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. 20, 2016
Filed:
Sep. 06, 2011
Yao-zhong Zhang, Shanghai, CN;
Ju-ming Chou, Hsinchu County, TW;
Chih-tien Chang, Hsinchu County, TW;
Yao-Zhong Zhang, Shanghai, CN;
Ju-Ming Chou, Hsinchu County, TW;
Chih-Tien Chang, Hsinchu County, TW;
MSTAR SEMICONDUCTOR, INC., Hsinchu Hsien, TW;
Abstract
An input/output (IO) circuit with high voltage tolerance is provided. In an integrated circuit, the IO circuit includes a charge pump for generating a bias voltage higher than an internal operating voltage of the charge pump itself, and a switch between an external circuit and an internal circuit of the integrated circuit. When the switch conducts between the external circuit and the internal circuit, the switch provides a clamping voltage according to the bias voltage and a cross voltage of the switch, so that a voltage of the internal circuit is bounded by the clamping voltage to prevent the internal circuit from over-voltage.