发明名称 |
CMOS buffer with controlled slew rate |
摘要 |
A method and apparatus for a circuit physically realizing a CMOS buffer with a controlled slew rate at the output and using no additional standby power to achieve the slew rate control is described. A feedback path from the output is coupled to transistors comprising a differential pair, the transistors are further coupled to a capacitance. The discharge rate of the capacitance and the size choices of the transistors in the circuit are used with the feedback path to control the high-to-low and low-to high transition rate of the output. The circuit of the invention allows a system designer to construct a buffer for driving a bus with excellent on chip and bus signal noise characteristics using standard digital CMOS technology and having excellent standby and active power characteristics. An open drain buffer and a push-pull buffer are described. An integrated circuit implementing application logic coupled to input/output and output buffers embodying this circuit is disclosed. Other embodiments are also disclosed.
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申请公布号 |
US5619147(A) |
申请公布日期 |
1997.04.08 |
申请号 |
US19950465153 |
申请日期 |
1995.06.05 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
HUNLEY, STEVEN A. |
分类号 |
G06F3/00;G11C11/401;G11C11/409;H03K17/16;H03K17/687;H03K19/003;H03K19/0175;(IPC1-7):H03K17/16;H03K19/094 |
主分类号 |
G06F3/00 |
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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