发明授权
- 专利标题： Voltage translator for interfacing TTL and CMOS circuits
- 专利标题（中）： 电压转换器，用于连接TTL和CMOS电路
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申请号： US808752申请日： 1977-06-22
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公开(公告)号： US4128775A公开(公告)日： 1978-12-05
- 发明人: Thomas M. Frederiksen , James B. Cecil
- 申请人： Thomas M. Frederiksen , James B. Cecil
- 申请人地址： CA Santa Clara
- 专利权人： National Semiconductor Corporation
- 当前专利权人： National Semiconductor Corporation
- 当前专利权人地址： CA Santa Clara
- 主分类号： G05F3/20
- IPC分类号： G05F3/20 ; H03K19/003 ; H03K19/0185 ; H03K17/60 ; H03K1/02 ; H03K1/14 ; H03K19/08
摘要：
The invention described herein is an interface circuit which effectively allows TTL output voltages to fall within the range of CMOS input thresholds. The interface circuit contains bipolar and FET devices connected to generate an input voltage threshold which is equal to two base-emitter voltage drops. The interface circuit also includes a switching circuit portion which comprises one P-channel MOS transistor connected to one N-channel MOS transistor.
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