1251429 玫、發明說明： 【發明所屬之技術領域】 本發明是有關於一種濾波電路裝置，特別是指一種用 於用戶端電話線上的動態話音分離電路裝置。 【先前技術】 隨著各式網路應用技術的發展，以及網際網路與電子 商務的盛行，大量的聲音、文字、影像、圖片、動晝、線 上遊戲，以及各種多媒體資料的傳輸需求日以益增，寬頻 成了現代社會必然的趨勢。 非對稱數位用戶迴路（Asymmetric Digital SubscriberBACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a filter circuit device, and more particularly to a dynamic voice separation circuit device for a subscriber line. [Prior Art] With the development of various network application technologies, as well as the prevalence of Internet and e-commerce, a large number of voice, text, video, pictures, animation, online games, and various multimedia data transmission needs Benefits increase, broadband has become an inevitable trend in modern society. Asymmetric Digital Subscriber Loop (Asymmetric Digital Subscriber)
Line，ADSL)是一種新興的高速通信技術，它是一種利用傳 統電話線（亦稱雙絞線）來提供高速上網服務的調變/解調 技術。其關鍵觀念在於其上傳與下載的頻寬是不對稱的。 事實上，從網站伺服器至客戶端為下載（下行）的頻寬比較 高，而這樣的設計也是為了配合現有電話網路系統的限 制。簡單地說，ADSL就是在一對電話線中，提供同時傳 送單方向咼容量數位通道及雙方向控制通道，並結合傳統 電話的服務。 但是，由於ADSL技術所使用的是較寬的頻率範圍， 所以在同一條電話線路上就可能產生同時發生的聲音和 數據，這將造成相互之間的干擾。因為語音電話普遍使用 的是0-4KHz的頻段，ADSL數據機將使用更高的頻段來過 濾掉非話音數據。而當電話線上的語音訊號受到八胤數 據流的干擾時，許多話音通過電話傳遞到電話線上的頻率 1251429 就已、、工超過了 4ΚΗΖ。同樣地，由於ADSL數據機所使用 的高頻信號也會被電話機接收到，如此就會在用戶電話機 上引起話筒的噪聲。 基於以上原因，人們使用一話音分離器（splitter)來 5 解決數位與類比訊號相互干擾的介面問題，參閱圖1，為 - ADSL的系、統架構圖。該adsl架構基本上必須具有一 數位線路多工存取器（Digital Subscriber Line Access Multiplexer，DSLAM) 11、一公眾電話網路（pubnc ^lephone Netw〇rk，pSTN)丨2、一連接該數位線路多工存取 1〇 口。U與5亥公眾電話網路12白勺局端話音分離器、13(Splitter at CO side)、至少一與該局端話音分離器丨3連接之電話線 14與"亥電活線14連接的用戶端話音分離器15(Splittei* E side)至少一與該用戶端話音分離器15連接的電 活機16 ’及至少一與該用戶端話音分離器15連接的ADSL 15 數據機17。 由圖1中可知，在該電話線14的兩端皆設有該話音 分離器13、15。而用戶端之話音分離器15是在該電話線 14接入用戶住宅位置的附近，並與該電話線14相連接。 该用戶端話音分離器15將該電話線14分成了兩半，一頭 2〇 舁豕中的電話機16相連接，另一頭則與該ADSL數據機 17相連接。 除了將該電話線14分離之外，該話音分離器15的另 一重要作用就相當於是一個低通濾波器（L〇w pass mter)’只允許頻率為〇-4kHz的語音信號通過該電話機 1251429 5 10 15 16 ’如此一來，該電話機16與該ADSL數據機17在頻率 彻z邊緣所產生的干擾就可以消除。進而使該電話線Μ 土處於低頻段的語音信號過濾出來，使該電話線Μ上的 曰’、數據貝料》開’這好比將—條實體的電話線Μ分 為兩個虛擬的語音及數據兩個通道，以制使用Α·上 網的同時還可以打電話，且語音和數據互不影響的功效。 」而由於4電$機16之輸出阻抗是與該ADSL數 據機17並聯連接，所以該電話機16之輸出阻抗容易遭受 掛上該電話機16之話筒與拿起話筒時之轉換而改變，進 而於20ΚΗζα上頻率表現出開路、短路、電容性、電感性、 共振性或其任何組合，所造成之大範圍變動，此不穩定之 阻抗會嚴重影響ADSL數據信號之速率。 配合參閱圖2,為一習知阻抗阻隔渡波器之電路示意 圖’該阻抗阻隔較器也就是圖1+的用戶端話音分離器 15’其目的是為了有效的消除家巾電話設備所造成八咖 數據傳輸的干擾，而我國專利公告編號第47彻5、48_ 號「阻抗阻隔濾波器」發明專利案中所揭露者，亦是屬於 此類型之阻抗阻隔濾波器。 、 但疋，在该阻抗阻隔濾波器的電路部份，由於其由電 話線路（Line)端看入之第一顆元件並非抗流元件，因而會 影響傳統電話線上的差動訊號，而無法確實阻絕共模二 訊。再者，由於該阻抗阻隔濾波器係設置有兩個感應切換 關ΚΙ、K2’因此若當該用戶之電話機16未使用時，其 ADSL數據機17的傳輸品質也較差。 、 20 1251429 此外，由於習知之阻抗阻隔濾波器電路當中，其所有 之濾波電感L1〜L5均是將兩股繞線分別纏繞於兩個個別的 磁性鐵心上，所以在實際作動時，該二感應開關κι、Κ2 進行切換，會偶有誤動作之情況產生，反而會嚴重地限制 或降低數位資料的傳輸速率。 【發明内容】 一〜π从I4且多邑且模 且改善ADSL傳輸品f，並有效降低感應開關城 u吳動作之機率的動態話音分離電路裝置。 ίο 15 於是，本發明之動態話音分離電路裝置，是連接於一 具有複數電話機及上網設備之用戶電話線路上該動能节 :分離電路裝置包含：-共模扼流電路、一第一渡；電 、n波電m波電路，及—開關電路。 *該共模扼流電路具有—與該f話線路電性連接的抗 机線圈’可抑制該電話線上之共模雜訊。 扼流電路電性連接，並具有—第-_感 二★μ弟一濾波電路與該第_濾波電路電性連接，並具有 ::濾波電感器、二分別與該第二濾波電感器電性連接 連二：遽波Γ，二分別與該第一、二遽波電容電性 „ w,, Α —濾波電阻，及-與該第二濾波電感器並聯 §又置的第一感應電容。 奸該第三濾、波電路與該第二濾、波電路電性連接，並具有 第二濾波電感器、二分別盥 …二 刀乃嬉弟二濾波電感器電性連接 弟二、四濾波電容，及一盥兮笛—、金、士 + Α , Η β弟二濾波電感器並聯設置 20 1251429 的第二感應電容。該開關電路介於該第二濾波電路與該第 三濾波電路之間’並具有一限流電阻、一串聯該限流電阻 的第三感應電容’及—串聯該第三感應電容的磁簧開關。 5 10 15 本發明之功效在於當該用戶之電話機未使用時，該電 話線路上的直流電流較小，該磁簧開關為開路狀態，直流 電流無法流經該第三感應電容，而使整體之動態話音分離 電路農置電容效應較小，可降低電話分機使用時的負載效 應。相對地，當該電話機使用時，直流電流較高，流經該 第二較電路的直流錢㈣應該磁I帛關短路而導 通’直流電流對該第三感應電容充電，而提高該動態話音 分離電路裝置的整體電容效應，可有效改料傳輸的通 吕fL J??質〇 【實施方式】 、有關本發明之前述及其他技術内容、特點與功效，在 乂下配合芩考圖式之較佳實施例的詳細說明中，將可清楚 的明白。 翏閱圖3，本發明之動態話音分離電路裝置，是連接 於一具有複數電話機及上網設備之用戶電話線路上，該動 態話音分離電路裝置包含：一共模扼流電路2 〇、—第一X濾 ，電路30第一 /慮波電路40、一第三濾、波電路5〇，及 開關電路60。在本較佳實施例令，該上網設備為一 數據機。 首先，在說明前要注意的是，本段僅介紹上述電路間 的連結關係與功效，至於電路元件㈣動作容後再述。 20 1251429 忒共模扼流電路20與該電話線路電性連接，並具有 、抗流線圈T1。該抗流線圈T1是可因自感作用而妨礙脈 1直流電流流動的電感，所以串接於該用戶之電話線上 2，可抑制該電話線上之共模雜訊（(：〇111111〇11馗()如1^(^0。 其中，該抗流線圈τι是具有兩股抗流繞線T1_i、T1-2， 且忒一抗流繞線Tl-1、Τ1-2是纏繞在同一磁性鐵心上。 該第一濾波電路30與該共模扼流電路2〇電性連接， ::/、有第濾波電感斋L1。該第一濾波電感器L1為互 感式設計，並具有兩股第一繞線Ll-1、L1-2，且該二第一 心線L1 -1、l 1 -2是纏繞在同一磁性鐵心上。主要是作為數 位/類比訊號隔離與阻抗匹配之用。 忒第一濾波電路40與該第一濾波電路3〇電性連接， ' , 有第一濾波電感裔L2、二分別與該第二濾波電感器 電座連接之第一、二渡波電容c 1、C2，二分別與該第 —、二濾波電容cn、C2電性連接的第一、二濾波電阻Ri、 R2及一與该第二濾波電感器乙2並聯設置的第一感應電 C5其中，該第二濾波電感器L2具有兩股第二繞線 1 [2 2，且该二第二繞線L2-1、L2-2是纏繞在同一磁 性鐵心上。 該第三濾波電路50與該第二濾波電路40電性連接， 及具有一第二濾波電感器L3、二分別與該第三濾波電感器 U電性連接的第三、四濾波電S C3、C4，及-與該第三 濾波電感為L3並聯設置的第二感應電容C7。其中，該第 二濾波電感器L3亦具有兩股第三繞線[3-1、L3-2，且該 1251429 二第三繞線L3-1、L3-2是纏繞在同一磁性鐵心上。 5 10 15 20 該開關電路60分別與該第二濾波電路40及該第三滤 波電路5G私性連接，並具有_限流電阻、—串聯該限 机電阻R3的第三感應電容C6，及—串聯該第三感應電容 C6的磁簧開關K1。在本較佳實施例中，該開關電路⑼更 具有-與該磁簧開關K1並聯設置的齊納二極體z卜用以 避免電壓過大（250V以上）造成該磁簧開關幻誤動作。 依據上述δ兒明，本發明之動態話音分離電路裝置，主 要疋用以連接一使用者之複數電話機以及上網設備。其目 的在於阻絶各電活分機之間的共振效應，以絕對阻隔數據 流及語音流相互干擾的頻率阻抗。所以，在下文中請配合 多閱圖4來作δίΐ號隔離與阻抗匹配的工作原理說明。 圖4為本發明動態話音分離電路裝置使用於一 adSL 用戶端的線路架構圖，ADSL用戶端的線路架構大致上包 含有電^局3 1、至少一連接至該電信局3 1的電話線 32、一與該電話線32相連接的話音分離器33、二與該話 音分離器33連接之電話機34，及一 ADSL數據機35。本 發明之動態話音分離電路裝置是在該電話線32接入用戶 住宅位置的附近，與該電話線32相連接並將該電話線32 分成了兩半，一頭與家中之該二電話機34相連接，另一 頭則與該ADSL數據機35連接。其中，該ADSL數據機 35與圖3中該電話線32之Line5與Line2中的A、B兩點 相互連接。 參閱圖3、4，及5，當該使用者之電話機34未使用 10 1251429 時（話筒掛上/On-hook)，該電話線路32上有較高的直流電 壓與較低的直流電流，此時該磁簧開關K1為開路（open) 狀態’因直流電流無法流經該第三感應電容C6，使得該開 關電路60(限流電阻R3、第三感應電容C6，及磁簣開關 5 K1)並未與整體之動態話音分離電路裝置的線路形成迴 路，而處於浮接（Floating)狀態。由該電話線32之Une5 與Line2端看入之電容效應較小（僅該第一感應電容C5與 該第二感應電容C7)，所以將此狀態（0n-h〇〇k)的動態話音 分離電路裝置連接於該電話線32上時，可有效將低其負 10 载效應，增加該電話機34的使用數目。 參閱圖3、4，及6，相對地，當該電話機34使用時（話 筒拿起/Off-hook)，該電話線32上會有較低的直流電壓與 較高的直流電流，此時流經該第二濾波電路4〇的直流電 流（通常為20mA以上，因地區而異）會產生磁場感應使該 15 磁簧開關K1呈短路（Short)狀態（實際接線位置位於該第二 濾波電路40底下），而使該開關電路6〇導通，該限流電阻 R3與該第三感應電容C6跨接於該電話線32上。此時， 該電話線32之Line5與Line2端看入之電容效應較大（含 。亥第一、一、二感應電容C5、C7、C6)，可增加該adsl 20 數據機％與該電話機34訊號之隔離程度，改善該電話機 34之通汛品質與ADSL數據機35的傳輸特性。 本發明之動態話音分離電路裝置是屬於濾波器之應 用，並以動態開關的方式設計，與習知傳統的話音分離器 有所差異。根據該電話機34的使用狀況在話筒掛上或拿 11 1251429 起時，會變更其阻抗特性（impedance)，以符合該使用者擁 有複數電話機34的需求（一機〇ff_h〇〇k，其餘為〇n h幻 此外，本發明藉由在該電話線34看入的首端設置該 抗流線圈Tl(Choke)，藉以阻絕共模雜訊，同時將感應切 5 換開關（即磁簧開關Kl)簡化設置成僅有一個，以有效改盖 該電話機34未使用時之ADSL傳輸品質，並將電路當中 所有的第-、=、三濾波電感器L1〜L3採用互感式設計， 藉以降低該磁簧開關K1切換誤動作之機率。 歸納上述，本發明之動態話音分離電路裝置，藉由前 10 揭技術特徵，不僅不影響用戶電話線32上之差動訊號， 逛能有效阻絕共模雜訊，且亦以動態開關的方式切換該複 數電話機34並掛時之通話品質，來改善當該複數電話機 34未使用時之ADSL傳輸品質，並能有效降低該磁菁開關 K1切換誤動作之機率，故確實能達到本發明之目的。 15 惟以上所述者，僅為本發明之較佳實施例而已，當不 能以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及發明說明書内容所作之簡單的等效變化與修飾，皆 應仍屬本發明專利涵蓋之範圍内。 20 12 1251429 【圖式簡單說明】 圖1是一 ADSL的系統線路架構圖； 圖2是一習知阻抗阻隔濾波器之電路示意圖·， 圖3是本發明動態話音分離電路裝置之較佳實施例的 5 電路示意圖； 圖4是一 ADSL用戶端的系統架構圖，說明以本發明 之較佳實施例連接用戶電話線時，電話機之使用狀況與阻 抗特性的改變； 圖5是一電壓_電流波形示意圖，說明以本發明之較佳 10 實施例連接用戶電話線時，電話機未使用時（話筒掛上 /On-hook)之使用狀況與阻抗特性的改變；及 圖6是一電壓-電流波形示意圖，說明以本發明之較佳 貫施例連接用戶t話線日夺，電話機使用時（話筒拿起 /Off-hook)之使用狀況與阻抗特性的改變。 15 13 1251429 【圖式之主要元件代表符號說明】 2 0 共模扼流電路 L1 第一濾波電感器 30 第一濾波電路 L 2 第二濾波電感器 40 第二濾波電路 L3 …第三濾波電感器 5 0 第三濾波電路 T1 1 抗流繞線 60 開關電路 T1-2 抗流繞線 3 1 電信局 L1 -1 第一繞線 3 2… …電話線 L1-2 …第一繞線 3 3 話音分離器 L2-1 第二繞線 3 4 …電話機 L 2 _ 2 … …第二繞線 3 5 …ADSL數據機 L3-1 第三繞線 C1 …第一濾波電容 L3-2 …第三繞線 C2…… …第二濾波電容 了 1,X 抗流線圈 C3 第三渡波電容 K1 …磁簧開關 C4 第四濾波電容 R1 …第一濾波電阻 C5 第一感應電容 R2 第二濾波電阻 C 6 第三感應電容 R3 …限流電阻 C 7 …第二感應電容 14Line, ADSL is an emerging high-speed communication technology that is a modulation/demodulation technology that uses traditional telephone lines (also known as twisted pair) to provide high-speed Internet access. The key idea is that the bandwidth of its upload and download is asymmetric. In fact, the bandwidth from the web server to the client for download (downstream) is relatively high, and this design is also designed to match the limitations of existing telephone network systems. Simply put, ADSL is a pair of telephone lines that provide simultaneous transmission of single-directional 咼 capacity digital channels and dual-directional control channels, combined with traditional telephone services. However, since the ADSL technology uses a wide frequency range, simultaneous sounds and data may be generated on the same telephone line, which may cause mutual interference. Because voice telephony is commonly used in the 0-4 kHz band, ADSL modems will use higher frequency bands to filter out non-voice data. When the voice signal on the telephone line is disturbed by the gossip data stream, the frequency of many voices transmitted to the telephone line through the telephone is 1251429, and the number of workers exceeds 4. Similarly, since the high frequency signal used by the ADSL modem is also received by the telephone, the microphone noise is caused on the subscriber's telephone. For the above reasons, people use a voice splitter (splitter) to solve the interface problem of digital and analog signals interfering with each other. Referring to Figure 1, it is - ADSL system architecture diagram. The adsl architecture basically has to have a Digital Subscriber Line Access Multiplexer (DSLAM) 11, a public telephone network (pubnc ^lephone Netw〇rk, pSTN) 丨 2, a connection to the digital line Worker access 1 port. U and 5H public telephone network 12, the split voice at the side, 13 (Splitter at CO side), at least one telephone line 14 connected to the central office voice separator 与3 and "Haidian live line 14 connected subscriber-side voice splitter 15 (Splittei* E side) at least one of an electric motor 16' connected to the subscriber-side voice splitter 15 and at least one ADSL 15 connected to the subscriber-side voice splitter 15 Data machine 17. As can be seen from Figure 1, the voice separators 13, 15 are provided at both ends of the telephone line 14. The voice splitter 15 of the subscriber end is connected to the subscriber line in the vicinity of the telephone line 14 and is connected to the telephone line 14. The subscriber-side voice splitter 15 divides the telephone line 14 into two halves, a telephone 16 in one head is connected, and the other is connected to the ADSL modem 17. In addition to separating the telephone line 14, another important function of the voice splitter 15 is equivalent to a low pass filter (L〇w pass mter) that allows only voice signals having a frequency of 〇-4 kHz to pass through the telephone. 1251429 5 10 15 16 'As such, the interference generated by the telephone 16 and the ADSL modem 17 at the edge of the frequency can be eliminated. In turn, the voice signal of the telephone line in the low frequency band is filtered out, so that the telephone line on the telephone line is opened, which is like dividing the telephone line of the physical entity into two virtual voices and Two channels of data, in order to use the Internet, you can also make calls, and the voice and data do not affect each other. And since the output impedance of the 4 electric machine 16 is connected in parallel with the ADSL data machine 17, the output impedance of the telephone 16 is easily changed by the conversion of the microphone of the telephone 16 and the pick up of the microphone, and further changes to 20 ΚΗζα. The upper frequency exhibits a wide range of variations due to open circuit, short circuit, capacitive, inductive, resonant, or any combination thereof. This unstable impedance can seriously affect the rate of the ADSL data signal. Referring to FIG. 2, it is a circuit diagram of a conventional impedance blocking waver. The impedance blocking comparator is also the user-side voice separator 15' of FIG. 1+. The purpose is to effectively eliminate the eight-piece telephone device. The interference of coffee data transmission, and the disclosure of the invention patent of the Patent No. 47, No. 5, 48_ "Impedance Barrier Filter" is also an impedance blocking filter of this type. However, in the circuit portion of the impedance blocking filter, since the first component viewed from the telephone line is not a current blocking component, it affects the differential signal on the conventional telephone line, and cannot be sure. Block the common mode two news. Furthermore, since the impedance blocking filter is provided with two inductive switching switches, K2', if the telephone 16 of the user is not in use, the transmission quality of the ADSL modem 17 is also poor. 20 1251429 In addition, in the conventional impedance blocking filter circuit, all of the filter inductors L1 to L5 are wound around two separate magnetic cores, so when actually operating, the two sensing Switching between κι and Κ2 will occasionally cause a malfunction, which will severely limit or reduce the transmission rate of digital data. SUMMARY OF THE INVENTION A dynamic voice separation circuit device that reduces the probability of inductive switching, and improves the ADSL transmission product f from 1 to π. Ίο 15 Thus, the dynamic voice separation circuit device of the present invention is connected to a kinetic energy section of a subscriber telephone line having a plurality of telephones and a network access device: the separation circuit device comprises: a common mode turbulence circuit, a first crossing; Electrical, n-wave electric m-wave circuit, and - switching circuit. * The common mode choke circuit has an anti-machine coil ' electrically connected to the f line to suppress common mode noise on the telephone line. The choke circuit is electrically connected, and has a ---------------the filter circuit is electrically connected to the first filter circuit, and has: a filter inductor, two respectively, and the second filter inductor The connection is connected to two: 遽 wave Γ, two respectively with the first and second chopper capacitors „ w,, Α — filter resistors, and - in parallel with the second filter inductor § again set the first sense capacitance. The third filter and wave circuit is electrically connected to the second filter and wave circuit, and has a second filter inductor and two separate 盥... two knives are two brothers and two filter inductors are electrically connected to the second and fourth filter capacitors. And a flute-, gold, 士+ Α, Η β-two filter inductors are arranged in parallel with a second sense capacitor of 20 1251429. The switch circuit is between the second filter circuit and the third filter circuit' a third sense capacitor having a current limiting resistor connected in series with the current limiting resistor and a reed switch connected in series with the third inductor. 5 10 15 The effect of the invention is that when the user's telephone is not in use, the telephone The DC current on the line is small, and the reed switch is on. In the state of the road, the DC current cannot flow through the third sensing capacitor, so that the overall dynamic voice separation circuit has less effect on the agricultural capacitor, which can reduce the load effect when the telephone extension is used. In contrast, when the telephone is used, the DC The current is relatively high, and the DC money flowing through the second comparator circuit (4) should be short-circuited by the magnetic device to turn on the 'direct current to charge the third sensing capacitor, and the overall capacitance effect of the dynamic voice separation circuit device can be effectively improved. The above-mentioned and other technical contents, features and effects of the present invention will be described in the detailed description of the preferred embodiment of the present invention in conjunction with the preferred embodiment of the present invention. It can be clearly understood that, in view of FIG. 3, the dynamic voice separation circuit device of the present invention is connected to a subscriber telephone line having a plurality of telephones and an Internet access device, the dynamic voice separation circuit device comprising: a common mode choke circuit 2 〇, - first X filter, circuit 30 first / wave circuit 40, a third filter, wave circuit 5 〇, and switch circuit 60. In the preferred embodiment, the Internet device First, before the explanation, it should be noted that this paragraph only introduces the connection relationship and efficiency between the above circuits, and the circuit components (4) are described later. 20 1251429 忒 Common mode choke circuit 20 and the phone The line is electrically connected and has a choke coil T1. The choke coil T1 is an inductor that can interfere with the flow of the direct current of the pulse 1 due to self-inductance, so that the telephone line 2 is connected in series to the user, and the telephone line can be suppressed. Common mode noise ((: 〇111111〇11馗() such as 1^(^0. Among them, the anti-flow coil τι has two anti-flow windings T1_i, T1-2, and the first anti-flow winding Tl-1 and Τ1-2 are wound on the same magnetic core. The first filter circuit 30 is electrically connected to the common mode choke circuit 2, ::/, and has a filter inductor L1. The first filter inductor L1 is of a mutual inductance design and has two first windings L1-1, L1-2, and the two first core wires L1 -1, l 1 -2 are wound on the same magnetic core. . Mainly used for digital/analog signal isolation and impedance matching. The first filter circuit 40 is electrically connected to the first filter circuit 3, and has a first filter inductor L2 and a first and second wave capacitor c1 connected to the second filter inductor base. C2, two first and second filter resistors Ri and R2 electrically connected to the first and second filter capacitors cn and C2, respectively, and a first induction power C5 disposed in parallel with the second filter inductor B2, wherein The second filter inductor L2 has two second windings 1 [2 2, and the two second windings L2-1, L2-2 are wound on the same magnetic core. The third filter circuit 50 is electrically connected to the second filter circuit 40, and has a second filter inductor L3, and a third and fourth filter power S C3 electrically connected to the third filter inductor U, respectively. C4, and - a second sense capacitor C7 disposed in parallel with the third filter inductor L3. The second filter inductor L3 also has two third windings [3-1, L3-2, and the 1251429 two third windings L3-1, L3-2 are wound on the same magnetic core. 5 10 15 20 The switch circuit 60 is respectively connected to the second filter circuit 40 and the third filter circuit 5G, and has a current limiting resistor, a third sense capacitor C6 connected in series with the limit resistor R3, and The reed switch K1 of the third sensing capacitor C6 is connected in series. In the preferred embodiment, the switch circuit (9) further has a Zener diode Z disposed in parallel with the reed switch K1 for avoiding excessive voltage (above 250V) causing the reed switch to malfunction. According to the above-mentioned delta, the dynamic voice separation circuit device of the present invention is mainly used for connecting a plurality of telephones of a user and an internet device. The goal is to block the resonance effects between the electrical extensions to absolutely block the frequency impedance of the data stream and the voice stream. Therefore, in the following, please refer to Figure 4 for more information on the working principle of δίΐ isolation and impedance matching. 4 is a circuit diagram of a dynamic voice separation circuit device used in an adSL user terminal according to the present invention. The circuit structure of the ADSL subscriber end generally includes a circuit board 31, at least one telephone line 32 connected to the telephone office 31, A voice splitter 33 coupled to the telephone line 32, a telephone set 34 coupled to the voice splitter 33, and an ADSL modem 35. The dynamic voice separating circuit device of the present invention is connected to the telephone line 32 in the vicinity of the telephone line 32 to the user's home location, and divides the telephone line 32 into two halves, one end being associated with the two telephones 34 in the home. The other end is connected to the ADSL modem 35. The ADSL modem 35 is connected to two points A and B in Line 5 and Line 2 of the telephone line 32 in FIG. Referring to Figures 3, 4, and 5, when the user's telephone 34 does not use 10 1251429 (microphone hanging / On-hook), the telephone line 32 has a higher DC voltage and a lower DC current. When the reed switch K1 is in an open state, the DC current cannot flow through the third sensing capacitor C6, so that the switching circuit 60 (current limiting resistor R3, third sensing capacitor C6, and magnetic switch 5 K1) It does not form a loop with the line of the overall dynamic voice separation circuit device, but is in a floating state. The capacitance effect seen by the Une5 and Line2 terminals of the telephone line 32 is small (only the first sensing capacitor C5 and the second sensing capacitor C7), so the dynamic voice of this state (0n-h〇〇k) When the discrete circuit arrangement is coupled to the telephone line 32, it can effectively reduce its negative 10 load effect and increase the number of uses of the telephone set 34. Referring to Figures 3, 4, and 6, in contrast, when the telephone 34 is in use (microphone pick-up/off-hook), the telephone line 32 will have a lower DC voltage and a higher DC current. The DC current of the second filter circuit 4 (usually 20 mA or more, depending on the region) generates magnetic field induction to cause the 15 reed switch K1 to be in a short state (the actual wiring position is located under the second filter circuit 40). The switch circuit 6 is turned on, and the current limiting resistor R3 and the third sensing capacitor C6 are connected across the telephone line 32. At this time, the capacitance effect of the Line 5 and Line 2 terminals of the telephone line 32 is relatively large (including the first, first, and second sensing capacitors C5, C7, and C6), and the adsl 20 data machine % and the telephone 34 can be increased. The degree of isolation of the signal improves the overnight quality of the telephone 34 and the transmission characteristics of the ADSL modem 35. The dynamic voice separation circuit device of the present invention is applied to a filter and is designed in a dynamic switching manner, which is different from the conventional voice separator. According to the use condition of the telephone 34, when the microphone is hung up or taken 11 1251429, its impedance characteristic is changed to meet the requirement of the user having the plurality of telephones 34 (one machine 〇 ff_h〇〇k, the rest is 〇 In addition, the present invention sets the choke coil T1 (Choke) at the head end of the telephone line 34 to block common mode noise, and at the same time simplifies the inductive cut switch (ie, the reed switch K1). It is set to only one to effectively change the ADSL transmission quality when the telephone 34 is not in use, and all the first,, and third filter inductors L1 to L3 in the circuit are designed to be mutually inductive, thereby reducing the reed switch. K1 switches the probability of malfunction. In summary, the dynamic voice separation circuit device of the present invention, by the features of the first 10, not only does not affect the differential signal on the user's telephone line 32, but also effectively blocks the common mode noise. The call quality of the plurality of telephones 34 is also switched in a dynamic switch mode to improve the ADSL transmission quality when the plurality of telephones 34 are not in use, and the switching error of the magnetic switch K1 can be effectively reduced. It is a matter of fact that it is possible to achieve the object of the present invention. The above is only the preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto, that is, the scope of patent application according to the present invention. And the simple equivalent changes and modifications made by the contents of the description of the invention are still within the scope of the patent of the present invention. 20 12 1251429 [Simplified illustration of the drawing] FIG. 1 is a circuit diagram of an ADSL system; FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 3 is a schematic diagram of a circuit of a preferred embodiment of the dynamic voice separation circuit device of the present invention; FIG. 4 is a system architecture diagram of an ADSL subscriber terminal, illustrating a preferred embodiment of the present invention. The embodiment shows a change in the usage and impedance characteristics of the telephone when the subscriber's telephone line is connected; FIG. 5 is a schematic diagram of a voltage_current waveform illustrating the use of the telephone when the telephone is not in use when connecting the subscriber's telephone line in the preferred embodiment of the present invention. a change in the usage and impedance characteristics of the on/hook; and FIG. 6 is a schematic diagram of a voltage-current waveform illustrating a preferred embodiment of the present invention The usage status and impedance characteristics of the user's telephone line (the microphone pick up/off-hook) are changed. 15 13 1251429 [The main components of the diagram represent the symbol description] 2 0 Common mode choke circuit L1 First filter inductor 30 first filter circuit L 2 second filter inductor 40 second filter circuit L3 ... third filter inductor 5 0 third filter circuit T1 1 anti-current winding 60 switch circuit T1-2 anti-flow winding Line 3 1 telecommunication office L1 -1 first winding 3 2 ... telephone line L1-2 ... first winding 3 3 voice splitter L2-1 second winding 3 4 ... telephone L 2 _ 2 ... ... Two windings 3 5 ... ADSL data machine L3-1 third winding C1 ... first filter capacitor L3-2 ... third winding C2 ... ... second filter capacitor 1, X choke coil C3 third wave capacitor K1 ... reed switch C4 fourth filter capacitor R1 ... first filter resistor C5 first sense capacitor R2 second filter resistor C 6 third sense capacitor R3 ... current limiting resistor C 7 ... second sense capacitor 14