Invention Grant
- Patent Title: Multiphase clock generation circuit
- Patent Title (中): 多相时钟发生电路
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Application No.: US13224097Application Date: 2011-09-01
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Publication No.: US08456203B2Publication Date: 2013-06-04
- Inventor: Masafumi Kondou
- Applicant: Masafumi Kondou
- Applicant Address: JP Kawasaki
- Assignee: Fujitsu Limited
- Current Assignee: Fujitsu Limited
- Current Assignee Address: JP Kawasaki
- Agency: Arent Fox LLP
- Priority: JP2010-200174 20100907
- Main IPC: H03K21/00
- IPC: H03K21/00 ; H03K23/00 ; H03K25/00

Abstract:
A multiphase clock generation circuit includes: a first frequency divider to generate a first intermediate clock and a second intermediate clock; a second frequency divider to generate output clocks of a first group including a first output clock and a second output clock; a third frequency divider to generate output clocks of a second group including a third output clock and a fourth output clock; a selector to supply one of the second intermediate clock and a value to the third frequency divider in response to a switching signal; an error detection circuit to detect an error in a phase relationship between the output clock of the first group and the output clock of the second group; and a re-reset circuit to output the switching signal to the selector based on the error.
Public/Granted literature
- US20120056644A1 MULTIPHASE CLOCK GENERATION CIRCUIT Public/Granted day:2012-03-08
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