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:
Jun. 17, 2025
Filed:
Nov. 22, 2023
Vanguard International Semiconductor Corporation, Hsinchu, TW;
Jung-Tsun Chuang, Tainan, TW;
Shao-Chang Huang, Hsinchu, TW;
Li-Fan Chen, Hsinchu, TW;
Chun-Chih Chen, New Taipei, TW;
Gong-Kai Lin, Yilan County, TW;
Chien-Wei Wang, Taoyuan, TW;
VANGUARD INTERNATIONAL SEMICONDUCTOR CORPORATION, Hsinchu, TW;
Abstract
A level shifter includes a level shifting circuit and a voltage tracking circuit. The level shifting circuit receives an input signal through an input terminal and converts the input signal from a first power domain to a second power domain to generate an output signal at an output terminal. The voltage tracking circuit is coupled to first and second voltage terminals, and tracks one with a lower level among voltages of the first and second voltage terminals to generate a control voltage. The level shifting circuit includes first and second N-type transistors. The first N-type transistor has a gate coupled to the input terminal, a drain coupled to a first node, and a source coupled to a ground. The second N-type transistor has a gate receiving the control voltage, a drain coupled to the output terminal at a second node, and a source coupled to the input terminal.