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:
Feb. 15, 2005
Filed:
May. 09, 2003
Yohan U. Frans, Palo Alto, CA (US);
Nhat M. Nguyen, San Jose, CA (US);
Yueyong Wang, Sunnyvale, CA (US);
Yohan U. Frans, Palo Alto, CA (US);
Nhat M. Nguyen, San Jose, CA (US);
Yueyong Wang, Sunnyvale, CA (US);
Rambus, Inc., Los Altos, CA (US);
Abstract
Receiving units with inputs that may be ground-terminated and with inputs that are selectively ground-terminated or non-ground terminated are enabled with signal level shifting and a termination mode selection input. In a first exemplary implementation, a receiving unit is capable of having ground-terminated inputs. However, common mode voltage of the signal that is input to decoding data recovery circuitry is above ground because the input signal may be level shifted in between the ground-terminated inputs and the decoding data recovery circuitry. In a second exemplary implementation, a mode selection is accomplished by switching a voltage divider into operation and bypassing a level shifter for a non-ground terminated mode. For a ground terminated mode, the voltage divider is switched out of operation and the level shifter is switched into operation for its signal output to be decoded. Pre-amplification may also be employed to improve signal strength.