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. 24, 2009
Filed:
Sep. 15, 2006
Kiyoshi Kase, Austin, TX (US);
Dzung T. Tran, Austin, TX (US);
Kiyoshi Kase, Austin, TX (US);
Dzung T. Tran, Austin, TX (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A circuit's performance may vary based on various factors such as, for example, process, voltage, and/or temperature. In one embodiment, a circuit includes an input terminal which receives an input signal, a delay selection section which delays the input signal by a delay amount selected by a performance variation indicator, an impedance selection section which outputs the delayed input signal as a compensated delayed signal, where the impedance selection section uses a driver impedance amount selected by the performance variation indicator, and an output terminal which outputs the compensated delayed signal. The circuit may also include a ring oscillator, a frequency counter which provides a count value which indicates a number of rising edges of an output of the ring oscillator which occur during a period of a reference frequency, and a decoder which uses the count value to output the performance variation indicator.