Invention Grant
- Patent Title: M-ary sequence clock spreading
- Patent Title (中): M序列时钟扩展
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Application No.: US14240571Application Date: 2012-09-27
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Publication No.: US08941419B2Publication Date: 2015-01-27
- Inventor: Fabien Journet
- Applicant: ST-Ericsson SA
- Applicant Address: CH Plan-les-Ouates
- Assignee: ST-Ericsson SA
- Current Assignee: ST-Ericsson SA
- Current Assignee Address: CH Plan-les-Ouates
- Agency: Patent Portfolio Builders PLLC
- Priority: EP11306253 20110929
- International Application: PCT/EP2012/069052 WO 20120927
- International Announcement: WO2013/045535 WO 20130404
- Main IPC: H03K21/00
- IPC: H03K21/00 ; H03K21/08 ; H04B15/06

Abstract:
The invention concerns a device for providing a spread frequency clock signal, comprising: —an input (51) to receive a first clock signal having a first frequency; —a programmable clock divider (52) to generate the spread frequency clock signal from the first clock signal; —a first Feedback Shift Register (21), FSR, comprising at least one stage, the FSR being adapted to generate any of an odd number M of different values, the FSR being adapted to pseudo-randomly generate a first sequence of first output values, each corresponding to one of said M different values, and to provide a first output value, according to the sequence, during each clock cycle of the spread frequency clock signal; —a control unit (22) adapted to select a division factor of the programmable clock divider based on the first output value of the FSR during each clock cycle of the spread frequency clock signal; —an output (53) for providing the spread frequency clock signal.
Public/Granted literature
- US20140247073A1 M-ARY Sequence Clock Spreading Public/Granted day:2014-09-04
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