发明授权
US5995555A Precoded waveshaping transmitter for a twisted pair which eliminates the
need for a filter
失效
用于双绞线的预编码波形成形发射器，无需滤波器
- 专利标题： Precoded waveshaping transmitter for a twisted pair which eliminates the need for a filter
- 专利标题（中）： 用于双绞线的预编码波形成形发射器，无需滤波器
-
申请号： US947924申请日： 1997-10-09
-
公开(公告)号： US5995555A公开(公告)日： 1999-11-30
- 发明人: David Young
- 申请人： David Young
- 申请人地址： CA Sunnyvale
- 专利权人： Advanced Micro Devices, Inc.
- 当前专利权人： Advanced Micro Devices, Inc.
- 当前专利权人地址： CA Sunnyvale
- 主分类号： H04B1/04
- IPC分类号： H04B1/04 ; H04L25/03 ; H04L25/49
摘要：
A precoded waveshaping transmitter comprises a synchronous delay line circuit, a transmitter state machine and a differential current digital to analog converter. Through the provision of a plurality of precoded staggered time delayed data from the combination of the delay line circuit and transmitter state machine the DAC can provide a predetermined output. In a preferred implementation, a subharmonic frequency can be maintained at least 27dB below the fundamental frequency when the PWT is driven by an all ones Manchester encoded signal.
公开/授权文献
- US5238477A Hepa filter unit having a metallic membrane 公开/授权日：1993-08-24
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