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Tuner for receiving digital broadcast

A technology for receiving digital and tuners, applied in the field of tuners, which can solve problems such as difficulty in finding out the cause of accidents, breakdown, breakdown of internal components, etc.

Inactive Publication Date: 2005-03-09
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, if a soldering bridge is created between the power supply pin 1c that supplies 32V DC power and the power supply pin 1b or 1d, then even if the BS digital broadcast receiving tuner is normal before installation, then disadvantageously, unwanted Excessive voltage can still surge into the BS digital broadcast receiver tuner, causing its internal components to be broken down or the equipment installed with the BS digital broadcast receiver tuner to be broken down
[0019] In this case, the disadvantage is that although the BS digital radio reception tuner was normal before installation, it is relatively difficult to find out the cause of the accident

Method used

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  • Tuner for receiving digital broadcast
  • Tuner for receiving digital broadcast
  • Tuner for receiving digital broadcast

Examples

Experimental program
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Effect test

Embodiment Construction

[0031] figure 1 , 2 , 3 shows a tuner for receiving digital broadcasting applying the present invention. figure 1 , 2 , the reference numbers in 3, and the Figure 4 and 5 Those reference numerals already used in indicate the same or corresponding components. attached figure 2 and 3 Shown are the side and top profiles of the BS digital broadcast receiver tuner and also show the Figure 4 A shield case 1 for a tuner circuit for receiving BS digital broadcasting.

[0032] refer to figure 1 , the BS digital broadcast signal received through the BS antenna or the like is supplied to the input terminal 2. The BS digital broadcasting signal obtained by the input terminal 2 is provided to the adjustable attenuator 4 through the amplifying circuit 3 . For example, the 5V DC power applied to the power pin 1 a serves as a power supply for the amplifying circuit 3 .

[0033] The adjustable attenuator 4 is controlled by the signal level obtained at the QPSK / 8PSK demodulation ...

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PUM

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Abstract

A tuner for receiving a digital broadcast is disclosed which prevents application of an unexpected excessively high voltage to a power supply pin or the like upon inspection or adjustment or after it is assembled into a set. The digital broadcast receiving tuner includes a channel selection section, a demodulation section, and a plurality of terminal pins electrically connected to the channel selection section and the demodulation section and including a power supply pin. The terminal pins further include a grounding pin disposed on at least one side of the power supply pin.

Description

technical field [0001] The present invention relates to a tuner for receiving digital broadcasts. Background technique [0002] Conventionally, various tuners for receiving BS (Broadcasting Satellite) digital broadcasts have been proposed, Figure 4 and Figure 5 One of these tuners is shown. Figure 5 Shown is the appearance of the BS digital broadcasting receiving tuner. see Figure 5 , the shown BS ​​digital broadcasting receiving tuner includes a shielding housing 1, for example, in this housing is provided such as Figure 4 The tuner circuit shown. [0003] see Figure 4 , the shown tuner circuit includes an input terminal 2 to which a BS digital broadcast signal received through a BS antenna or the like is supplied. The BS digital broadcasting signal obtained at the input terminal 2 is supplied to the adjustable attenuator 4 through the amplifying circuit 3 . For example, the 5V DC power applied to the power supply pin 1a serves as the power supply for the amplify...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K7/04H04B1/08H04N5/44H04N5/50H04N5/64H05K9/00
CPCH04N21/426H04N5/50H04N5/4446H04N5/44H05K7/04H05K9/00
Inventor 藤原央细井雅敬
Owner SONY CORP