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. 15, 2026
Filed:
Jul. 23, 2024
Realtek Semiconductor Corporation, Hsinchu, TW;
Wei-Cian Hong, Hsinchu, TW;
Realtek Semiconductor Corporation, Hsinchu, TW;
Abstract
A capacitive digital-to-analog converter (CDAC) comprising a capacitive structure and a control logic circuit coupled to each other is provided. Two terminals of the capacitive structure respectively receive positive and negative reference voltages. The control logic circuit comprises switch groups that each comprises first and second switch circuits. The first and second switch circuits each comprise first, second terminals and a control terminal. The first terminals of the first and second switch circuits respectively receive positive and negative reference voltages, through first and second shielding layers of the CDAC respectively. The second terminal is coupled to the capacitive structure. The control terminal receives one of turn-on signals through a first metal layer of the CDAC. The capacitive structure is located at least in a second metal layer of the CDAC. The first and second shielding layers are above the first metal layer and below the second metal layer.