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:
Mar. 27, 2012
Filed:
Aug. 02, 2011
John C. Masiewicz, Mission Viejo, CA (US);
Mohammad Wares Ali, Irvine, CA (US);
John C. Masiewicz, Mission Viejo, CA (US);
Mohammad Wares Ali, Irvine, CA (US);
Western Digital Technologies, Inc., Irvine, CA (US);
Abstract
A disk drive including a method for determining an amplitude for signal transmission over an interconnect is disclosed. The drive includes a processor that is coupled to a signal measurement circuit and is under the control of a program in conjunction with the signal measurement circuit to transmit a first signal to the host over a transmission medium at a first transmission frequency according to a first speed negotiation process, receive a second signal from the host at the first transmission frequency, determine a first voltage amplitude of the second signal, transmit a third signal to the host at a second transmission frequency according to a second speed negotiation process, receive a fourth signal from the host at the second transmission frequency, determine a second voltage amplitude of the fourth signal, and determine an approximate voltage loss in response to the first and second voltage amplitudes.