Invention Grant
- Patent Title: DLL circuit and control method thereof
- Patent Title (中): DLL电路及其控制方法
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Application No.: US12603850Application Date: 2009-10-22
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Publication No.: US08035432B2Publication Date: 2011-10-11
- Inventor: Hiroki Takahashi , Toru Ishikawa
- Applicant: Hiroki Takahashi , Toru Ishikawa
- Applicant Address: JP Tokyo
- Assignee: Elpida Memory, Inc.
- Current Assignee: Elpida Memory, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2008-274440 20081024
- Main IPC: H03L7/06
- IPC: H03L7/06

Abstract:
A DLL circuit includes a first phase comparing circuit that compares phases between an input clock signal and an output clock signal, a first delay circuit that delays the output clock signal, and a second phase comparing circuit that compares phases between the input clock signal and an output signal of the first delay circuit. A delay amount in the variable delay circuit is controlled based on a comparison result of the first phase comparing circuit and a comparison result of the second phase comparing circuit.
Public/Granted literature
- US20100102861A1 DLL CIRCUIT AND CONTROL METHOD THEREOF Public/Granted day:2010-04-29
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