发明名称 |
ON/OFF-TRACK DETECTING APPARATUS FOR COMPATIBLE DISK PLAYER |
摘要 |
An on-track and off-track state detecting apparatus in a compatible disk player capable of playing different types of disks, each carrying thereon at least one of a FM audio signal and an EFM signal. The apparatus detects an on-track state and off-track state by comparing the level of the FM audio signal component with a predetermined level, when the disk being played back does not carry the EFM signal, and by comparing the level of the EFM signal component with a predetermined level, when the disk being played back carries the EFM signal thereon. This apparatus commonly uses a level comparator circuit and performs a reliable detection of the respective on-track and off-track states.
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申请公布号 |
US5130967(A) |
申请公布日期 |
1992.07.14 |
申请号 |
US19900513478 |
申请日期 |
1990.04.23 |
申请人 |
PIONEER ELECTRONIC CORPORATION |
发明人 |
TANAKA, HOZUMI;YOSHIMURA, RYUICHIRO;IZUMO, TAKESHI |
分类号 |
G11B7/085;G11B21/10 |
主分类号 |
G11B7/085 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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