TV tuners and methods thereof
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United States of America Patent
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-
Jan 1, 2008
Grant Date -
Jun 9, 2005
app pub date -
Nov 30, 2004
filing date -
Dec 5, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
TV tuners and methods thereof are provided. A TV tuner includes a first frequency converting circuit, a second frequency converting circuit, and a demodulator. The first frequency converting circuit, switchable between a first operating mode and a second operating mode, receives an RF signal and outputs a converted signal by performing high-side injection on the RF signal in the first operating mode and performing frequency addition on the RF signal in the second operating mode. The second frequency converting circuit performs a down conversion on the converted signal from the first frequency converting circuit to obtain an intermediate frequency signal. The demodulator demodulates the intermediate frequency signal and outputs a baseband frequency signal comprising video and audio signals.
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