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Anti-interference circuit of tuner

A tuner and anti-interference technology, applied in the circuit field, can solve problems such as tuner interference and affect the strength of the tuner, and achieve the effect of preventing interference

Inactive Publication Date: 2013-10-30
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the central processing unit of electronic products will generate electromagnetic waves when it is working, which will cause interference to the tuner, which will affect the strength of the tuner to receive external signals

Method used

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  • Anti-interference circuit of tuner

Examples

Experimental program
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Embodiment Construction

[0012] see figure 1 , is a block diagram of a preferred embodiment of the tuner anti-jamming circuit 1 . The tuner anti-jamming circuit 1 includes a power control system 10 , a first switch 20 and a second switch 30 . The first switch 20 is connected between the power control system 10 and a central processing unit 40 for turning on or off the connection between the power control system 10 and the central processing unit 40 . The second switch 30 is connected between the power control system 10 and a tuner 50 for turning on or off the connection between the power control system 10 and the tuner 50 . The power control system 10 is independent of the CPU 40 , so when the power control system 10 is connected to an external power source 60 , the power control system 10 can work normally when the CPU 40 is not working. Wherein, when the tuner 50 works, the power control system 10 outputs a high-level signal to the first switch 20, and simultaneously outputs a low-level signal to ...

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PUM

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Abstract

An anti-interference circuit of a tuner comprises a power supply control system, a first switch and a second switch, wherein the first switch is used for connecting or disconnecting the power supply control system with a central processing unit, and the second switch is used for connecting or disconnecting the power supply control system with the tuner. The power supply control system is independent from the central processing unit. When the tuner is switched to a work state, the power supply control system outputs a high-level signal to the first switch, the first switch disconnects the power supply control system with the central processing unit according to the high-level signal output by the power supply control system, the power supply control system further outputs a low-level signal to the second switch, and the second switch connects the power supply control system with the tuner according to the low-level signal output by the power supply control system so as to prevent interference to the tuner.

Description

technical field [0001] The invention relates to a circuit, in particular to a tuner anti-interference circuit. Background technique [0002] At present, general electronic products will have a tuner to receive external signals. However, the central processing unit of electronic products will generate electromagnetic waves when working, which will cause interference to the tuner, and then affect the strength of the tuner to receive external signals. Contents of the invention [0003] In view of this, an anti-interference circuit for a tuner is provided, which can prevent the tuner from being interfered. [0004] An anti-jamming circuit for a tuner, the circuit includes: a power control system; a first switch, the first switch is connected between the power control system and a central processing unit, and is used to turn on or cut off the power control system connection with the central processing unit; and a second switch, the second switch is connected between the power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03J5/24
CPCH03J5/24H04B15/02
Inventor 任东亮高行嵩
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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