发明授权
- 专利标题: Transmit based equalization using a voltage mode driver
- 专利标题(中): 使用电压模式驱动器进行基于发射的均衡
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申请号: US11048440申请日: 2005-02-01
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公开(公告)号: US07227382B1公开(公告)日: 2007-06-05
- 发明人: Gerald R. Talbot , Rohit Kumar , Stephen C. Hale
- 申请人: Gerald R. Talbot , Rohit Kumar , Stephen C. Hale
- 申请人地址: US 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: US CA Sunnyvale
- 代理机构: Meyertons Hood Kivlin Kowert & Goetzel, P.C.
- 代理商 Erik A. Heter; B. Noël Kivlin
- 主分类号: H03K19/0175
- IPC分类号: H03K19/0175
摘要:
A driver circuit. In one embodiment, the driver circuit includes a plurality of pull-up circuits and a plurality of pull-down circuits. The driver circuit also includes control logic that is coupled to activate/deactivate the pull-up and pull-down circuits. The driver circuit may perform emphasized signal transmissions having a voltage swing of a first magnitude or de-emphasized signal transmissions having a voltage swing of a second magnitude, wherein the first magnitude is greater than the second magnitude. The control logic is further configured to activate and/or deactivate pull-up and/or pull-down circuits such that the driver circuit output impedance in the emphasized mode is substantially equal to the output impedance in the de-emphasized mode.