The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 2026
Filed:
Dec. 02, 2024
Nuvoton Technology Corporation, Hsinchu City, TW;
Wei Min Hung, Zhubei City, TW;
Hsin Hung Chen, Zhubei City, TW;
NUVOTON TECHNOLOGY CORPORATION, Hsinchu City, TW;
Abstract
A self-calibration digital-to-analog converter (DAC) and a calibration method for DAC are provided. The circuit includes a resistor circuit, a buffer amplifier, a fine-tuning circuit, and a correction switching circuit. In normal operation mode, the resistor circuit receives the common voltage for conversion. In correction mode, the circuit performs self-correction in a sampling time and a comparison time. During the sampling time, the resistor circuit receives the reference voltage and first correction data, and the buffer amplifier input samples the voltage. During the comparison time, the resistor circuit receives the common connection voltage and second correction data, and the fine-tuning circuit adjusts the correction data until the buffer amplifier output voltage flips and records the correction value corresponding to the second correction data. With this self-correction mechanism, the circuit can output theoretically correct digital-to-analog conversion results under the reference voltage and common connection voltage.