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:
Apr. 19, 2005
Filed:
Sep. 30, 2003
Applicants:
Sheng-hua Chen, Kaohsiung, TW;
Hung-yi Chang, Hsinchu, TW;
Jeng-huang Wu, Taipei, TW;
Inventors:
Assignee:
Faraday Technology Corp., Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B001/00 ;
U.S. Cl.
CPC ...
Abstract
An input/output buffer. An input/output circuit has a transmission terminal coupled to an I/O pad, and a floating N-well region. A P-gate control circuit conveys the second gate control signal to the gate of the first PMOS transistor. A feedback detection device is coupled between the transmission terminal and an N-well control circuit to output a feedback signal according to an input voltage at the I/O pad. The N-well control circuit adjusts the voltage level at the N-well region of the first PMOS transistor according to the feedback signal output from the feedback detection device.