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. 10, 2013
Filed:
Jan. 31, 2012
Bonnie I. Wang, Cupertino, CA (US);
Chiakang Sung, Milpitas, CA (US);
Xiaobao Wang, Cupertino, CA (US);
Khai Nguyen, San Jose, CA (US);
Joseph Huang, Morgan Hill, CA (US);
Bonnie I. Wang, Cupertino, CA (US);
Chiakang Sung, Milpitas, CA (US);
Xiaobao Wang, Cupertino, CA (US);
Khai Nguyen, San Jose, CA (US);
Joseph Huang, Morgan Hill, CA (US);
Altera Corporation, San Jose, CA (US);
Abstract
One embodiment relates to a programmable output buffer which includes first and second programmable variable-impedance single-ended driver circuits and first and second termination circuits. The first termination circuit is coupled to a first output pin which is driven by the first programmable variable-impedance single-ended driver circuit, and the second termination circuit is coupled to a second output pin which is driven by the second programmable variable-impedance single-ended driver circuit. The first and second termination circuits are programmable to either provide parallel termination for a differential signal or drive single-ended signals with the parallel termination turned off. Other embodiments and features are also disclosed.