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Noise canceller as well as high-frequency receiver and portable device each using the same

A technology of noise elimination and receiver, applied in the parts of color TV, parts of TV system, TV, etc., can solve the problems of inability to watch TV broadcast and poor reception sensitivity.

Inactive Publication Date: 2009-08-05
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, when receiving terrestrial digital TV, in the case of poor radio wave conditions, the reception sensitivity deteriorates, and it may not be possible to watch TV broadcasts

Method used

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  • Noise canceller as well as high-frequency receiver and portable device each using the same
  • Noise canceller as well as high-frequency receiver and portable device each using the same
  • Noise canceller as well as high-frequency receiver and portable device each using the same

Examples

Experimental program
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Effect test

Embodiment approach 1

[0068] Next, use figure 1 Embodiment 1 of the present invention will be described. figure 1 It is a block diagram of the mobile device in Embodiment 1 of the present invention. In this embodiment, a portable device 101 capable of receiving a digital television signal using a UHF (Ultra High Frequency) frequency band will be described.

[0069] The portable device 101 includes a high-frequency receiver 103 that receives a digital television signal from a television reception antenna 117 . In addition, the mobile device 101 includes a main body 105 having functions such as a mobile phone, a portable game machine, a portable computer, and a portable dictionary. In addition, the portable device 101 includes a baseband signal processing unit 107 connected to the output of the high-frequency receiver 103 and the output of the main body unit 105 , respectively. Furthermore, the mobile device 101 includes an image display unit 109 and an audio output unit 111 to which a signal from...

Embodiment approach 2

[0122] Next, use figure 1 as well as Figure 5A , Figure 5B , Embodiment 2 of the present invention will be described. Figure 5A It is a perspective view of the mobile device in Embodiment 2 of the present invention seen from the side. Figure 5B It is a perspective view of each functional block of the mobile device according to Embodiment 2 of the present invention seen from above. The portable device 161 of this embodiment and Figure 2A , Figure 2B The difference between the illustrated portable device 101 is that the portable device 161 of this embodiment connects between the pickup antenna 144 and the cancellation signal generation circuit 163 with balance circuits 230a and 230b. The mobile device 161 includes a high-frequency receiver 162 connected to the television receiving antenna 117 and the pickup antenna 144 . The high-frequency receiver 162 is provided with input terminals 231a and 231b respectively connected to the balance circuits 230a and 230b. In add...

Embodiment approach 3

[0129] Below, use figure 1 as well as Figure 6A , Figure 6B Embodiment 3 of the present invention will be described. Figure 6A It is a perspective view of each functional block of the mobile device in Embodiment 3 of the present invention viewed from the side. Figure 6B It is a perspective view of each functional block of the mobile device in Embodiment 3 of the present invention seen from above. The portable device 301 of this embodiment and Figure 2A , Figure 2B The difference between the illustrated portable device 101 is that in the portable device 301 of this embodiment, one end 144b of the pickup antenna 144 is connected to the ground.

[0130] The mobile device 301 includes a high-frequency receiver 303 connected to the television receiving antenna 117 and the pickup antenna 144 . In addition, the noise canceling device 305 is constituted by the pickup antenna 144 and the noise canceling unit 137 . One end 144b of the pickup antenna 144 is connected to, for...

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PUM

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Abstract

A noise canceller of this invention includes a pickup antenna arranged in proximity to a noise signal generation source to extract a noise signal generated by the noise signal generation source, and a noise cancellation unit having a first input for receiving a television signal from a television signal receiving antenna and a second input for receiving the noise signal extracted by the pickup antenna. Herein, the noise cancellation unit removes a noise signal fed from the television signal receiving antenna. Thus, the noise canceller prevents degradation in television signal reception sensitivity due to the noise signal generated by the noise signal generation source.

Description

technical field [0001] The present invention relates to a noise canceling device for a portable phone, a portable game machine, a portable computer, a portable dictionary, etc., a high-frequency receiver using the same, and a portable device. Background technique [0002] In recent years, with the miniaturization of components and the integration of semiconductor elements, such portable devices have become very lightweight and compact. For this reason, attempts to continuously enrich the functions of portable devices are also being actively carried out. [0003] As a result, the portable device has functions such as a mobile phone, a portable game machine, a portable computer, and a portable dictionary, and can also watch TV broadcasts (Patent Document 1). [0004] However, there is a problem in conventional portable devices that a part of the clock signal output from the portable device and its harmonic signal becomes noise and enters from the antenna for television recept...

Claims

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Application Information

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IPC IPC(8): H04N5/21H04N5/44H04N5/50H04N5/00
Inventor 藤岛明伊藤秀行松井宜一北村浩一安田雅克佐藤祐己
Owner PANASONIC CORP