Invention Grant
- Patent Title: Frequency control device and information reproduction apparatus
- Patent Title (中): 频率控制装置和信息再生装置
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Application No.: US11439123Application Date: 2006-05-24
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Publication No.: US07693246B2Publication Date: 2010-04-06
- Inventor: Tomohiro Ohama , Junkichi Sugita , Nobuyuki Asai
- Applicant: Tomohiro Ohama , Junkichi Sugita , Nobuyuki Asai
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: Rader, Fishman & Grauer PLLC
- Priority: JPP2005-154296 20050526
- Main IPC: H04L7/00
- IPC: H04L7/00 ; H03D3/24 ; G11B15/00

Abstract:
A frequency control device capable of detecting a frame sync pattern and generating a frequency information accurately even if a reproduction signal is not zero-crossed, and an information reproduction apparatus having the same, which includes an oscillation circuit outputting a clock having a frequency corresponding to a control signal; a converter sampling an input analog signal having a predetermined pattern based on the clock and converting the same to a digital signal; and a frequency detection device detecting an object to be a sync pattern from a changing trend of the digital signal, generating a frequency information for controlling a reproduction clock based on the detected object to be the sync pattern, and outputting the same as the control signal to the oscillation circuit.
Public/Granted literature
- US20060274864A1 Frequency control device and information reproduction apparatus Public/Granted day:2006-12-07
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