发明授权
US5504633A Apparatus, having a variable equalizer, for reproducing a digital signal
from a record carrier
失效
具有可变均衡器的装置,用于从记录载体再现数字信号
- 专利标题: Apparatus, having a variable equalizer, for reproducing a digital signal from a record carrier
- 专利标题(中): 具有可变均衡器的装置,用于从记录载体再现数字信号
-
申请号: US342684申请日: 1994-11-21
-
公开(公告)号: US5504633A公开(公告)日: 1996-04-02
- 发明人: Gijsbert J. Van Den Enden
- 申请人: Gijsbert J. Van Den Enden
- 申请人地址: NY New York
- 专利权人: U.S. Philips Corporation
- 当前专利权人: U.S. Philips Corporation
- 当前专利权人地址: NY New York
- 优先权: EPX92202427 19920806
- 主分类号: G11B5/09
- IPC分类号: G11B5/09 ; G11B20/10 ; H03H15/00 ; H03H17/00 ; H03H17/02 ; H03H17/06 ; H03H21/00 ; H04B3/04 ; H04L25/03 ; G11B5/035 ; H03H7/30
摘要:
An arrangement for reproducing a digital signal from a track on a record carrier includes a read head for reading the signal from the track, and a variable equalizer adapted to equalizer transmission characteristics of a transmission path, including a recording channel up to the variable equalizer, in response to first and second control signals. The first control signal (HF) has a relation with high frequency losses in a magnitude transmission characteristic of the transmission path, and the second control signal (PHI) has a relation with a difference in delay caused by the transmission path between low frequency signals and high frequency signal in an operating frequency range of the transmission path. The variable equalizer has a finite impulse response filter unit, which includes a delay line unit having a number of N taps, a multiplier unit for multiplying a signal present at the n-th tap of the delay line unit by a multiplication factor a(n) and for supplying the multiplier signal to a signal combiner. The variable equalizer also has a multiplication factor generator unit for generating the multiplication factors a(n) in response to the first and second control signals.
公开/授权文献
- US5314282A Composite fastener 公开/授权日:1994-05-24
信息查询
IPC分类: