发明申请
US20060068748A1 Communication semiconductor integrated circuit and radio communication system
审中-公开
通信半导体集成电路和无线电通信系统
- 专利标题： Communication semiconductor integrated circuit and radio communication system
- 专利标题（中）： 通信半导体集成电路和无线电通信系统
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申请号： US11176302申请日： 2005-07-08
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公开(公告)号： US20060068748A1公开(公告)日： 2006-03-30
- 发明人: Kiyoshi Irie , Kazuaki Hori , Hiroshi Mori , Stephen Goodwin
- 申请人： Kiyoshi Irie , Kazuaki Hori , Hiroshi Mori , Stephen Goodwin
- 优先权： GB0421621.4 20040929
- 主分类号： H04B1/40
- IPC分类号： H04B1/40 ; H04B1/28 ; H04M1/00
摘要：
A direct upconversion system communication semiconductor integrated circuit includes a frequency converter circuit for up-converting a transmission signal and a notch filter located at a subsequent stage of the frequency converter circuit. The notch filter is served to cut off at least third-order harmonics of a local signal.
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