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:
Jul. 14, 2026
Filed:
Aug. 18, 2022
SG Micro Corp, Beijing, CN;
Lei Tan, Beijing, CN;
SG MICRO CORP, Beijing, CN;
Abstract
The present invention discloses an analog-to-digital converter and an operating method thereof. The analog-to-digital converter includes a plurality of sub-periods in one conversion frame, and performs at least the following operations in each sub-period: a residual charge storage phase, an integration phase, a charge redistribution phase, and an SAR conversion phase. The analog-to-digital converter includes a capacitive digital-to-analog converter and an auxiliary capacitor. The auxiliary capacitor stores residual charge generated by the capacitive digital-to-analog converter in a previous sub-period at the residual charge storage phase. A weight capacitor array of the capacitive digital-to-analog converter integrates an input current signal at the integration phase. The integration charge of the current sub-period is transferred to the weight capacitor array at the charge redistribution phase. It ensures that the analog-to-digital converter continuously integrates the input current signal in the entire conversion frame, improving time utilization and signal-to-noise ratio.