发明申请
- 专利标题: TIMING CONTROL CIRCUIT AND SEMICONDUCTOR STORAGE DEVICE
- 专利标题(中): 时序控制电路和半导体存储器件
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申请号: US12205668申请日: 2008-09-05
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公开(公告)号: US20090066390A1公开(公告)日: 2009-03-12
- 发明人: Akira IDE , Yasuhiro TAKAI , Tomonori SEKIGUCHI , Riichiro TAKEMURA , Satoru AKIYAMA , Hiroaki NAKAYA
- 申请人: Akira IDE , Yasuhiro TAKAI , Tomonori SEKIGUCHI , Riichiro TAKEMURA , Satoru AKIYAMA , Hiroaki NAKAYA
- 申请人地址: JP Tokyo
- 专利权人: ELPIDA MEMORY, INC.
- 当前专利权人: ELPIDA MEMORY, INC.
- 当前专利权人地址: JP Tokyo
- 优先权: JP2007-233001 20070907
- 主分类号: H03H11/26
- IPC分类号: H03H11/26
摘要:
Disclosed is a timing control circuit which receives a first clock having a period T1 and a group of second clocks of L different phases (where L is a positive integer) spaced apart from each other at substantially equal intervals and which generates a fine timing signal delayed from the rising edge of the first clock by a delay td of approximately td=m·T1+n·(T2/L), where m and n are non-negative integers. The timing control circuit has a coarse delay circuit and a fine delay circuit. The coarse delay circuit counts the rising edges of the first clock after an activate signal is activated and generates a coarse timing signal delayed from the first clock by approximately m·T1. The fine delay circuit has a circuit which, after the activate signal is activated, detects a second clock, which has a rising edge that immediately follows the rising edge of the first clock, from among the group of L-phase second clocks. Using the edge-detection information, the fine delay circuit generates a fine timing signal for which the amount of delay from the coarse timing signal is approximately n·(T2/L). The values of m and n can be set by registers.
公开/授权文献
- US07973582B2 Timing control circuit and semiconductor storage device 公开/授权日:2011-07-05
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