发明名称 |
On-chip series terminated CMOS(Bi-CMOS) driver |
摘要 |
A terminated driver circuit 10 having a controlled output impedance includes an external impedance 12 connected to a bias generator circuit 20 which is operable to generate a plurality of bias voltages in response to a reference current generated by bias generator circuit 20 wherein the reference current magnitude is a function of external impedance 12. An output driver circuit 30 is connected to bias generator circuit 20. Output driver circuit 30 has a plurality of output devices connected to a transmission line and is operable to receive the plurality of bias voltages from bias generator circuit 20 and multiplex them such that only a single bias voltage is driving a single output device at a time. The plurality of bias voltages causes the plurality of output devices to have specific, controlled impedances when conducting wherein the controlled output impedances match the characteristic impedance of a transmission line 40 being driven by terminated driver circuit 10 thereby reducing waveform reflections.
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申请公布号 |
US5532616(A) |
申请公布日期 |
1996.07.02 |
申请号 |
US19940283436 |
申请日期 |
1994.08.01 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
KEENEY, STANLEY C. |
分类号 |
G05F3/26;H03K19/0175;(IPC1-7):H03K17/16 |
主分类号 |
G05F3/26 |
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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