Invention Grant
- Patent Title: High-frequency receiving apparatus having wide frequency pull-in range
- Patent Title (中): 具有宽频率拉入范围的高频接收装置
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Application No.: US10315977Application Date: 2002-12-11
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Publication No.: US07263059B2Publication Date: 2007-08-28
- Inventor: Nobuhiro Katoh , Yuki Yoneu
- Applicant: Nobuhiro Katoh , Yuki Yoneu
- Applicant Address: JP Osaka-shi
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka-shi
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2002-013110 20020122
- Main IPC: H04J11/00
- IPC: H04J11/00 ; H04L27/00

Abstract:
A high-frequency receiving apparatus includes a phase pull-in circuit controlling an oscillator so as to eliminate a phase difference, a frequency pull-in circuit controlling the oscillator so as to eliminate a frequency difference, a frequency shift circuit shifting an oscillation frequency of the oscillator by a prescribed frequency when the frequency difference is large, and a control signal generation circuit controlling those circuits according to an algorithm selected from a plurality of algorithms corresponding to, for example, a symbol rate. Therefore, a wide range of frequency can rapidly be pulled regardless of the level of the symbol rate.
Public/Granted literature
- US20030137929A1 High-frequency receiving apparatus having wide frequency pull-in range Public/Granted day:2003-07-24
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