Tuner and front-end circuit thereof

摘要

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.

主权项

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; a second path, comprising a second filter circuit; and a third path, comprising a third filter circuit; wherein, the first filter circuit, the second filter circuit and the third filter circuit are electrically connected to an output end of the transformer, the first filter circuit is a low-pass filter, the second filter circuit is a high-pass filter, and the third filter circuit is a band-pass filter.