发明名称 |
Pre-emphasis automatic adjusting method and data transmission system using same |
摘要 |
A signal transmission system is provided which is capable of simplifying circuits and shortening time required for automatic adjustment of pre-emphasis. A signal having a single pulse pattern is generated by a single pulse pattern generating circuit. A signal having passed through a selector is divided into two signals whose phases are inverted and which are transmitted to a receiving circuit. An eye aperture of an eye waveform in a direction of time is measured by an eye aperture judging section by using the two signals and a sampling clock output from a sampling clock controlling section. An adjustment controlling section compares the measured eye aperture with a target value for judgment and transmits the judgment result to the transmitting circuit, where pre-emphasis is adjusted based on the judgment result. |
申请公布号 |
US8243845(B2) |
申请公布日期 |
2012.08.14 |
申请号 |
US20090320934 |
申请日期 |
2009.02.09 |
申请人 |
TANABE MOTOI;NEC CORPORATION |
发明人 |
TANABE MOTOI |
分类号 |
H04L27/04;H03K17/16;H03K19/003 |
主分类号 |
H04L27/04 |
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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