发明名称 |
TX LINE DRIVER WITH COMMON MODE IDLE STATE AND SELECTABLE SLEW RATES |
摘要 |
A transmit line driver with selectable slew rates and a common mode idle state comprises a capacitor array of selectable capacitors coupled between a line driver and a pre-driver wherein a slew rate may be selected by the selectable capacitors. A common mode idle state is provided by coupling a selectable switch (MOSFET in the described embodiment) to a mirror device that provides a bias current to the pre-driver wherein, when the bias current is removed by the switch, the pre-driver produces an output signal that is equal to the supply voltage for the circuit. Accordingly, a differential pair of the line driver are both biased on and provide a common mode idle state. The common mode idle state is equal to one half of an output signal magnitude for a logic one. |
申请公布号 |
EP1665691(A2) |
申请公布日期 |
2006.06.07 |
申请号 |
EP20040783907 |
申请日期 |
2004.09.10 |
申请人 |
XILINX, INC. |
发明人 |
GEOEN, ERIC, D.;BOECKER, CHARLES, W.;BLACK, WILLIAM, C. |
分类号 |
H03K17/16;H03K19/00;H03K19/003;H03K19/0185;H04L25/02;H04L27/10;(IPC1-7):H04L25/02 |
主分类号 |
H03K17/16 |
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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