Invention Grant
- Patent Title: Crosstalk detector for optically read signals
- Patent Title (中): 用于光学读取信号的串扰检测器
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Application No.: US197611Application Date: 1994-02-17
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Publication No.: US5481369APublication Date: 1996-01-02
- Inventor: Toru Akiyama
- Applicant: Toru Akiyama
- Applicant Address: JPX Tokyo
- Assignee: Pioneer Electronic Corporation
- Current Assignee: Pioneer Electronic Corporation
- Current Assignee Address: JPX Tokyo
- Priority: JPX2-403098 19901218
- Main IPC: G11B7/00
- IPC: G11B7/00 ; G11B7/005 ; G11B7/095 ; G11B20/02 ; G11B20/22 ; H04N5/76 ; H04N5/911
Abstract:
A crosstalk detector for detecting the crosstalk of signals optically read from a recording medium having a plurality of tracks. A changeover circuit selects one of first and second signals generated by first and second oscillators. The amplitude of a signal of a predetermined center frequency is extracted from the selected signal and RF signal and that amplitude is compared with a control signal that inverts at every horizontal synchronizing period of a video signal demodulated from the RF signal.
Public/Granted literature
- US4971119A Arrangement for closing valves of valve bags which are filled by filling machine Public/Granted day:1990-11-20
Information query
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