Invention Grant
- Patent Title: Timing control circuit and semiconductor storage device
- Patent Title (中): 定时控制电路和半导体存储设备
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Application No.: US12208978Application Date: 2008-09-11
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Publication No.: US07772911B2Publication Date: 2010-08-10
- Inventor: Akira Ide , Yasuhiro Takai , Tomonori Sekiguchi , Riichiro Takemura , Satoru Akiyama , Hiroaki Nakaya
- Applicant: Akira Ide , Yasuhiro Takai , Tomonori Sekiguchi , Riichiro Takemura , Satoru Akiyama , Hiroaki Nakaya
- Applicant Address: JP Tokyo
- Assignee: Elpida Memory, Inc.
- Current Assignee: Elpida Memory, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2007-238013 20070913
- Main IPC: G06F1/04
- IPC: G06F1/04

Abstract:
Disclosed is a timing control circuit that receives a first clock having a period T1, a group of second clocks of L different phases spaced apart from each other at substantially equal intervals and selection signals m, n supplied thereto and generates a fine timing signal delayed from the rising edge of the first clock signal by a delay td of approximately td=m·T1+n·(T2/L). The timing control circuit includes a coarse delay circuit and a fine delay circuit. The coarse delay circuit includes a counter for counting a rising edge of the first clock signal after an activate signal is activated and generates a coarse timing signal whose amount of delay from the first clock signal is approximately m·T1. The fine delay circuit comprises L-number of multiphase clock control delay circuits disposed in parallel, delays by n·T2/L the timing of sampling of the coarse timing signal by respective clocks of the group of L-phase second clocks, and takes the OR among the resulting delayed pulses to thereby produce the fine timing signal.
Public/Granted literature
- US20090102524A1 TIMING CONTROL CIRCUIT AND SEMICONDUCTOR STORAGE DEVICE Public/Granted day:2009-04-23
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