070485.TW 25457twf.doc/p 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種信號傳輸技術，且特別是有關於 一種用於降低電磁干擾的傳輸數位信號的技術。 【先前技術】 近年來’由於印刷電路板不斷進步，使得電子產品的 應用日益廣泛’需求日益增加，各種電子產品的電路設計 越來越複雜。印刷電路板（Printed circuit board，PCB)幾 乎會出現在每一種電子設備當中。設備中幾乎所有的電子 元件都是鑲在大小各異的PCB上。除了固定各種小元件 外’ PCB的主要功能是提供其上各項元件的相互電氣連 接。如果標準的PCB上沒有元件，也常被稱為“印刷線路 板 Printed Wiring Board ( PWB ) ” 〇 PCB可分為單面板、雙面板、四層板以上多層板及軟 板。PCB板本身的基板是由絕緣隔熱、並不易彎曲的材質 所製作成。在表面可以看到的細小線路材料是銅箔，原本 銅箔是覆蓋在整個板子上的’而在製造過程中部份被蝕刻 處理掉，留下來的部份就變成網狀的細小線路了。這些線 路被稱作導線（conductor pattern)或稱佈線，並用來提供 PCB上元件的電路連接。070485.TW 25457twf.doc/p IX. Description of the Invention: [Technical Field] The present invention relates to a signal transmission technique, and more particularly to a technique for transmitting a digital signal for reducing electromagnetic interference. [Prior Art] In recent years, the demand for electronic products has become increasingly widespread due to the continuous advancement of printed circuit boards, and the circuit design of various electronic products has become more and more complicated. Printed circuit boards (PCBs) appear in almost every electronic device. Almost all of the electronic components in the device are mounted on PCBs of various sizes. In addition to fixing various small components, the main function of the PCB is to provide mutual electrical connection between the components. If there are no components on a standard PCB, it is often referred to as a "printed Wiring Board (PWB)". 〇 PCBs can be divided into single-panel, double-panel, multi-layer and multi-layer boards and soft boards. The substrate of the PCB itself is made of a material that is insulated and hard to bend. The thin circuit material that can be seen on the surface is copper foil. The original copper foil is covered on the entire board, and part of the manufacturing process is etched away, and the remaining part becomes a mesh-like small line. These lines are referred to as conductor patterns or wires and are used to provide electrical connections to components on the PCB.
為了將元件固定在PCB上面，通常是將元件的接腳直 接焊在佈線上。一般而言，焊接在PCB上的元件為電阻、 電容、電感和積體電路（1C)塊等。但是，在PCB上的各 元件工作時會產生電磁波，而產生電磁干擾現象，稱為EMI 070485.TW 25457twf.doc/p 反轉信號產生電路1()5為第—及第二週 值產生m資料反轉 ^枓位讀 號係依據判斷信號及第-資料反轉信號肯= 電路浙依據第二資料反轉信號選擇性地輪轉 元在第二週期中之數值或補數之一。 聲一貝料位 採用上述技術，通過低雜訊資料輸出驅 歷，採用了多種電路，並不翻於日 且’知用多種電路必然增加了原材料的消乾^ 成本。 日加了生產 【發明内容】 本發明提供-種傳輸低電磁干擾信號 置’以解決現有技術巾帶來的較高的電磁 ’ ^、 成本高的問題。 私波’生產 本發明提出一種傳輸低電磁干擾信號的 數位信號傳輸，此裝置包括：編碼信號產生器'第—於-以及^二元件。編碼信號產生器是狀產生編竭信號兀: 編碼信號的週期是變動的。第一元件包括第一互斥戋 路，前述第一互斥或電路具有第一輸入端、第二輸入 及輸出端，第一輸入端耦接至編碼信號產生器，第二輪入 端耦接至源信號，用於將源信號與編碼信號執行互斥^運 算，以產生低電磁干擾輸出信號。第二元件包括第二互斥 或電路，前述第二互斥或電路具有第一輸入端、第二輸入 端以及輪出端，第一輸入端耦接至編碼信號產生器，^二 輸入端耦捿至第一互斥或電路的輸出端，用於將低電磁干 070485.TW 25457twf.doc/p 擾輸出信號與編碼錄執行互 的實施例所述的傳輸低電=號 的裝置’其中編碼信號為白雜訊。 月的另—實施例所述的傳輸低電磁干擾信 號的裝置’上权傳輸低電軒擾 路徑，設置於第-元件枯得翰 干擾輸出信號的傳輸介f 70件之間，用以做為低電磁 ，，土發明的實施例所述傳輸低電磁干擾信號的裝 置’其中弟-元件與第二S件為積體電路塊。 月另提出種傳輸低電磁干擾信號的方法，用於 现弟、兀件與-第二元件間執行一數位信號傳輸，其步 吝供—編碼信號產生器。其另—步驟為編碼信號 益^編碼信f虎’此編石馬信號的週期是變動的。還包 ^步驟：第—元件將m她編碼錢執行互斥或運 异’以產生-低電針擾輸出信號後輸出；以及第二元件 5低電斜擾輸出信號，且將其與編碼信號執行互斥或 運昇，以在第二元件處重新獲得源信號。 、丄f發明的一種傳輸低電磁干擾信號裝置和方法，將一 源和一編碼信號執行互斥或運算來產生低電磁干擾輸 ，互斥或運算所產生的低電磁干擾輸出信號，其頻 譜展f，形成低電磁干擾信號，並且通過將該低電磁干擾 〕出彳。说再_人與編碼仏號執行互斥或運算來恢復源信號。 其過私簡單’只需採用編碼信號產生器和互斥或電路，減 少了原材料的消耗，降低生產成本。 1338450 070485.TW 25457twfdoc/p 為讓本發明之上述和其他目的、特徵和優點能更明顯 易懂，下文特舉較佳實施例，並配合所附圖式，作詳細說 明如下。In order to mount the component on the PCB, the pins of the component are usually soldered directly to the wiring. In general, the components soldered on the PCB are resistors, capacitors, inductors, and integrated circuit (1C) blocks. However, when various components on the PCB work, electromagnetic waves are generated, and electromagnetic interference occurs, which is called EMI 070485.TW 25457twf.doc/p. The inversion signal generation circuit 1()5 generates the first and second weeks. The data inversion ^枓 reading number is based on the judgment signal and the first-data inversion signal. The circuit is based on the second data inversion signal to selectively rotate one of the values or the complement in the second period. Sound one shell material level Using the above technology, through the low noise data output drive, a variety of circuits are used, which does not turn over the day and the use of multiple circuits inevitably increases the cost of raw materials. BACKGROUND OF THE INVENTION The present invention provides a method of transmitting a low electromagnetic interference signal to solve the problem of high electromagnetic cost and high cost brought by prior art tissues. Private Wave 'Production The present invention proposes a digital signal transmission for transmitting a low electromagnetic interference signal, the apparatus comprising: an encoded signal generator '--- and two elements. The coded signal generator produces a compiled signal: The period of the encoded signal is variable. The first component includes a first mutual exclusion circuit, and the first mutual exclusion circuit has a first input end, a second input end and an output end, the first input end is coupled to the coded signal generator, and the second wheel end is coupled The source signal is used to perform a mutually exclusive operation on the source signal and the encoded signal to generate a low electromagnetic interference output signal. The second component includes a second mutual exclusion circuit having a first input terminal, a second input terminal, and a wheel output terminal, the first input terminal being coupled to the coded signal generator, and the second input terminal coupled捿to the output of the first mutex or circuit, for transmitting the low electromagnetic dry 070485.TW 25457 twf.doc/p scrambled output signal and the code recording The signal is white noise. In another embodiment of the present invention, the device for transmitting a low electromagnetic interference signal has a low-power transmission path, and is disposed between the transmission device of the first component, the interference signal of the output signal, and is used as Low electromagnetic, the apparatus for transmitting a low electromagnetic interference signal as described in the embodiment of the invention, wherein the second component and the second S component are integrated circuit blocks. Another method for transmitting low electromagnetic interference signals is proposed in the month for performing a digital signal transmission between the younger brother, the latter and the second component, and the step is to provide a coded signal generator. The other step is to encode the signal, and the period of the coded horse signal is varied. The method further includes the steps of: the first component will m-encode the money to perform mutual exclusion or differentiating 'to generate a low-powered pinch-out output signal, and the second component 5 low-voltage-slanting output signal, and the encoded signal Perform a mutual exclusion or an upgrade to regain the source signal at the second component. A device and method for transmitting low electromagnetic interference signals invented by 丄f, which performs a mutual exclusion or operation on a source and a coded signal to generate a low electromagnetic interference output signal generated by low electromagnetic interference, mutual exclusion or operation, and a spectrum thereof f, forming a low electromagnetic interference signal and passing the low electromagnetic interference. Say _ people and the code nickname perform a mutual exclusion or operation to recover the source signal. It's too simple to use 'only need to use coded signal generators and mutual exclusion or circuit, reducing the consumption of raw materials and reducing production costs. The above and other objects, features, and advantages of the present invention will become more fully understood from
【實施方式】 本發明的特徵之一在於將一源信號和一編碼信號執 行互斥或運算來產生一低電磁干擾輸出信號，並且通過將 此低電磁干擾輸出信號再次與編碼信號執行互斥或運算來 恢復源信號’解決了 PCB設計中高電磁干擾信號的問題。 參照圖2 ’其為本發明實施例的傳輸低電磁干擾信號 的裝置的結構示意圖。本發明的傳輸低電磁干擾信號的裝 置用於一數位k號傳輸，可設置於任何PCB電路上。如圖 所示，傳輸低電磁干擾信號傳輸的裝置2〇〇包括：編碼信 號產生器201、第一元件203、第二元件2〇5和傳輸路徑 211。其中，編碼信號產生器2〇1用於產生一編碼信號，該 編碼信號為一數位信號，主要表現形式為“〇1，，信號。或 者’該編碼信號可為-噪音源信號，㈣音源信號為一白 雜訊（white noise)。第一元件2〇3包括第一互斥或電路 207，所述第-互斥或電路2〇7具有第一輸入端、第二輸入 端以及輸^端，第—互斥或電路2G7的第-輸入端減至 ’為碼產生201產生的編碼信號，第二輸入端耗接至源信 號，前述源信號例如為週期— 電路207的輸出端輪屮U 心m 出斥或運算後產生的低電磁干擾 第、二、雷=7°件2°5包括第二互斥或電路2。9 ’所述 第二互斥或電路2〇9具有第—輪人端、第二輸入端以及輸 070485.TW 25457twf.doc/p A B P 0 0 1 _ 0 0 1 1 1 0 1 1 1 0 表1 採用互斥或運算“相同取0，不同取1”的演算法， 將源信號與編碼信號互斥或後產生低電磁干擾信號。所述 低電磁干擾信號在時域中週期大小不―，其能量一定。可 採用傅立葉等頻域-時域變換，根據頻域和時域的轉換規 律，轉換成頻域後，其頻率點增多，頻譜展寬後其原來集 中於一頻率點的能量分散到各頻率點上，該信號的能量不 變，但在個頻率點上的能量降低。 _同^樣方式，前述第二互斥或電路209根據互斥或公式 p = ，其中，P為互斥或後的信號，A、B在本申請中 為低電磁干擾信號和編碼信號。由公式可得：上述低電磁 干擾彳5號/編碼彳§號首先通過反閘後與編碼信號/低電磁干 擾信號輸入至及閘，產生一第一輸出信號，同樣，上述編 碼仏唬/低電磁干擾信號通過反閘後與低電磁干擾信號/編 碼信號輸入至及閘，產生一第二輸出信號，該第一輸出信 號和第二輸出信號通過或閘輸出互斥或後的信號，即源信 號。 具體為：通過將低電磁干擾輸出信號與該編碼信號互 斥或，產生該源信號。該互斥或演算法和第一互斥或電路 1338450 070485.TW 25457twf.doc/p 振信號 301 為：OlOlOloioioioioi， 同理可得編碼信號302為：ooiiiiiooioooiio， 將兩個信號執行互斥或運算後得到低EMI信號303 為0110101100010011。或者，可直接根據“高電平和低電 平產生一尚電平，高電平和高電平產生一低電平，低電平 和低電平產生一低電平”的原則，直接得出低EMI信號 303的波形，其結果和上述演算法得出的結果相同。隨後， 將^到的低EMI信號303與上述編碼信號302執行互斥或 運异，該過程與上述互斥或過程相同，此處不再贅述，得 到一恢復信號305為〇1〇1〇ι〇ι〇1〇1〇1〇1，其即為源信號。 、综上所述，在本發明之低電磁干擾信號傳輸裝置和方 法，通過將一源信號和一編碼信號互斥或來產生一低電磁 干擾輸出錢’互斥或產生低電磁干擾輸―號，其頻譜 ^ ’形絲EMI，並且通過將該低電磁預輸出信號再 -人與編碼信號互斥或來恢復源信號，其過程簡單。並且口 =3斥1 電路即可完成信號的轉換過程，減少了職 可、甬M 生產成本。並且’低電磁干擾輸出信號仍 I通=核電路恢復成錢錄—樣，增加了 pcB的性 月匕’同犄也增加了 PCB的實用性。 雖然本發明已以較佳實施例揭露如上，然 限定本發明，任何熟習此技藝者， 2^日 和範圍内，當可作些許之更動與潤之精1 範圍當視後附之申請專利範圍所界定者^私明之保護 【圖式簡單說明】 … 13 1338450 070485.TW 25457twf.doc/p 圖1繪示為公知的一種低雜訊資料輸出驅動電路。 圖2繪示為本發明實施例的一種低電磁干擾信號傳輸 裝置的結構示意圖。 圖3繪示為採用本發明低電磁干擾信號傳輸方法進行 轉換、還原信號的波形圖。 【主要元件符號說明】[Embodiment] One of the features of the present invention is that a source signal and an encoded signal are mutually exclusive ORed to generate a low electromagnetic interference output signal, and by performing the mutual exclusion of the low electromagnetic interference output signal with the encoded signal again or The operation to recover the source signal 'solves the problem of high electromagnetic interference signals in the PCB design. 2 is a schematic structural view of an apparatus for transmitting a low electromagnetic interference signal according to an embodiment of the present invention. The apparatus for transmitting low electromagnetic interference signals of the present invention is used for a digital k-number transmission and can be placed on any PCB circuit. As shown, the apparatus 2 for transmitting low electromagnetic interference signal transmission includes an encoded signal generator 201, a first element 203, a second element 2〇5, and a transmission path 211. The coded signal generator 2〇1 is used to generate an encoded signal, which is a digital signal, and the main expression is “〇1,, signal. Or 'the encoded signal can be a noise source signal, and (4) the sound source signal. Is a white noise. The first component 2〇3 includes a first mutually exclusive OR circuit 207 having a first input terminal, a second input terminal, and a power input terminal The first input of the first-mutual exclusive circuit 2G7 is reduced to 'the encoded signal generated by the code generation 201, and the second input is consumed to the source signal, for example, the output of the period-circuit 207 is rim U The low electromagnetic interference generated by the heart m repulsion or operation, the second, the thunder = 7 ° piece 2 ° 5 includes the second mutual exclusion or circuit 2. 9 'the second mutual exclusion circuit 2 〇 9 has the first wheel Human terminal, second input terminal and input 070485.TW 25457twf.doc/p ABP 0 0 1 _ 0 0 1 1 1 0 1 1 1 0 Table 1 uses the mutual exclusion or operation "the same takes 0, the difference is 1" The method, the source signal and the coded signal are mutually exclusive or generate a low electromagnetic interference signal. The low electromagnetic interference signal is in time The medium period is not sized, and its energy is constant. Fourier frequency domain-time domain transform can be used. According to the frequency domain and time domain conversion law, after frequency domain is converted, its frequency point increases, and the spectrum is broadened and then concentrated on one. The energy of the frequency point is dispersed to each frequency point, the energy of the signal is constant, but the energy at the frequency point is decreased. In the same manner, the second mutex OR circuit 209 is based on the mutual exclusion or the formula p = , Where P is a mutually exclusive or post-signal, A and B are low electromagnetic interference signals and coded signals in the present application. It can be obtained from the formula: the above-mentioned low electromagnetic interference 彳5/code 彳§ number first passes through the reverse gate and The coded signal/low electromagnetic interference signal is input to the gate and generates a first output signal. Similarly, the coded 仏唬/low electromagnetic interference signal is input to the gate after the reverse gate and the low electromagnetic interference signal/coded signal, generating a first a second output signal, the first output signal and the second output signal output a mutually exclusive or subsequent signal through the OR gate, that is, the source signal. Specifically: by mutually exchanging the low electromagnetic interference output signal and the encoded signal The source signal is generated. The mutex or algorithm and the first mutex or circuit 1338450 070485.TW 25457twf.doc/p oscillator signal 301 is: OlOlOloioioioioi, and the same encoded signal 302 is: ooiiiiiooioooiio, the two signals are executed Mutual exclusion or operation results in a low EMI signal 303 of 0110101100010011. Alternatively, it can directly generate a low level according to "high level and low level, high level and high level generate a low level, low level and low level. The principle of a low level directly leads to the waveform of the low EMI signal 303, and the result is the same as that obtained by the above algorithm. Then, the low EMI signal 303 and the encoded signal 302 are mutually exclusive or different. The process is the same as the above-mentioned mutual exclusion or process, and is not described here again, and a recovery signal 305 is obtained as 〇1〇1〇ι. 〇ι〇1〇1〇1〇1, which is the source signal. In summary, the low electromagnetic interference signal transmission apparatus and method of the present invention generates a low electromagnetic interference output by mutual exclusion of a source signal and a coded signal, or generates a low electromagnetic interference transmission. The spectrum ^ 'shaped wire EMI, and the source signal is restored by re-exerating the low electromagnetic pre-output signal and the coded signal, the process is simple. And the port = 3 replies 1 circuit can complete the signal conversion process, reducing the production cost of 职M. And the 'low electromagnetic interference output signal is still I pass = the nuclear circuit is restored to the money record, which increases the sex of the pcB', and also increases the practicality of the PCB. Although the present invention has been disclosed in the above preferred embodiments, the invention is intended to be limited to the scope of the invention. The defined person ^ private protection [schematic description] ... 13 1338450 070485.TW 25457twf.doc / p Figure 1 shows a known low noise data output drive circuit. 2 is a schematic structural diagram of a low electromagnetic interference signal transmission apparatus according to an embodiment of the present invention. 3 is a waveform diagram of a conversion and reduction signal using the low electromagnetic interference signal transmission method of the present invention. [Main component symbol description]
101 ··資料比較電路 103 :資料反轉判斷電路 105 :資料反轉信號產生電路 107 :資料反轉電路 200 :傳輸低電磁干擾信號的裝置 201 :編碼信號產生器 203 :第一元件101··data comparison circuit 103: data inversion determination circuit 105: data inversion signal generation circuit 107: data inversion circuit 200: means for transmitting low electromagnetic interference signal 201: coded signal generator 203: first element
205 :第一互斥或電路 207 :第二元件 209 :第二互斥或電路 211 :傳輸路徑 301 :源信號 302 :編碼信號 303 :低EMI信號 305 :恢復信號205: first mutex or circuit 207: second element 209: second mutex or circuit 211: transmission path 301: source signal 302: coded signal 303: low EMI signal 305: resume signal
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