Integrated tuner for satellite and terrestrial broadcast reception

A technology of terrestrial broadcasting and satellite broadcasting, applied to parts of color TV, parts of TV system, TV, etc., which can solve problems such as bad characteristics and not involving multiple tuner circuits

Inactive Publication Date: 2006-08-09
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these inventions do not involve multiple tuner circuits
Therefore, the tuners disclosed in Japanese Patent Application Laid-Open Nos. H3-46827 and H7-38827 do not have bad characteristics caused by interference of distortion between the oscillating signal and the tuner circuit

Method used

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  • Integrated tuner for satellite and terrestrial broadcast reception
  • Integrated tuner for satellite and terrestrial broadcast reception
  • Integrated tuner for satellite and terrestrial broadcast reception

Examples

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Embodiment Construction

[0020] figure 1 The configuration of the satellite and terrestrial broadcast reception integrated tuner of the first embodiment of the present invention is schematically shown. exist figure 1 , also appearing in Figure 6 Parts in are identified by common numerals and symbols, and detailed explanations will not be repeated here.

[0021] Such as figure 1 The satellite and terrestrial broadcast reception integrated tuner of the first embodiment of the present invention shown has a satellite broadcast reception tuner circuit 2A and a terrestrial reception tuner circuit 3 housed in a shield case 1 .

[0022] Satellite broadcast receiving tuner circuit 2A is connected to RF input terminal 4 and output terminals 8 and 9 , and includes HPF 5 , RF amplifier 6 , filter circuit 15 and quadrature detection circuit 7 . The input signal fed through the RF input terminal 4 is first eliminated components other than high frequency by the HPF 5, and then amplified by the RF amplifier 6,...

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Abstract

A satellite and terrestrial broadcast reception integrated tuner of the invention includes a satellite broadcast reception tuner circuit and a terrestrial broadcast reception tuner circuit. The satellite broadcast reception tuner circuit includes a filter circuit that attenuates a signal having a frequency lower than the satellite broadcast reception band and a quadrature detection circuit to which the output of the filter circuit is directly inputted. With this configuration, the interference of the terrestrial broadcast reception tuner circuit with the satellite broadcast reception tuner circuit is reduced.

Description

field of invention [0001] The present invention relates to an integrated tuner having a satellite broadcast receiving tuner circuit and a terrestrial broadcast receiving tuner circuit. Background technique [0002] Usually, a satellite broadcast reception tuner and a terrestrial reception tuner are units provided separately. As television receivers and devices are made more and more compact, there are integrated tuners for satellite and terrestrial broadcast reception that integrate the above two types of tuners into a single unit (see, for example, Japanese Patent Application Laid-Open No. H3-46827). A conventional integrated tuner for satellite and terrestrial broadcast reception will now be described. [0003] Figure 6 is a diagram schematically showing an example of a conventional satellite and terrestrial broadcast integrated tuner configuration. Such as Figure 6 The shown conventional satellite and terrestrial broadcast reception integrated tuner has a satellite b...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H04B1/16H04B1/10H04B1/18H04N5/44
CPCH04N5/46H04N7/20H04N21/4263H04N21/6112H04N21/6143
Inventor家岛祐一
OwnerSHARP KK