发明申请
- 专利标题： System and method for providing a single-ended receive portion and a differential transmit portion in a wireless transceiver
- 专利标题（中）： 用于在无线收发器中提供单端接收部分和差分发射部分的系统和方法
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申请号： US10975375申请日： 2004-10-29
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公开(公告)号： US20060094357A1公开(公告)日： 2006-05-04
- 发明人: John McCorkle
- 申请人： John McCorkle
- 专利权人： FREESCALE SEMICONDUCTOR INC.
- 当前专利权人： FREESCALE SEMICONDUCTOR INC.
- 主分类号： H04B7/00
- IPC分类号： H04B7/00
摘要：
In an input/output circuit (200), a differential balun (250) is provided that has first and second balun inputs and first and second balun outputs. An antenna (230) is connected to the first and second balun outputs. A differential amplifier (220) has one output connected to the first balun input, and a second output connected to the second balun input, while a single-ended amplifier (110) has its input connected to the first balun input. A grounding switch (240) is connected between the second balun input and ground. During a transmit mode the grounding switch (240) is open, the differential amplifier (220) is turned on, and the single-ended amplifier (110) is turned off. During a receive mode the grounding switch (240) is closed, the differential amplifier (220) is turned off, and the single-ended amplifier (110) is turned on.
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