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:
May. 26, 2015
Filed:
Mar. 13, 2013
Xiaoxiao Wang, Austin, TX (US);
Nisar Ahmed, Bee Cave, TX (US);
Anis M. Jarrar, Austin, TX (US);
Dat T. Tran, Round Rock, TX (US);
Leroy Winemberg, Austin, TX (US);
Xiaoxiao Wang, Austin, TX (US);
Nisar Ahmed, Bee Cave, TX (US);
Anis M. Jarrar, Austin, TX (US);
Dat T. Tran, Round Rock, TX (US);
Leroy Winemberg, Austin, TX (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A data processing system on an integrated circuit includes a core that performs switching operations responsive to a system clock that draws current from the power supply network. An IR-drop detector includes a resistor ladder having outputs representative of an IR-drop caused by the core during the switching operations. The system further includes a plurality of amplifiers coupled to the outputs indicative of the IR-drop, a plurality of flip-flops coupled to the amplifiers, and a variable clock generator. The variable clock generator outputs a sampling clock comprising a group consisting of a variable phase or a variable frequency to the plurality of flip-flops. The flip-flops are triggered by the sampling clock so that the IR-drop at a time during a clock cycle of the system clock can be detected, and the peak IR-drop value for can be tracked.