发明授权
US4345322A Pickup cartridge for reproducing signals recorded on a 45-45
stereophonic record disk
失效
用于再现记录在45-45立体声记录盘上的信号的拾取盒
- 专利标题： Pickup cartridge for reproducing signals recorded on a 45-45 stereophonic record disk
- 专利标题（中）： 用于再现记录在45-45立体声记录盘上的信号的拾取盒
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申请号： US169987申请日： 1980-07-18
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公开(公告)号： US4345322A公开(公告)日： 1982-08-17
- 发明人: Kenshiro Aizawa , Hisashi Okada
- 申请人： Kenshiro Aizawa , Hisashi Okada
- 申请人地址： JPX Hamamatsu
- 专利权人： Nippon Gakki Seizo Kabushiki Kaisha
- 当前专利权人： Nippon Gakki Seizo Kabushiki Kaisha
- 当前专利权人地址： JPX Hamamatsu
- 优先权： JPX52-106790[U] 19770810; JPX52-107865[U]JPX 19770812
- 主分类号： H04R1/16
- IPC分类号： H04R1/16 ; H04R9/16 ; H04R11/12
摘要：
In a pickup cartridge of the moving magnet type, the components of movement of a cantilever in the vertical and horizontal directions are individually detected to produce two kinds of electromotive forces respectively proportional to the velocity of the detected vertical and horizontal components of movement. The sum and difference signals of the two kinds of electromotive forces are separately obtained for stereophonic reproduction of signals recorded on a recorded disk. The vibration system is given different vibration characteristics for vertical movements thereof than those for horizontal movements thereof, without sacrificing electrical output characteristics such as channel separation characteristic and low frequency response characteristic.
公开/授权文献
- US6111532A Waveform shaper and sigma-delta D/A converter 公开/授权日：2000-08-29
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