发明授权
US07425995B2 Tuner using a direct digital frequency synthesizer, television receiver using such a tuner, and method therefor
有权
使用直接数字频率合成器的调谐器，使用这种调谐器的电视接收机及其方法
- 专利标题： Tuner using a direct digital frequency synthesizer, television receiver using such a tuner, and method therefor
- 专利标题（中）： 使用直接数字频率合成器的调谐器，使用这种调谐器的电视接收机及其方法
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申请号： US11018474申请日： 2004-12-21
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公开(公告)号： US07425995B2公开(公告)日： 2008-09-16
- 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： H04N5/44
- IPC分类号： H04N5/44
摘要：
A television tuner (920) is adapted for use in a television receiver (900) that receives a radio frequency (RF) signal from an input device (910) and outputs audio and video information from a selected channel in response thereto. The television tuner (920) includes a direct digital frequency synthesizer (206) and a mixer (220). The direct digital frequency synthesizer (206) has an output for providing a digital representation of a mixing signal. The mixer (220) has a signal input for receiving a television signal, a mixing input coupled to the output of said direct digital frequency synthesizer (206), and an output for providing an intermediate frequency (IF) television signal.
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