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:
Sep. 04, 2018
Filed:
Dec. 20, 2017
Igt, Las Vegas, NV (US);
Calvin DeCoursey, Reno, NV (US);
Gene E. Powell, Reno, NV (US);
IGT, Las Vegas, NV (US);
Abstract
Techniques for reducing electromagnetic (EM) emission in a wager-based gaming machine. A gaming machine includes one or more processors configured to generate a bus clock signal having a fundamental frequency and fundamental spectral components at harmonics of the fundamental frequency. The fundamental spectral components each have a fundamental amplitude. A signal processor is configured to generate a spread spectrum clock signal having a nominal frequency substantially equivalent to the fundamental frequency of the bus clock signal as well as nominal spectral components at harmonics of the nominal frequency. However, the nominal spectral components each have a nominal amplitude less than the fundamental amplitude of a fundamental spectral component at the same harmonic. A bus connects the signal processor with one or more elements and carries the spread spectrum clock signal to the one or more elements, thereby reducing EM emissions from the bus.