公开(公告)号：US20180114402A1

公开(公告)日：2018-04-26

申请号：US15848641

申请日：2017-12-20

Applicant: IGT

Inventor： Calvin DeCoursey ,  Gene E. Powell

IPC: G07F17/32 ,  G06F1/08

CPC classification number: G07F17/3227 ,  G06F1/08 ,  G07F17/3223

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.

公开(公告)号：US10068419B2

公开(公告)日：2018-09-04

申请号：US15848641

申请日：2017-12-20

Applicant: IGT

Inventor： Calvin DeCoursey ,  Gene E. Powell

IPC: G06F17/00 ,  G07F17/32 ,  G06F1/08

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.

公开(公告)号：US09858753B2

公开(公告)日：2018-01-02

申请号：US15406091

申请日：2017-01-13

Applicant: IGT

Inventor： Calvin DeCoursey ,  Gene E. Powell

IPC: A63F9/24 ,  G07F17/32 ,  G06F1/08

CPC classification number: G07F17/3227 ,  G06F1/08 ,  G07F17/3223

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.

公开(公告)号：US20170140609A1

公开(公告)日：2017-05-18

申请号：US15406091

申请日：2017-01-13

Applicant: IGT

Inventor： Calvin DeCoursey ,  Gene E. Powell

IPC: G07F17/32 ,  G06F1/08

CPC classification number: G07F17/3227 ,  G06F1/08 ,  G07F17/3223

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.

公开(公告)号：USD723626S1

公开(公告)日：2015-03-03

申请号：US29467535

申请日：2013-09-20

Applicant: IGT

Designer： James A. Vasquez ,  Julia J. Angst ,  John L. Beadell ,  John W. Chamberlain ,  Russell Chudd ,  Matthew D. Cloutier ,  Matthew A. Franich ,  Khanh Trang N. Hajek ,  Mark A. Jaillet ,  Chun J. Jia ,  Charles W. Johnson ,  Patrick J. Nohr ,  Gene E. Powell ,  Jacqueline M. Ragnone ,  Tai Rosander ,  Kirk A. Tedsen ,  Stewart Thoeni ,  James W. Timperley ,  Randall J. Tognoni ,  Gregory D. Wright ,  Jared P. Wulff