发明授权
- 专利标题： Input buffer for multiple differential I/O standards
- 专利标题（中）： 用于多个差分I / O标准的输入缓冲器
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申请号： US10056367申请日： 2002-01-25
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公开(公告)号： US06825692B1公开(公告)日： 2004-11-30
- 发明人: Jonathan Chung , In Whan Kim , Philip Pan , Chiakang Sung , Bonnie Wang , Xiaobao Wang , Yan Chong , Gopinath Rangan , Khai Nguyen , Tzung-Chin Chang , Joseph Huang
- 申请人： Jonathan Chung , In Whan Kim , Philip Pan , Chiakang Sung , Bonnie Wang , Xiaobao Wang , Yan Chong , Gopinath Rangan , Khai Nguyen , Tzung-Chin Chang , Joseph Huang
- 主分类号： H03K190175
- IPC分类号： H03K190175
摘要：
An input buffer circuit has a plurality of selectively enabled differential amplifier circuits, where each differential amplifier is configured for compatibility with a particular differential I/O standard and its corresponding input operating range. For example, the input buffer may have two differential amplifiers suitable for receiving LVDS differential input signals over a wide input operating range, and another differential amplifier suitable for receiving the PCML differential input signals. One or more control signals are provided to the input buffer, e.g., programmably, to selectively enable the required differential amplifier(s) for a given I/O standard.
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