| 摘要 |
PROBLEM TO BE SOLVED: To provide a low noise, high linearity TV tuner with a switched fixed-gain low noise amplifier (LNA). SOLUTION: A TV tuner includes a plurality of amplifiers having inputs for coupling to an antenna, a plurality of filters having inputs coupled to outputs of the plurality of amplifiers, and a first multiplexer having inputs coupled to outputs of the plurality of filters, the first multiplexer for selecting an output of one of the filters. The TV tuner further includes a mixer having an input coupled to an output of the first multiplexer, and an output amplifier having an input coupled to an output of the mixer and an output for providing output of the TV tuner. COPYRIGHT: (C)2007,JPO&INPIT
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