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. 18, 2014
Filed:
Sep. 07, 2012
Marcel A. Kossel, Rueschlikon, CH;
Michael A. Sorna, Hopewell Junction, NY (US);
Thomas H. Toifl, Zurich, CH;
Glen A. Wiedemeier, Austin, TX (US);
Marcel A. Kossel, Rueschlikon, CH;
Michael A. Sorna, Hopewell Junction, NY (US);
Thomas H. Toifl, Zurich, CH;
Glen A. Wiedemeier, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A slew rate control circuit configured to control a slew rate of driver circuit comprises a clock delay module that receives a half-rate clock signal and that includes a plurality of delay cells configured to generate a plurality of respective delayed clock signals each having a different time delay from one another. A driver module includes a plurality of multiplexers in electrical communication with a respective data cell to receive a corresponding delayed clock signal. The multiplexers are configured to output a respective full-rate data stream in response to the delayed clock signal. The slew driver module further includes an output stage circuit in electrical communication with each multiplexer to combine each full-rate data stream and to generate a final step-wise driving signal that controls the slew rate.