发明名称 |
Adjustable differential input and output drivers |
摘要 |
Systems and methods are provided using common-mode-voltage bias circuitry to make common-mode-voltage adjustments to differential driver circuitry in integrated circuit differential communications links. Adjustable bias circuitry may be controlled using static and dynamic control signals. Dynamic control signals can be produced by core logic on a programmable logic device or other integrated circuit. Static control signals can be produced by programmable elements. Bias circuit adjustments made at one end of a differential link can be used to improve performance at either end of the link or can be used to improve power consumption or to balance power and performance considerations. The same integrated circuit design can be used in both AC-coupled and DC-coupled environments. The bias circuitry can be formed from an adjustable current source and adjustable resistor. The current source and adjustable resistors can be controlled by the same control signals.
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申请公布号 |
US6864704(B1) |
申请公布日期 |
2005.03.08 |
申请号 |
US20030669298 |
申请日期 |
2003.09.24 |
申请人 |
ALTERA CORPORATION |
发明人 |
WONG WILSON;SHUMARAYEV SERGEY |
分类号 |
H03K19/0185;H04L25/02;(IPC1-7):H03K17/16 |
主分类号 |
H03K19/0185 |
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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