发明名称 |
Methods and apparatus for improved jitter tolerance in an SFP limit amplified signal |
摘要 |
Methods and apparatus are provided for improving the jitter tolerance in an SFP limit amplified signal. Jitter tolerance is improved in a communications receiver by applying a received signal to an SFP limiting amplifier; and applying an output of the SFP limiting amplifier to a low pass filter to improve the jitter tolerance. The low pass filter optionally applies a programmable amount of attenuation to high frequency components of the output. The low pass filter slew rate controls (i.e., rotates) a data eye representation of the received signal to increase the data eye representation along a time axis. The noise margin of the received signal can optionally be improved by applying an output of the low pass filter to an all pass filter. A slew rate controller can evaluate the data eye statistics to determine a setting for the low pass filter.
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申请公布号 |
US8040984(B2) |
申请公布日期 |
2011.10.18 |
申请号 |
US20070967602 |
申请日期 |
2007.12.31 |
申请人 |
AGERE SYSTEM INC. |
发明人 |
AZIZ PERVEZ M.;HEALEY ADAM B.;MOBIN MOHAMMAD S.;SCHIESSLER GARY E.;SHEETS GREGORY W.;SMITH LANE A.;TRACY PAUL H.;ZHANG GEOFFREY |
分类号 |
H04L25/08;H04L7/00;H04L7/10 |
主分类号 |
H04L25/08 |
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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