发明名称 |
Slew rate limited output driver |
摘要 |
A slew-rate limited output driver circuit that minimizes switching current while delivering sufficient peak load currents is disclosed. The circuit of the present invention includes fixed pull-up and pull-down transistors that are designed to dissipate minimum switching current while maintaining a predetermined slew rate. Additional pull-up and pull-down transistors are then switched in parallel to the fixed pull-up and pull-down transistors to drive the output all the way to full logic levels, after the output signal has made most of its transition. In a preferred embodiment, each switched transistor is controlled by a comparator that generates its output by comparing the level of the output signal to a predetermined reference voltage.
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申请公布号 |
US6031389(A) |
申请公布日期 |
2000.02.29 |
申请号 |
US19970951618 |
申请日期 |
1997.10.16 |
申请人 |
EXAR CORPORATION |
发明人 |
FOTOUHI, BAHRAM;GREGORIAN, ROUBIK |
分类号 |
H03K19/003;(IPC1-7):H03K17/16 |
主分类号 |
H03K19/003 |
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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