发明授权
US07447493B2 Tuner suitable for integration and method for tuning a radio frequency signal
有权
适用于调谐器的调谐器和调谐射频信号的方法
- 专利标题： Tuner suitable for integration and method for tuning a radio frequency signal
- 专利标题（中）： 适用于调谐器的调谐器和调谐射频信号的方法
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申请号： US10377573申请日： 2003-02-28
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公开(公告)号： US07447493B2公开(公告)日： 2008-11-04
- 发明人: Richard A. Johnson
- 申请人： Richard A. Johnson
- 申请人地址： US TX Austin
- 专利权人： Silicon Laboratories, Inc.
- 当前专利权人： Silicon Laboratories, Inc.
- 当前专利权人地址： US TX Austin
- 代理机构： Larson Newman Abel Polansky & White, LLP
- 主分类号： H04B1/16
- IPC分类号： H04B1/16 ; H04B1/18 ; H03D1/00 ; H04N5/44
摘要：
A tuner (200) includes a direct digital frequency synthesizer (206) and a mixer (220). The direct digital frequency synthesizer (206) has an output terminal for providing a digital local oscillator signal having a frequency chosen to mix a desired channel to baseband. The mixer (220) has a first input terminal for receiving a tuned radio frequency signal, a second input terminal coupled to the output terminal of the direct digital frequency synthesizer (206), and an output terminal for providing an in-phase baseband signal.
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