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. 21, 2009
Filed:
Mar. 26, 2007
Applicants:
Mei Luo, San Jose, CA (US);
Vinh Van Ho, San Jose, CA (US);
Inventors:
Mei Luo, San Jose, CA (US);
Vinh Van Ho, San Jose, CA (US);
Assignee:
Altera Corporation, San Jose, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03K 19/0175 (2006.01);
U.S. Cl.
CPC ...
Abstract
In level-shifting circuitry for shifting low-voltage-domain signals to a high-voltage domain, one of two output transistors is driven with one of the low-voltage-domain signals, thereby reducing loading on the output and increasing output speed and bandwidth. The circuitry can be mirrored for differential operation. When included in a serial interface of a programmable logic device, the circuitry can be programmably selectable between single-ended and differential operation.