1269219 15368twf.doc/g 九、發明說明： 【發明所屬之技術領域】 本發明是有關於—種音頻電路 抑制雜訊干擾的音頻電路。 特別疋有關於一種 【先前技術】 早期的ISA音效卡由於集成度不高， =件’後來隨著技術和工藝水準的發展； 效卡，只用—塊晶片就可以完成音效卡所有^L早Γ 音效卡的數位部分和類比部分集成在 ^於 =顧）對類比部分的影響，使得w音效 計tc"97標準則提出“雙晶片，，結構，即將音頻處理的數 私路與類比電路兩部分分開，每個部分單獨使用 =部分的是由“场⑽e”（音·號編碼/曰解片碼 為）的小型晶片來處理，而數位部分的電路則由“以獅 Control (數位控制器）的晶片來處理。ac，標準社人了 數位處理和類比處理兩方面的優，點，—方面減少了由類^路 轉換至數位線路時可能會出現的雜訊（n〇ise)，營造出了更加 純淨的音質；另-方面，將音效處理錢到¥組後，可以進 一步降低成本。 然而，在音頻電路的佈線上，為了避免類比訊號與數位訊 唬相互干擾’基板上會獨立切出一塊類比接地區（AGND)讓 音頻訊號走線用，並與數位接地區（DGND)做區隔。但是， 由於類比接地區（AGND)通常小於數位接地區（DGND)， 1269219 15368twf.doc/g 且雜訊較乡，所以當音頻訊號在類比接祕（AGND)上傳遞 時容易將雜訊帶出來，而無法有效抑制電磁 【發明内容】 本毛明的目的就是在提供一種抑制雜訊干擾之音頻電 路，能避A音頻訊號在類比接地區上傳遞時將雜訊帶出來， 以達到抑制雜訊的效果。 本發明提出一種抑制雜訊干擾之音頻電路，包括一基 籲板、-訊號處理器、至少一音頻插座、至少一濾波元件以 及至少一電感元件。其中，基板具有一數位接地區、一類 比，地區以及一機殼接地區，而訊號處理器配置於該基板 之類比接地區上，且音頻插座配置於該基板之機殼接地區 上，並透過基板之一訊號層連接至訊號處理器。此外，濾 波元件之一端連接於基板之類比接地區與機殼接地區之 間，且濾波元件之另一端連接於基板之訊號層。另外，電 感元件連接於基板之類比接地區與機殼接地區之間。 依照本發明的較佳實施例所述，上述之訊號處理器例 • 如是音頻訊號編碼/解碼器（Audio Codec)。此外，音頻 插座例如包括麥克風插座、喇σ八插座、耳機插座以及錄音 插座。 依照本發明的較佳實施例所述，上述之機殼接地區的 面積例如小於等於類比接地區。 依照本發明的較佳實施例所述，上述之濾波元件例如 疋電感電容濾波器（Lc filter)。 本發明因切割原先類比接地區在音頻插座上的部分面 1269219 15368twf.doc/g 以及至少一帝，彳蜀立的機殼接地區，並配置多個濾波元件 if，π槪& =感凡件於類比接地區與機殼接地區之間。因 將音頻訊號IS賴上麟賴帶到音雜座上，且可 為讓本發^訊渡掉，以達到膽抑制的效果。 易懂，下文特汽之上述和其他目的、特徵和優點能更明顯 明如下。 *較佳實施例，並配合所附圖式，作詳細說1269219 15368twf.doc/g IX. Description of the Invention: [Technical Field] The present invention relates to an audio circuit for suppressing noise interference by an audio circuit. In particular, there is a kind of [previous technology]. The early ISA sound card was not integrated because of the low level of integration, and then the development of the technology and the process level; the effect card, only the block chip can complete the sound card all ^L early数 The digital and analog parts of the sound card are integrated in the analogy of the analog part, so that the w sound system tc"97 standard proposes "dual-chip, structure, the number of private circuits and analog circuits of audio processing" Partially separated, each part is used separately = part is processed by a small wafer of "field (10)e" (sound code encoding/decoding chip), while the digital part of the circuit is controlled by "Lion Control" The wafer is processed. Ac, Standard Society has excellent advantages in both digital processing and analog processing. In terms of aspects, it reduces the noise (n〇ise) that may occur when converting from analog to digital lines, creating a purer sound quality. On the other hand, after the sound effect is processed to the ¥ group, the cost can be further reduced. However, in the wiring of the audio circuit, in order to avoid interference between the analog signal and the digital signal, an analog analog area (AGND) is cut out on the substrate to allow the audio signal to be routed, and the digital area is DGND. Separate. However, since the analog area (AGND) is usually smaller than the digital area (DGND), 1269219 15368twf.doc/g and the noise is relatively good, it is easy to bring out the noise when the audio signal is transmitted on the analog interface (AGND). The invention cannot provide effective suppression of electromagnetics. [Inventive content] The purpose of the present invention is to provide an audio circuit for suppressing noise interference, which can prevent noise from being transmitted when the A-audio signal is transmitted in the analog-like area to suppress noise. Effect. The present invention provides an audio circuit for suppressing noise interference, comprising a substrate, a signal processor, at least one audio jack, at least one filter element, and at least one inductive element. The substrate has a digital connection area, an analogy, an area, and a chassis connection area, and the signal processor is disposed on the analog area of the substrate, and the audio socket is disposed on the chassis connection area of the substrate, and One of the signal layers of the substrate is connected to the signal processor. In addition, one end of the filter element is connected between the analog region of the substrate and the region where the chassis is connected, and the other end of the filter component is connected to the signal layer of the substrate. In addition, the inductive component is connected between the analog area of the substrate and the area where the chassis is connected. According to a preferred embodiment of the present invention, the above signal processor is, for example, an audio codec/Audio Codec. Further, the audio jack includes, for example, a microphone jack, a sigma socket, a headphone jack, and a recording jack. According to a preferred embodiment of the present invention, the area of the casing area is, for example, less than or equal to the analog area. According to a preferred embodiment of the invention, the filter element is, for example, a tantalum inductor filter (Lc filter). The invention is configured to cut a part of the original analogy area on the audio socket 1269219 15368twf.doc/g and at least one emperor, stand in the chassis area, and configure a plurality of filter elements if, π槪 & The parts are between the analog area and the chassis area. Because the audio signal IS is brought to the sound seat, and the hair can be used to achieve the effect of bile suppression. It is easy to understand that the above and other objects, features and advantages of the special steam below can be more clearly as follows. *The preferred embodiment, in conjunction with the drawings, is described in detail
【實施方式】 請參考圖丨，^ 雜訊干擾之音,♦其繪示本發明一較佳實施例之一種抑制 主機板上。的示意圖’_於内建有控制晶片之 11A 制減汛干擾之音頻電路100主要包括一基 板10、一訊號處理器12〇、一音頻插座13〇、多數個濾波 =140 142以及至少一電感元件150。在本實施例中， ς使基板110上的數位訊號與類比訊號不共用同一個 |也平面，基板11〇將其接地區域分割為三個區域， =數位接地區112、-類比接地區114以及-機 # 區Π6因此，基板110上之數位訊號可在數 妾i區/12所在的的訊號層上傳輸，且基板11()上 =比訊號可在類比接地區114以及機殼接地區ιι6 的.fU虎層上傳輪，兩者之間可避免訊號間的干擾 而產生雜訊。 / mπ4二，讯號處理器120例如是音頻訊號編碼/解 二=，/、配置於基板U0之類比接地區114所在區域 、又面且透過基板110之訊號層連接至位於機殼接 7 1269219 I5368twf.doc/g 地區116上的音頻插座130，而音頻插座130例如包 括麥克風插座、制σ八插座、耳機插座以及錄音插座等，用 以連接由麥克風所接收的音頻訊號或將音頻訊號藉由U刺口八 或耳機傳出。 - 值得注意的是，由於訊號處理器120與音頻插座130 • 分別處於不同的類比接地平面，即機殼接地區116係由切 剎基板110在音頻插座丨30上的接地區域所形成的一個獨 % 立的類比接地平面，其與鄰近之類比接地區114相隔一間 距，而電感元件150跨接於間距兩側的類比接地區114與 機殼接地區116，用以避免類比接地區114上的雜訊被帶 ，，殼接地區116之音頻插頭13〇上，以提高訊號傳輸的 口口貝。在本貫施例中，機殼接地區116的面積例如小於等 於類比接地區114的面積。 、此外，濾波元件例如是電感電容濾波器（EC filter) 或其他防電磁干擾之濾波器。濾波元件140〜142之一端耦 接於類比接地區114與機殼接地區116之間，而濾波元件 • 140〜142之另一端例如麵接於用以傳輸音頻插座13〇與訊 ，處理器12G之間訊號往來的訊號線（未緣示）。本發明 .藉由濾、波元件14G〜142可將音頻訊號上的高頻雜訊渡 掉，以達到EMI抑制的效果。 紅上所述，本發明因切割原先類比接地平面在音頻插 座上的部分面積，以形成一個獨立的機殼接地區，其與訊 號處理為所在的類比接地區分開，並配置有多個濾波元件 以及至少-電感元件於類比接地區與機殼接地區之間。因 8 1269219 15368twf.doc/g 此’可避免類比接地區上的雜訊被帶到音頻插座上，且 將音頻訊號上的雜訊渡掉。基於上述’在抑制電磁波干择 之功效上，音頻訊號上的雜訊可有效地降低，立併二 晰，進而提高訊號傳輸的品質。 ...../n 限定ϊίί發Γ已錄佳實闕減如上，鱗並非用以 限疋本电明’任何㈣此技藝者，在不脫離本發[Embodiment] Please refer to the figure, ^ Noise Interference Sound, ♦ which illustrates a suppression motherboard on a preferred embodiment of the present invention. The schematic diagram of the audio circuit 100 with built-in 11A system for controlling the chip is mainly composed of a substrate 10, a signal processor 12A, an audio jack 13〇, a plurality of filters=140 142, and at least one inductive component. 150. In this embodiment, the digital signal on the substrate 110 and the analog signal do not share the same | plane, and the substrate 11 分割 divides the ground area into three regions, = digital connection region 112, analog analog region 114, and - Machine #区Π6 Therefore, the digital signal on the substrate 110 can be transmitted on the signal layer where the number 妾i area/12 is located, and the substrate 11()=signal can be in the analog area 114 and the chassis area ιι6 The .fU tiger layer uploading wheel can avoid noise between signals and generate noise. / mπ4 2, the signal processor 120 is, for example, an audio signal code/solution==, is disposed in the area of the substrate 114 where the analog area 114 is located, and is connected to the signal layer of the substrate 110 to be connected to the chassis 7 1269219 I5368 twf.doc / g audio jack 130 on the area 116, and the audio jack 130 includes, for example, a microphone jack, a sigma socket, a headphone jack, a recording jack, etc., for connecting an audio signal received by the microphone or by using an audio signal U spurs eight or headphones. - It is worth noting that since the signal processor 120 and the audio jack 130 are respectively in different analog ground planes, that is, the chassis region 116 is formed by a grounding area of the brake pad 110 on the audio jack 30 The analog analog ground plane is spaced apart from the adjacent analog region 114 by a distance, and the inductive component 150 is connected across the analog region 114 and the chassis region 116 on both sides of the pitch to avoid analogy on the region 114. The noise is taken, and the audio connector 13 of the area 116 is connected to the mouth to improve the transmission of the signal. In the present embodiment, the area of the cabinet region 116 is, for example, less than the area of the analog region 114. In addition, the filter component is, for example, an electrolytic capacitor filter (EC filter) or other anti-electromagnetic interference filter. One end of the filter components 140-142 is coupled between the analog connection region 114 and the chassis connection region 116, and the other end of the filter component 140 to 142 is, for example, connected to transmit the audio socket 13 and the processor 12G. The signal line between the signals (not shown). According to the present invention, the high frequency noise on the audio signal can be removed by the filtering and wave elements 14G to 142 to achieve the EMI suppression effect. According to the red, the invention cuts a part of the area of the original analog ground plane on the audio socket to form an independent chassis connection area, which is separated from the analogy where the signal processing is located, and is configured with a plurality of filter elements. And at least - the inductive component is between the analog region and the chassis region. Because 8 1269219 15368twf.doc / g this can avoid the noise in the analog area is brought to the audio socket, and the noise on the audio signal is removed. Based on the above-mentioned effect of suppressing the electromagnetic wave dry selection, the noise on the audio signal can be effectively reduced and clearly defined, thereby improving the quality of the signal transmission. ...../n ϊ ί ί ί ί Γ Γ Γ Γ Γ Γ , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,
:範，，當可作些許之更動與潤飾，因此本發明之：確 庫巳圍當視後附之申請專利範圍所界定者為準。 '' 又 【圖式簡單說明】 圖1繪示本發明一較佳實施例之一種 音頻電路的示意圖。 W相干擾之 【主要元件符號說明】 100 110 112 114 116 120 130 抑制雜訊干擾之音頻電路 基板 數位接地區 類比接地區 機殼接地區 訊號處理器 音頻插座 140〜142 ··濾波元件 150 :電感元件: Fan, when a little change and refinement can be made, therefore, the present invention is based on the fact that the scope of the patent application attached to it is subject to the definition of the patent application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of an audio circuit in accordance with a preferred embodiment of the present invention. W-phase interference [Main component symbol description] 100 110 112 114 116 120 130 Audio circuit board for suppressing noise interference Digital bit area Area analog area chassis connection area signal processor audio socket 140~142 ··Filter element 150: Inductance element