropriately cancel a meta-stable state in an A/D converter.SOLUTION: An analog/digital conversion circuit includes: a D/A conversion section 10 which performs digital/analog conversion on a digital code for comparison; a comparison section 20 for comparing an analog signal with the digital code on which the digital/analog conversion has been performed; an output section 423 which outputs digital data corresponding to a comparison result of the comparison section; and a timer circuit 44 which counts a specific time. In the case where the comparison section completes comparison within the specific time when generating the digital data, a digital value corresponding to the comparison result is set to the digital data. In the case where the comparison section does not complete comparison within the specific time, the comparison is ended and a predetermined digital value is set to the digital data.SELECTED DRAWING: Figure 2 |
