With the increasing demand for high quality TV service, digital television (DTV) is
replacing the conventional analog television. DTV tuner is one of the most critical blocks
of the DTV receiver system; it down-converts the desired DTV RF channel to baseband or
a low intermediate frequency with enough quality. This research is mainly focused on the
analysis and realization of low-cost low-power front-ends for ATSC terrestrial DTV and
DVB-H mobile DTV tuner systems.
For the design of the ATSC terrestrial tuner, a novel double quadrature tuner architecture,
which can not only minimize the tuner power consumption but also achieve the fully
integration, has been proposed. A double quadrature down-converter has been designed and
fabricated with TSMC 0.35õm CMOS technology; the measurement results verified the
proposed concepts.
For the mobile DTV tuner, a zero-IF architecture is used and it can achieve the DVB-H
specifications with less than 200mW power consumption. In the implementation of the
mobile DVB-H tuner, a novel RF variable gain amplifier (RFVGA) and a low flicker noise current-mode passive mixer have been proposed. The proposed RFVGA achieves high
dynamic range and robust input impedance matching performance, which is the main
design challenge for the traditional implementations. The current-mode passive mixer
achieves high-gain, low noise (especially low flicker noise) and high-linearity (over 10dBm
IIP3) with low power supplies; it is believed that this is a promising topology for low
voltage high dynamic range mixer applications. The RFVGA has been fabricated in TSMC
0.18õm CMOS technology and the measurement results agree well with the theoretical
ones.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/5918 |
| Date | 17 September 2007 |
| Creators | Xiao, Jianhong |
| Contributors | Silva-Martinez, Jose |
| Publisher | Texas A&M University |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Dissertation, text |
| Format | 2036637 bytes, electronic, application/pdf, born digital |
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