201015951 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種電子裝置之消磁電路。 【先前技術】201015951 IX. Description of the Invention: [Technical Field] The present invention relates to a degaussing circuit of an electronic device. [Prior Art]
隨著移動通訊技術之高速發展，手機已經在全球得到 了迅速之發展和普及，手機之發展和普及在很大程度上方 便了人們之生活。對—般人來說，手機確實給他們帶來很 大之方便。但在我們之生活中還存在一部分聽力障礙之 人，他們必須通過佩戴助聽器才能達到正常人之聽力。 然而，有些助聽器佩戴者不能直接接聽手機。這是因 為當助聽器佩戴者把手機置於頭部接聽電話時，手機周圍 ^身會產生-磁場’若磁場過強會於助聽器中產生幹擾噪 音，從而影響助聽器佩戴者正常接聽手機。 〃 【發明内容】With the rapid development of mobile communication technology, mobile phones have been rapidly developed and popularized around the world, and the development and popularization of mobile phones have largely facilitated people's lives. For ordinary people, mobile phones really bring them great convenience. However, there are still some hearing-impaired people in our lives. They must wear hearing aids to achieve normal human hearing. However, some hearing aid wearers cannot directly answer the phone. This is because when the hearing aid wearer puts the mobile phone on the head to answer the call, the body will generate a magnetic field around the mobile phone. If the magnetic field is too strong, it will cause interference noise in the hearing aid, thus affecting the hearing aid wearer to answer the mobile phone normally. 〃 【Contents】
有鑒於此’有必要提供一 置之消磁電路。 種可減小磁場幹擾之電子裝 -種電子裝置之消磁電路包括—濾波器及—音頻播放 =路，=波器包括第—輸人端、第—輸出端及第二輸出 頻播以路包括一音頻播放器，該音頻播放器包 訊號端與第二訊號端。該第_ =::接收訊號，以驅動音頻播放器;:聲= 生電路二電Γ 一步包括一磁場發生電路，該磁場發 電阻：弟二輸入端、第三輸出端、-線圈組，-第--弟二電阻、一第一貼片電阻、一第二貼片電阻、 201015951 一第四輸入端及一第四輸出端。該線圈組包括第一線圈、 第二線圈、第一連接端及第二連接端，該第一線圈與第二 線圈繞向相同且並行排列。該第一線圈連接於第一連接端 與第二連接端之間。該第二線圈連接於第一連接端與第二 貼片電阻之間。該第三輸入端分別連接至濾波器之第一輸 出端、線圈組之第一連接端及音頻播放器之第一訊號端。 該第四輸入端分別連接至濾波器之第一輸出端及線圈組之 第二連接端。該第一電阻連接於第三輸入端及第一連接端 之間。述第二電阻連接於第二連接端與第三輸出端之間， 該第一貼片電阻連接於第四輸入端與第二連接端之間，該 第二貼片電阻連接於第二線圈組與第四輸出端之間。 相較於先前技術，該電子裝置之消磁電路利用磁場發 生電路之通電線圈組產生與電子裝置本身產生之磁場方向 相反之磁場，該兩個相反方向之磁場相互抵消，以達到消 磁之目之。 〇 【實施方式】 以下將結合附圖對本發明作進一步之詳細說明。 圖1為本發明較佳實施方式提供之電子裝置之消磁電 路100，用於為電子裝置減少磁場幹擾。本實施方式中，該 電子裝置以手機為例。實際應用中，也可為收音機、對講 機等。該電子裝置之消磁電路100包括依次電性連接之滤 波器10、一高頻濾波電路20、一磁場發生電路3〇、一音頻 播放電路40。 該濾波器10包括一第一輸入端II、一第二輸入端12、 201015951 一第一輸出端01、一第二輸出端〇2及一接地端。本實施 方^中，《波器10為-帶通濾波器，其通頻帶與音頻塑 應範圍相同’即為20HZ-20KHZ。 曰 該高頻濾波電路20包括第一電容C1、第二電容c2。 該第-電容C1—端連接至濾波器ig之第—輸出端另 「:接地:形：回路。該第二餘C2 一端連接至渡波器 之第一輸人端12 ’另—端接地以形成回路。該高頻滤波 電路20用於濾除高頻幹擾訊號。 “ 該磁場發生電路30包括—第—貼片電阻Ru、 貼片電阻M2、一第三輸入端13、一第三輸出端〇3、一； =端14、一第四輸出端〇4 一第一電…一線圈組 L及第二電阻R2。該線圈組[包括一第一線圈 ❹ 圈L2、第-連接端31及第二連接端％。該第四輸入端… 第四輸出端04分別連接至第一電容C1、第二電容c2。該 第-電阻R1連接於第—連接端31與第三輸人端i3之間: 該第二電阻R2連接於該第二連接端％與第三輸出端⑴ 之間。該第-貼片電阻R11連接於第一電容。與 端32之間。該第二貼片電阻㈣連接於該第—電阻^與 第四輸出端〇4之間。該第—貼片電阻Rn之阻值遠小於該 第-電阻Ri之阻值，該第二貼片電阻R12之阻值遠小於； 二電阻R2之阻值。本實施方式中，該第—線圈u與第二 線圈L2繞向相同且並行排歹，卜該第一線圈_接於第= 電阻R1與第—電阻R2之間’該第二線圈L2連接於第— 電阻R1與第二貼片電阻R12之間。 201015951 本實施方式中，該音頻播放電路40包括一第一分壓電 阻R3、第一分壓電阻R4及一音頻播放器41。該音頻播放 器41包括一第-訊號端42及一第二訊號端43。該磁場發 生電路30之第二輸入端13經由該第—分壓電阻R3連接至 該第-訊號端42。該第三輸出端〇3經由該第二分壓電阻 R4連接至該第二訊號端43。 ❹ ❹ 田第貼片電阻RU與第二貼片電阻R12均斷開時， 該濾波器10之第一輸入端u接收一音頻訊號S1，經該濾 ，器ίο濾'波後’從第一輸出端01輸出至第一電容ci進行 南頻遽波，濾、除高頻幹擾訊號後於第三輸入端13分流，一 路經第-分壓電阻R3後輸入至音頻播放器41之第一訊號 端42以驅動該音頻播放器41發出聲響；另—路經第一電 阻R1輸入至線圈組L之第一連接端31，訊號經第一線圈 一後、盈第一電阻R2、第二輸出端〇3、第四輸出端及第 2容C2輸人至滤波器1G之第二輸出端i2形成一訊號回 /再經m ig之第二輸出端Q2輸人至其他電路或處 王山晶片（圖未示）做進一步處理。此時，訊號從第三輸入 經第-電阻R1再經第一線圈L1，經第三輸出端〇3 輸出，線圈組L之第一線圈LU產生一方向之磁場。 當第-貼片電阻R11與第二貼片電阻組均接通時， 二頻訊號S1，經該渡波器10渡波後，通過第一輸出端〇1 ^出至m C1進行高_波後訊號從磁場發生電路 32;!四輸入端：輸入至第二連接端32並於第二連接端 刀〜，一路經弟二電阻R2輸至第三輸出端03再經第二 11 201015951 ，阻R4後輸入至音頻播放器41之第二訊號端43以驅 =頻播放器41發出聲響，另-路輸入至線圈組L，訊 二：_ 一線圈U經第-連接端31輸入至第二線圈L2,再 、=二貼片電阻R12、第四輸出端〇4及第二電容c2輸入 1G之第—輸出端12形成一訊號回路或再經遽波 —輸出端02輪人至其他電路或處理晶片（圖未示） ™ T1 _ 此f，由於訊號從第四輸入端I4經第一線 ΟIn view of this, it is necessary to provide a degaussing circuit. The degaussing circuit of the electronic device-type electronic device capable of reducing magnetic field interference comprises: a filter and an audio playback channel, and the wave device includes a first input terminal, a first output terminal and a second output frequency broadcast path. An audio player, the audio player includes a signal end and a second signal end. The first _ =:: receives the signal to drive the audio player; the sound = the circuit of the second circuit includes a magnetic field generating circuit, the magnetic field generating resistor: the second input terminal, the third output terminal, the - coil group, - a second-second resistor, a first chip resistor, a second chip resistor, a 201015951 fourth input terminal and a fourth output terminal. The coil assembly includes a first coil, a second coil, a first connection end, and a second connection end, the first coil and the second coil being wound in the same direction and arranged in parallel. The first coil is connected between the first connection end and the second connection end. The second coil is connected between the first connection end and the second chip resistor. The third input terminal is respectively connected to the first output end of the filter, the first connection end of the coil set, and the first signal end of the audio player. The fourth input is coupled to the first output of the filter and the second connection of the coil set, respectively. The first resistor is connected between the third input end and the first connection end. The second resistor is connected between the second connection end and the third output end, the first chip resistor is connected between the fourth input end and the second connection end, and the second chip resistor is connected to the second coil group Between the fourth output and the fourth output. Compared with the prior art, the degaussing circuit of the electronic device uses the energized coil set of the magnetic field generating circuit to generate a magnetic field opposite to the direction of the magnetic field generated by the electronic device itself, and the two opposing magnetic fields cancel each other to achieve the purpose of demagnetization. [Embodiment] Hereinafter, the present invention will be further described in detail with reference to the accompanying drawings. 1 is a degaussing circuit 100 for an electronic device according to a preferred embodiment of the present invention for reducing magnetic field interference for an electronic device. In this embodiment, the electronic device takes a mobile phone as an example. In practical applications, it can also be a radio, a walkie-talkie, and the like. The degaussing circuit 100 of the electronic device includes a filter 10 electrically connected in sequence, a high frequency filter circuit 20, a magnetic field generating circuit 3A, and an audio playback circuit 40. The filter 10 includes a first input terminal II, a second input terminal 12, a 201015951 first output terminal 01, a second output terminal 〇2, and a ground terminal. In the embodiment, the wave device 10 is a band-pass filter whose passband is the same as the audio plastic range, which is 20HZ-20KHZ. The high frequency filter circuit 20 includes a first capacitor C1 and a second capacitor c2. The first capacitor C1 - terminal is connected to the first output terminal of the filter ig ": ground: shape: loop. The second remaining C2 end is connected to the first input end 12 of the ferropole and the other end is grounded to form The high frequency filter circuit 20 is configured to filter out the high frequency interference signal. The magnetic field generating circuit 30 includes a first chip resistor Ru, a chip resistor M2, a third input terminal 13, and a third output terminal. 3, a; = terminal 14, a fourth output terminal 〇 4 a first electric ... a coil group L and a second resistor R2. The coil group [includes a first coil loop L2, a first connecting end 31 and a second connecting end %. The fourth input terminal 4 is connected to the first capacitor C1 and the second capacitor c2, respectively. The first resistor R1 is connected between the first connection terminal 31 and the third input terminal i3. The second resistor R2 is connected between the second connection terminal % and the third output terminal (1). The first chip resistor R11 is connected to the first capacitor. Between the end 32 and the end 32. The second chip resistor (4) is connected between the first resistor and the fourth output terminal 〇4. The resistance of the first chip resistor Rn is much smaller than the resistance of the first resistor Ri, and the resistance of the second chip resistor R12 is much smaller than the resistance of the second resistor R2. In this embodiment, the first coil u and the second coil L2 are wound in the same direction and are arranged in parallel. The first coil_ is connected between the first resistor R1 and the first resistor R2. The second coil L2 is connected to First, between the resistor R1 and the second chip resistor R12. In the present embodiment, the audio playback circuit 40 includes a first divided piezoelectric resistor R3, a first voltage dividing resistor R4, and an audio player 41. The audio player 41 includes a first signal terminal 42 and a second signal terminal 43. The second input terminal 13 of the magnetic field generating circuit 30 is coupled to the first signal terminal 42 via the first voltage dividing resistor R3. The third output terminal 〇3 is connected to the second signal terminal 43 via the second voltage dividing resistor R4. ❹ When the first chip resistor RU and the second chip resistor R12 are both disconnected, the first input terminal u of the filter 10 receives an audio signal S1, and the filter ίο filters the 'waves' from the first The output terminal 01 outputs to the first capacitor ci for south frequency chopping, filters and removes the high frequency interference signal, and then shunts at the third input terminal 13, and the first signal input to the audio player 41 after passing through the first voltage dividing resistor R3. The end 42 drives the audio player 41 to emit sound; the other is input to the first connection end 31 of the coil group L via the first resistor R1, and the signal passes through the first coil, the first resistor R2, and the second output terminal. 〇3, the fourth output terminal and the second capacitor C2 input to the second output terminal i2 of the filter 1G form a signal back/re-transmission to the other circuit or the second mountain terminal Q2 to the other circuit or the Wangshan wafer ( The figure is not shown) for further processing. At this time, the signal is output from the third input via the first resistor R1 through the first coil L1 and through the third output terminal 〇3, and the first coil LU of the coil group L generates a magnetic field in one direction. When the first chip resistor R11 and the second chip resistor group are both turned on, the second frequency signal S1 is waved through the ferropole 10, and then passed through the first output terminal 〇1 ^ to m C1 for high_wave signal From the magnetic field generating circuit 32;! four input terminals: input to the second connecting end 32 and at the second connecting end knife ~, one way through the second resistor R2 to the third output end 03 and then through the second 11 201015951, after blocking R4 The second signal terminal 43 input to the audio player 41 emits a sound by the drive frequency converter 41, and the other circuit is input to the coil group L. The second coil: _ a coil U is input to the second coil L2 via the first connection terminal 31. , the second chip resistor R12, the fourth output terminal 及4, and the second capacitor c2 are input to the first output terminal 12 of the 1G to form a signal loop or a chopper-output terminal 02 to the other circuit or the processing chip. (not shown) TM T1 _ this f, since the signal passes from the fourth input terminal I4 through the first line
G H—線圈L2後流至第二貼片電阻經 輸出端04輸出。壯拄堆 奋太1 匕夺’第一線圈L1與第二線圈L2分別 會產；一相反方向之磁場。因此會有-合磁場。 笛二手機出產前，需先進行測試。首先將第三輸入端13、 接躺：毺端14、第二輪出端〇3及第四輸出端04均斷開， 〜，測试手機於接聽狀態下之磁場強度並將其記 錄。假設此時，記錄之磁場強度為1〇〇高斯。 接聽Ϊ:種情況’將第三輸入端13與第三輸入端03接通， 、，訊號從第三輸入端13經第一線圈L1再經第-經第三輸出端〇3輸出，第一線圈二=: 時St:二：設此時記錄之磁場強度為120高斯，則此 本身產决、’圈Ll產生之磁場強度為20高斯且與手機 時第磁場方向相同，這樣手機本身產生之磁場與此 磁場強之合磁場為120高斯’相對先前記錄之 +駐要又曰〇。饭设磁場強度為90高斯就會幹擾其他之電 擾：纟此^加強對一些電子裝I，如助聽器之蜂音幹 12 201015951 ♦ <· 一第二種情況，再將第四輸入端14與第四輸出端〇4、第 一貼片電阻R11與第二貼片電阻R12均接通，訊號從第四 輸入端14經第一貼片電阻R11、第一線圈L1再經第一連接 私31至第—線圈L2，再經第二貼片電阻R12至第四輸出 端0二輸出。由於經過第一線圈L1之電流方向與第一種情 況測試時之電流方向相反，因此第-線圈L1產生之磁場強 度一樣為20高斯，方向與第一種情況測試之磁場方向相 ❹反此時，手機接聽時本身產生之磁場與第一線圈u之產 ^之合磁場為80高斯。因為此時，第二線圈L2產生之磁 場與手機接聽時本身產生之磁場方向相同，會加強幹擾。 由公式：H=NI/L(其中，η為磁場強度，N為線圈匝數，j 為線圈上之電/;IL，L為線圈繞線長度），可得出可通過改變 第二線圈L2線圈匝數或繞線長度來控制第二線圈l2產生 之磁場強度。此時，應將第二線圈L2產生之磁場強度控制 於10高斯以下。 ❹ 第三種情況，先將第三輸入端13與第三輸入端〇3接 通，接聽手機，訊號從第三輸入端13經第一線圈u再經 第二電阻R2經第三輸出端〇3輸出，第一線圈組u產生 一方向之磁場且磁場強度為20高斯，假設此時記錄之磁場 強度為80高斯，則測試之合磁場相對第一種情況所記錄之 磁場強度減弱。此後，再將第四輸入端14與第四輸出端 04、第一貼片電阻R11與第二貼片電阻R12均接通，訊號 從第四輸入端14經第一貼片電阻Ru、第一線圈m再經第 一連接端31至第二線圈L2,再經第二貼片電阻Ru至第 13 201015951 四輪出端04輸出。由於經過第一線圈L1之電流方向與第 一種情況測試時之電流方向相同，因此第一線圈L1產生與 - 第一種情況之磁場方向相同且磁場強度同樣為2〇高斯。此G H—coil L2 flows to the second chip resistor and is output through output terminal 04. The sturdy pile of enthusiasm 1 plunders the first coil L1 and the second coil L2 respectively; a magnetic field in the opposite direction. Therefore there will be a combined magnetic field. Before the production of the flute two mobile phones, it is necessary to test first. First, the third input terminal 13, the lie, the second end, the second end, and the fourth output 04 are disconnected, and the magnetic field strength of the mobile phone in the listening state is tested and recorded. Assume that at this time, the recorded magnetic field strength is 1 〇〇 Gauss. Answering: In the case of 'the third input terminal 13 and the third input terminal 03, the signal is output from the third input terminal 13 through the first coil L1 and then through the third output terminal 〇3, first Coil two =: When St: two: set the magnetic field strength recorded at this time is 120 Gauss, then the production itself, the magnetic field strength generated by the circle Ll is 20 Gauss and the same direction as the magnetic field of the mobile phone, so that the mobile phone itself generates The combined magnetic field of the magnetic field and the magnetic field is 120 Gauss' relative to the previously recorded + station. If the magnetic field strength of the rice is 90 Gauss, it will interfere with other electrical disturbances: ^This strengthens the electronic sound I, such as the hearing aid of the buzzer. 12 201015951 ♦ <· A second case, then the fourth input 14 And the fourth output terminal 〇4, the first chip resistor R11 and the second chip resistor R12 are both turned on, and the signal is sent from the fourth input terminal 14 through the first chip resistor R11, the first coil L1, and the first connection. 31 to the first coil L2, and then output through the second chip resistor R12 to the fourth output terminal 0. Since the current direction through the first coil L1 is opposite to the current direction in the first case test, the magnetic field strength generated by the first coil L1 is 20 Gauss, and the direction is opposite to the direction of the magnetic field tested in the first case. The magnetic field generated by the mobile phone itself and the magnetic field generated by the first coil u are 80 Gauss. Because at this time, the magnetic field generated by the second coil L2 is the same as the direction of the magnetic field generated by the mobile phone itself, which will enhance the interference. By the formula: H = NI / L (where η is the strength of the magnetic field, N is the number of turns of the coil, j is the electricity on the coil /; IL, L is the length of the coil winding), it can be concluded that the second coil L2 can be changed The number of turns of the coil or the length of the winding is used to control the strength of the magnetic field generated by the second coil 12. At this time, the magnetic field intensity generated by the second coil L2 should be controlled to be 10 gauss or less. ❹ In the third case, the third input terminal 13 is first connected to the third input terminal 〇3, and the mobile phone is received, and the signal is transmitted from the third input terminal 13 through the first coil u through the second resistor R2 through the third output terminal. 3 output, the first coil group u generates a magnetic field of one direction and the magnetic field strength is 20 Gauss. Assuming that the magnetic field strength recorded at this time is 80 Gauss, the combined magnetic field of the test is weakened relative to the magnetic field intensity recorded in the first case. Thereafter, the fourth input terminal 14 and the fourth output terminal 04, the first chip resistor R11 and the second chip resistor R12 are both turned on, and the signal is passed from the fourth input terminal 14 through the first chip resistor Ru, first. The coil m is further outputted through the first connection end 31 to the second coil L2, and then through the second chip resistor Ru to the 13th 201015951 four-wheel output 04. Since the current direction through the first coil L1 is the same as the current direction in the first case test, the first coil L1 produces the same magnetic field direction as in the first case and the magnetic field strength is also 2 〇 Gauss. this
時’手機接聽時本身產生之磁場與第一線圈L1之產生之合 磁場為120高斯。因為此時，第二線圈[2產後之磁場與手 機接聽時本身產生之磁場方向相反，會減弱幹擾。由公式： H=NI/L (其中’H為磁場強度，N為線圈匝數，〗為線圈上 Q之電流’[為線圈繞線長度），可得出可通過改變第二線圈 L2線圈匝數或繞線長度來控制第二線圈丄2產生之磁場強 度。此時’應將第二線圈L2產生之磁場強度控制於30-120 尚斯之間，以使手機接聽電話本身產生之磁場與線圈組L 之間產生之合磁場強度控制於9〇高斯以下。從而可避免幹 擾其他之電子裝置。 該電子裝置之消磁電路利用磁場發生電路之通電線圈 組產生之磁場與電子裝置本身產生之磁場方向相反之磁 ©場，該兩個相反方向之磁場相互抵消，以達到消磁之目之。 综上所述，本發明確已符合發明專利之要件，遂依法 提出專利申請。惟，以上所述者僅為本發明之較佳實施方 式，自不能以此限制本案之申請專利範圍。舉凡熟悉本案 技藝之人士援依本發明之精神所作之等效修飾或變化，皆 應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 電子裝置之消磁 圖1係本發明之較佳實施方式提供之 電路之電路圖。 201015951 【主要元件符號說明】When the mobile phone picks up, the magnetic field generated by itself and the first coil L1 generate a combined magnetic field of 120 Gauss. Because at this time, the second coil [2 post-production magnetic field and the direction of the magnetic field generated by the handset itself will be opposite, which will reduce the interference. By the formula: H=NI/L (where 'H is the magnetic field strength, N is the number of turns of the coil, 〗 is the current of Q on the coil' [for the coil winding length), it can be concluded that the coil of the second coil L2 can be changed by The number or winding length is used to control the strength of the magnetic field generated by the second coil 丄2. At this time, the magnetic field intensity generated by the second coil L2 should be controlled between 30-120 尚s, so that the magnetic field strength generated between the magnetic field generated by the mobile phone answering the telephone itself and the coil group L is controlled below 9 〇 Gauss. This avoids interference with other electronic devices. The degaussing circuit of the electronic device uses the magnetic field generated by the energized coil group of the magnetic field generating circuit and the magnetic field generated by the electronic device itself to cancel the magnetic field, and the two opposing magnetic fields cancel each other to achieve the purpose of degaussing. In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the present invention are intended to be included within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Degaussing of an electronic device Fig. 1 is a circuit diagram of a circuit provided by a preferred embodiment of the present invention. 201015951 [Main component symbol description]
消磁電路 100 遽波器 10 高頻濾波電路 20 磁場發生電路 30 音頻播放電路 40 線圈組 L 第一線圈 L1 第二線圈 L2 第一貼片電阻 R11 第二貼片電阻 R12 第三输出端 03 第四輸出端 04 第一連接端 31 第二連接端 32 音頻播放器 41 第一訊號端 42 第二訊號端 43 第一電阻 R1 第二電阻 R2 第一分压电阻 R3 第二分压电阻 R4 15Degaussing circuit 100 Chopper 10 High frequency filter circuit 20 Magnetic field generating circuit 30 Audio playback circuit 40 Coil group L First coil L1 Second coil L2 First chip resistor R11 Second chip resistor R12 Third output terminal 03 Fourth Output 04 First connection end 31 Second connection end 32 Audio player 41 First signal terminal 42 Second signal terminal 43 First resistor R1 Second resistor R2 First voltage dividing resistor R3 Second voltage dividing resistor R4 15