Tuner and Front-end Circuit Thereof
First Claim
Patent Images
1. A tuning circuit, comprising:
- a transformer, for converting a single-end signal to a differential signal;
a first path, comprising a first filter circuit; and
a second path, comprising a second filter circuit;
wherein, the first filter circuit and the second filter circuit are electrically connected to an output end of the transformer.
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Accused Products
Abstract
A tuner includes a plurality of paths, and at least one of the paths includes a front-end filter circuit, an amplifier, and a trace filter. The trace filter includes a varactor and an inductor, which are coupled to an output end of the amplifier. Further, the amplifier and the varactor of the tuner are packed in a complementary metal-oxide semiconductor (CMOS) chip.
51 Citations
20 Claims
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1. A tuning circuit, comprising:
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a transformer, for converting a single-end signal to a differential signal; a first path, comprising a first filter circuit; and a second path, comprising a second filter circuit; wherein, the first filter circuit and the second filter circuit are electrically connected to an output end of the transformer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A tuner, comprising:
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a first path; a second path, comprising; a front-end filter circuit; a differential amplifier, coupled to the front-end filter circuit; and a trace filter, comprising; a varactor, coupled to two output ends of the differential amplifier, and an inductor, coupled to the varactor in parallel; wherein the amplifier and the varactor are integrated in a complementary mental-oxide semiconductor (CMOS) chip. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A tuner, comprising:
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a plurality of paths, at least one of the paths comprising; a front-end filter circuit; an amplifier, coupled to the front-end filter circuit; and a trace filter, comprising; a varactor, coupled to a ground end and an output end of the amplifier; and an inductor, coupled to the varactor in parallel; wherein, the amplifier and the varactor are integrated in a single chip, and the inductor is externally connected to the chip. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification