发明授权
- 专利标题: Semiconductor device including a delay locked loop circuit
- 专利标题(中): 半导体器件包括延迟锁定环电路
-
申请号: US14152488申请日: 2014-01-10
-
公开(公告)号: US08917130B2公开(公告)日: 2014-12-23
- 发明人: Ryo Fujimaki
- 申请人: Ryo Fujimaki
- 申请人地址: LU Luxembourg
- 专利权人: PS4 Luxco S.A.R.L.
- 当前专利权人: PS4 Luxco S.A.R.L.
- 当前专利权人地址: LU Luxembourg
- 代理机构: McGinn IP Law Group, PLLC
- 优先权: JP2011-094264 20110420
- 主分类号: H03L7/00
- IPC分类号: H03L7/00 ; H03L7/10 ; H03L7/081
摘要:
A method for initializing a delay locked loop having a delay circuit includes a plurality of serially connected delay elements and a counter circuit for selecting an output of one of the delay elements as an output clock signal. The method includes resetting an initial delay control circuit, generating, with the initial delay control circuit, a pulse based on a period of an input clock signal, determining, with the initial delay control circuit, a number of delay elements required to produce a delay time at least substantially equivalent to a pulse width for a preset signal, initializing the counter circuit based on the preset signal and adjusting the counter circuit in response to phases of the input and output clock signals.
公开/授权文献
信息查询