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Television tuner and manufacturing method thereof

A TV tuner, tuner technology, applied in the direction of TV, color TV, color TV parts, etc., to achieve the effect of reducing volume

Inactive Publication Date: 2011-12-14
HIMAX TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]Due to the rapid development of mobile digital TV, the requirements for small digital TV and set-top boxes are increasing day by day. However, the air-core coils used in TV tuners not only require large The space and printed circuit board area require manual plug-in, which increases the production cost, and its large size also makes it difficult to mobilize digital TV.

Method used

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  • Television tuner and manufacturing method thereof
  • Television tuner and manufacturing method thereof
  • Television tuner and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0106] Please refer to Figure 3A , which shows a circuit diagram of the UHF impedance matching circuit 109 according to a preferred embodiment of the present invention. The UHF impedance matching circuit 109 includes a second low temperature co-fired ceramic inductor 305a, a second varactor diode 313a and a capacitor 307a. Wherein, the second varactor diode 313a is connected in series with the capacitor 307a, and the second low temperature co-fired ceramic inductor 305a is connected in parallel with the second varactor diode 313a and the capacitor 307a in series. In addition, the UHF impedance matching circuit 109 further includes several resistors and other capacitors, electrically connected to the second low temperature co-fired ceramic inductor 305a, the second varactor diode 313a and the capacitor 307a.

[0107] like Figure 3B As shown, it shows the frequency response of the UHF impedance matching circuit 109, due to the difference between the inductance value of the s...

Embodiment 2

[0112] Please refer to Figure 5A, which shows the circuit of the UHF impedance matching circuit 115 . Wherein, the second varactor diode 509a in the UHF impedance matching circuit 115 is connected in series with the capacitor 507a, and the second low temperature co-fired ceramic inductor 503a is connected in parallel with the second varactor diode 509a and the capacitor 507a in series. The UHF impedance matching circuit 115 further includes several resistors and other capacitors, electrically connected to the second low temperature co-fired ceramic inductor 503a, the second varactor diode 509a, and the capacitor 507a.

[0113] like Figure 5B As shown, it shows the frequency response of the UHF impedance matching circuit 115. Since the inductance value of the second low temperature co-fired ceramic inductor 503a is proportional to the frequency of the maximum gain of the UHF impedance matching circuit 115, it can be By adjusting the inductance value of the second low temper...

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PUM

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Abstract

The invention discloses a TV tuner that includes an extremely-high / ultra-high frequency tracking filter, an extremely-high / ultra-high frequency impedance matching circuit and a conversion tuner of an integrated circuit. The extremely-high / ultra-high frequency tracking filter includes a first co-firing ceramic inductor in low temperature, a first variable capacitance diode and a fine tuner which are electrically connected to determine the oscillation frequency of the extremely-high / ultra-high frequency tracking filter; and the extremely-high / ultra-high frequency impedance matching circuit includes a second co-firing ceramic inductor in low temperature, a second variable capacitance diode and the capacitor which are electrically connected to determine the oscillation frequency of the extremely-high / ultra-high frequency impedance matching circuit.

Description

technical field [0001] The present invention relates to a TV tuner device and method, and in particular to a UHF / UHF TV tuner device or method. Background technique [0002] With the advancement of communication technology and compression technology, television broadcasting has been gradually replaced by digital television broadcasting from analog television broadcasting. The transformation of digital broadcasting has driven the rapid development of related industries. Digital TV and set-top boxes (Set-Top-Box, STB) are one of them. pivotal position. Tuner, commonly known as a channel selector, its function is to amplify the received radio frequency signal first, then select the desired channel and filter out the unwanted channels, so as to avoid the unwanted channels from interfering with the desired channels during the down-frequency process, and then This filtered RF signal is then down-converted to the mid-frequency range. [0003] Due to the rapid development of mob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/50
Inventor 何文博
Owner HIMAX TECH LTD