发明名称 |
Differential input buffers with elevated power supplies |
摘要 |
Input buffer circuitry for handling high-speed differential input signals on an integrated circuit is provided. The input buffer circuitry may use two parallel differential input buffers with overlapping input-voltage ranges. Logic on the integrated circuit may be powered at a core-logic power supply voltage. Input-output circuitry on the integrated circuit may be powered at an input-output voltage level. To improve the performance of the input buffers in the overlap range, at least one the input buffers can be powered using a total power supply voltage drop that exceeds the core-logic power supply level. One of the input buffers may be configured to handle lower-voltage input signals. This input buffer may be powered using the input-output power supply level.
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申请公布号 |
US7046037(B1) |
申请公布日期 |
2006.05.16 |
申请号 |
US20050153676 |
申请日期 |
2005.06.15 |
申请人 |
ALTERA CORPORATION |
发明人 |
TYHACH JEFFREY;WANG BONNIE;SUNG CHIAKANG;NGUYEN KHAI |
分类号 |
H03K19/0175;H03K17/041;H03K19/0185;H04L25/02 |
主分类号 |
H03K19/0175 |
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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