M351559 八、新型說明： 【新型所屬之技術領域】 本創作涉及一種網路介面電路，特別是涉及一種應用於電連接 器並具有浪湧保護功能之網路介面電路。 【先前技術】 於2004年4月28日公開之美國專利公開第2005/0243483號 第六圖揭示了 一種用於連接局域網（LAN)線纜端與電子設備電路板 端之介面電路，該介面電路具備浪湧保護功能，該介面電路由一個 三線共模扼流圈（3-Wire CMC)、一隔離變壓器、一接地網路及一電 壓抑制裝置組成。三線共模扼流圈連接至電路板端並具有一第三線 圈及兩外側線圈，變壓器則連接至線纜端並具有初級線圈與次級線 圈，三線共模扼流圈之兩個外側線圈連接至變壓器初級線圈之兩 端，第三線圈則與初級線圈之中間抽頭相連，電壓抑制裝置也連接 至扼流圈之兩外側線圈。變壓器之次級線圈具有中間抽頭，該中間 抽頭連接至接地網路，該接地網路由一電阻與電容-聯後接地。該 介面電路為實現浪湧保護功能，變壓器之次級線圈係採用客制化 (Fortified)線圈，例如調節次級線圈尺寸。 雖，變壓器採用客制化線圈可以增加次級線圈傳輸電流之能 力，惟，浪湧於次級線圈產生之大電流需要通過接地網路傳輸至 地，而接地網路之電阻於經過大電流時會發生爆裂，為了防止此種 現象則需要採用較大尺寸之電阻，相應地，會增加整個介面電路之 體積。 6 M351559 【新型内容】 本創作之目的在於提供— 網路介面電路。。〃帛具有防止浪_能並且體積小之 為實現上述目的，本創作採用如下技術方案：―網 路，用以連接第一側線路盥 1面电 一弟—側線路，其包括：一變壓器，兌 =原邊線圈及副邊線圈，原邊線圈連接至第—線側線路，副邊線圈匕 =兩個連接端及-個中間—聽扼流圈， = 圈、第二線圈及第三線圈，該第-及第二線圈連接前述副邊:圈= 之中間抽頭，另一端直：圈之一端連接至前述副邊線圈 糕直接與—個電容連接後接地丨一浪湧保謨哭， 其連接至前述原邊線圈。 °° 為實現上述目的，本創作亦可採用如下技術方案： 一網路介面電路，心連接電路板麟路與傳輸、_端線路， 其包括第一傳輸通道及第二傳輸通道，各傳輪通道分別包括：一個 變壓器’其包括原邊線圈及副邊線圈，該原邊線圈連接至第一線侧 線路，該副邊線圈具有一中間抽頭；-個共模扼流圈，其—侧連接 至前述變壓器之副邊線圈，另-側連接至傳輸線魔端線路’該共模 扼流圈包括第-線圈、第二線圈及第三線圈，該第三線圈之一端連 接至所述副邊線圈之中間抽頭，另—端直接連接至—電容後接地，· 該介面電路亦包括複數浪_制器，其中—個—浪_制器與前述 Μ器之原邊線圈連接，—個浪湧抑制器與前述共模扼流圈之第一 線圈與第二線圈連接。 相對於現有技術，本創作之介面電路共模扼流圈之第三線圈直 接與電容連接後接地，因省略了電阻而可以避免電阻爆裂，同時減 7 M351559 ’j、介面電路之體積 【實施方式】 弟圖，本創作提供一種濾波電路1係一種網路介面電 路用於連接電路板端ιοί與線纜端102，該濾波電路！包括第一 通道 11、當-、s、、，< 弟一通運12、第三通道21、第四通道22。 月 > 閱第一圖，符合本創作思想之一種介面電路1〇〇用以連接 太、罔之電路板端1〇1—第—側線路與傳輸線纜端1〇2一第二側線 路面電路100包括一個隔離變壓器2、一個共模扼流圈3、 個浪/勇抑制器4及—個接地網路5。隔離變壓器2包括初級線圈 21與次級線圈23。初級線圈21之兩連接端211、213連接至電路 板端1〇1 ’並且浪湧抑制器4連接至該兩連接端21卜213，同時浪 湧抑制器4進行接地。次級線圈23具有兩個連接端23卜233與一 中間抽頭235。共模扼流圈3包括位於外側之第—線圈3卜第二線 圈3及位於中間之弟二線圈％，該等線圈纏繞於同一個磁芯上。 第線圈3卜第二線圈33之一側連接至變塵器次級線圈23之兩 連接端23卜233 ’第-線圈3卜第二線圈％之另一側則連接至傳 輸線缓i而102。第三線圈35之一端則連接至變壓器次級線圈23之 1抽頭235帛—線圈35之另—端則連接至接地網路$。接地網 路5僅包括一個電容51與地連接，共模扼流圈3之第三線圈％則 與該電容51串聯後接地。 傳輸線鏡端102由於雷電、靜電釋放等原因會產生浪渴，相應 地’與傳輸線端102直接相連之共模扼流圈3與變壓器2之次級線 圈23上會產生電流豸電流㈣會由共模扼流圈3之第三線 M351559 圈35與接地網路5傳輸至大地。同時變壓器2之初級線圈也會感 應產生電流浪湧，該電流浪湧則由於浪湧抑制器4來進行抑制7從 而避免對電路板端之電子元件造成損壞。為了加強抑制浪湧功效， 該介面電路⑽還可以增加一個-浪湧抑制器，該浪渴抑制器連接至 共模扼流圈3之兩外側線圈。 4閱第二圖’第二圖係將第_圖所示電路圖應用於麵 B紙-T乙太網（Ethernet)之介面電路2〇〇，該介面電路2⑽連接電路 板端101與傳輸線窺端1〇2，該介面電路包括四個傳輪通道謝、 期、205、207。與圖！所示介面電路⑽相比，各傳輪通道加、 期、205、207之共模扼流圈3之第一線圈31、第二線圈幻連接 至一浪汤抑制器4,該浪渴抑制器4可以加強各通道抑制浪演之效 果。該介面電路採用集成式浪湯抑制器，相鄰兩個傳輸通道 2〇1與203之勒級線圈21之兩連接端23卜233連接至同—浪勇抑 制器4，共模扼流圈3之第一線圈31、第二線圈％連接至同^良 /勇抑制盗4’並各浪消抑制器4接地。相鄰兩個傳輸通道⑽、撕 與傳輸通道201、203之結構相同。 石月一併參閱第三圖至第六圖，所示為圖2所示介面電路分 別接85歐姆、歐姆及115歐姆負载時之回程損耗。第： 不為傳輸通道謝之回程損耗，其中線5〇〇為麵“Μ乙 所規定的標準值，線511為傳輸通道2〇1接Μ歐姆時之回程損耗 512為傳輪通道201接歐姆時之回程損耗曲線，線 為傳輸通運201接115歐姆時之回程損耗曲的，^ 如、512及513均線上5〇〇以上 、f °以有出線 U乙太網刪。㈣所示物^賴可以滿足麵 马钱通迢2的之回程損耗，線 M351559 531、532及533分別為傳輸通道203接85歐姆、100歐姆及115 歐姆時之回程損耗曲線，該等曲線均線上500以上，即傳輪通道 203滿足1000 Base-T乙太網之要求。第五圖所示為傳輸通道2〇5 之回程損耗，線551、552及553分別為傳輸通道205接85歐姆、 100歐姆及115歐姆時之回程損耗曲線，該等曲線均線上5〇〇以上， 即傳輸通道205滿足1000 Base-T乙太網之要求。第六圖所示為傳 輸通道207之回程損耗，線571、572及573分別為傳輸通道2〇7 接85歐姆、100歐姆及115歐姆時之回程損耗曲線，該等曲線均 線上500以上，即傳輸通道207滿足1000 Base-T乙太網之要求。 傳統具有抑制浪湧功能之網路介面電路，在與傳輸線纜端1〇2 相連的一側採用電阻與電容串聯後接地之接地網路，相比較而言， 以上網路介面電路100、200之共模扼流圈3之第三線圈35直接與 一個電容51連接後接地，該等網路介面電路2〇〇、3〇〇省去了—個M351559 VIII. New Description: [New Technology Field] This creation relates to a network interface circuit, and more particularly to a network interface circuit applied to an electrical connector and having a surge protection function. [Prior Art] The sixth figure of US Patent Publication No. 2005/0243483, published on Apr. 28, 2004, discloses a interface circuit for connecting a local area network (LAN) cable end to an electronic device circuit board end, the interface circuit With surge protection, the interface circuit consists of a three-wire common mode choke (3-Wire CMC), an isolation transformer, a grounding network, and a voltage suppression device. The three-wire common mode choke is connected to the circuit board end and has a third coil and two outer coils, and the transformer is connected to the cable end and has a primary coil and a secondary coil, and two outer coils of the three-wire common mode choke are connected. To the two ends of the primary coil of the transformer, the third coil is connected to the center tap of the primary coil, and the voltage suppression device is also connected to the two outer coils of the choke coil. The secondary winding of the transformer has a center tap that is connected to a grounding network that routes a resistor and capacitor-to-ground. The interface circuit provides surge protection. The secondary winding of the transformer uses a Fortified coil, such as adjusting the secondary coil size. Although the transformer uses a customized coil, it can increase the ability of the secondary coil to transmit current. However, the large current generated by the surge in the secondary coil needs to be transmitted to the ground through the grounding network, and the resistance of the grounding network is subjected to a large current. A burst will occur. To prevent this, a larger size resistor is required, which in turn increases the volume of the entire interface circuit. 6 M351559 [New Content] The purpose of this creation is to provide a network interface circuit. . 〃帛 防止 防止 _ _ _ _ _ _ _ _ _ _ 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本For the primary coil and the secondary coil, the primary coil is connected to the first line side line, the secondary side coil 匕 = two connection ends and - the middle - the listening choke, the = coil, the second coil and the third coil The first and second coils are connected to the secondary side: the middle tap of the circle=the other end is straight: one end of the ring is connected to the secondary side coil, and the first side coil is directly connected with the capacitor, and the grounding is surged and crying. Connected to the aforementioned primary coil. °° To achieve the above objectives, the present invention can also adopt the following technical solutions: a network interface circuit, a core connection circuit board and transmission, _ terminal line, which includes a first transmission channel and a second transmission channel, each of the transmission wheels The channels respectively comprise: a transformer comprising: a primary coil and a secondary coil, the primary coil being connected to the first line side line, the secondary coil having a center tap; a common mode choke, the side connection To the secondary side coil of the transformer, the other side is connected to the transmission line magic end line. The common mode choke coil includes a first coil, a second coil and a third coil, and one end of the third coil is connected to the secondary coil The middle tap is connected to the other end directly to the capacitor and then grounded. · The interface circuit also includes a complex wave controller, wherein the -wave controller is connected to the primary coil of the aforementioned device, and a surge suppression The first coil and the second coil of the common mode choke coil are connected to the second coil. Compared with the prior art, the third coil of the common mode choke coil of the present invention is directly connected to the capacitor and grounded, and the resistance burst can be avoided because the resistor is omitted, and the volume of the interface circuit is reduced by 7 M351559 'j, the volume of the interface circuit. 】 Brother, this creation provides a filter circuit 1 is a network interface circuit for connecting the board end ιοί and cable end 102, the filter circuit! The first channel 11, the -, s, ,, < the first one, the third channel 21, and the fourth channel 22 are included. Month> Read the first figure, an interface circuit 1 conforming to the creative idea for connecting the circuit board end 1〇1—the first side line and the transmission cable end 1〇2 to the second side line surface circuit The 100 includes an isolation transformer 2, a common mode choke 3, a wave/yong suppressor 4, and a grounding network 5. The isolation transformer 2 includes a primary coil 21 and a secondary coil 23. The two connection ends 211, 213 of the primary coil 21 are connected to the circuit board terminal 1〇1' and the surge suppressor 4 is connected to the two connection terminals 21b, while the surge suppressor 4 is grounded. The secondary coil 23 has two connection ends 23 and 233 and a center tap 235. The common mode choke coil 3 includes a second coil 3 on the outer side, a second coil 3 on the outer side, and a second coil % in the middle, and the coils are wound on the same core. One side of the first coil 3 and the second coil 33 is connected to the two ends 23 of the dust collector secondary coil 23, and the other side of the second coil % is connected to the transmission line. One end of the third coil 35 is connected to one tap 235 of the secondary winding 23 of the transformer - the other end of the coil 35 is connected to the grounding network $. The grounding network 5 includes only one capacitor 51 connected to the ground, and the third coil % of the common mode choke coil 3 is connected in series with the capacitor 51 and grounded. The transmission line mirror end 102 generates a thirst due to lightning, electrostatic discharge, etc., correspondingly, a current 豸 current (four) will be generated on the common mode choke 3 directly connected to the transmission line end 102 and the secondary coil 23 of the transformer 2. The third line M351559 of the mode choke 3 is transmitted to the ground by the grounding network 5 and the grounding network 5. At the same time, the primary coil of the transformer 2 also senses a current surge which is suppressed by the surge suppressor 4 to avoid damage to the electronic components on the board side. In order to enhance the suppression of surge effects, the interface circuit (10) can also add a surge suppressor that is connected to the two outer coils of the common mode choke 3. 4 read the second picture 'the second picture is to apply the circuit diagram shown in Figure _ to the interface of the B-paper-T Ethernet interface 2, the interface circuit 2 (10) is connected to the circuit board end 101 and the transmission line end 1〇2, the interface circuit includes four pass-through channels, 205, 207. With the map! Compared with the interface circuit (10), the first coil 31 and the second coil of the common mode choke coil 3 of each of the transmission channels are added, and the second coil is magically connected to a wave suppressor 4, and the thirst suppressor 4 can enhance the effect of each channel to suppress the wave. The interface circuit adopts an integrated wave soup suppressor, and two connection ends 23 233 of the adjacent coils 21 of the adjacent two transmission channels 2〇1 and 203 are connected to the same-wave suppression suppressor 4, and the common mode choke 3 The first coil 31 and the second coil are connected to the same side and the wave suppressor 4 is grounded. The adjacent two transmission channels (10), the tearing and the transmission channels 201, 203 have the same structure. See the third to sixth figures together, showing the return loss of the interface circuit shown in Figure 2 when connected to 85 ohms, ohms and 115 ohms. No: The return loss is not for the transmission channel, where the line 5〇〇 is the standard value specified by the unit “B, the line 511 is the transmission channel 2〇1, the return loss when the ohm is 512 is the transmission channel 201 is connected to the ohm. The return loss curve of the time, the line is the return loss curve when the transmission 201 is connected to 115 ohms, ^, 512 and 513 are more than 5 均 on the line, and f ° is deleted by the U line. (4) ^ Lai can meet the return loss of the face Ma Qiantong 2, line M351559 531, 532 and 533 are the return loss curve of the transmission channel 203 when connected to 85 ohms, 100 ohms and 115 ohms, respectively, the curve average line more than 500, That is, the transmission path 203 satisfies the requirements of 1000 Base-T Ethernet. The fifth figure shows the return loss of the transmission channel 2〇5, and the lines 551, 552 and 553 are respectively connected to the transmission channel 205 by 85 ohms, 100 ohms and 115. The return loss curve of ohms, which is more than 5 均 on the line, that is, the transmission channel 205 satisfies the requirements of 1000 Base-T Ethernet. The sixth figure shows the return loss of the transmission channel 207, lines 571, 572 and 573 is the transmission channel 2〇7 connected to 85 ohms, 100 ohms and 115 The return loss curve of ohms, which is more than 500 on the average line, that is, the transmission channel 207 meets the requirements of 1000 Base-T Ethernet. The traditional network interface circuit with surge suppression function is at the transmission cable end 1〇2 The connected side uses a grounding network in which the resistor and the capacitor are connected in series and then grounded. In comparison, the third coil 35 of the common mode choke coil 3 of the above network interface circuits 100 and 200 is directly connected to a capacitor 51 and grounded. The network interface circuits 2〇〇, 3〇〇 are omitted.
電阻’從而可以消除在實際使用中電阻在通過高浪湧電流時發生爆 4之現象避免採用大容量電阻減小介面電路體積，同時該網路介 面電路2〇〇、300在省去電阻後，仍然滿足1000 Base-T網路的要求。 綜上所述，本創作確已符合新型專利之要件，爰依法提出專利 申月ί·隹Χ上所述者僅係本新型之較佳實施方式，本新型之範圍 並不以上述實施以爲限，舉凡熟習本案技藝之人士援依本新型之 精神斤作之等政修飾或變化，皆應涵蓋於以下中請專利範圍内。 【圖式簡單說明】 第圖係付合本創作之介面電路之電路圖； 弟--圖^系Μ__@ 路之電路圖； 、—圖所示網路介面電路應用於1000 Base-T乙太網 J0 M351559 第三圖係第第二圖所示電路圖之第一傳輸通道之回程損耗測 試圖， 第四圖係第第二圖所示電路圖之第二傳輸通道之回程損耗測 試圖； 弟五圖係弟弟二圖所不電路圖之第二傳輸通道之回程損耗測 試圖， 第六圖係第第二圖所示電路圖之第四傳輸通道之回程損耗測 試圖。 【主要元件符號說明】 網路介面電路 100 第一侧線路 101 第二侧線路 102 隔離變壓器 2 初級線圈 21 連接端 211 、213 次級線圈 23 連接端 231 ' 233 中間抽頭 235 共模扼流圈 3 第一線圈 31 第二線圈 33 第三線圈 35 浪湧抑制器 4 接地網路 5 電容 51 介面電路 200 淳輸通道 201 ' 203 '205 '207 標準回程損耗曲線 500 回程損耗曲線 511 > 513 · 、515 ' >517 回程損耗曲線 531 ' 533、535、537 回程損耗曲線 551、 553、 .555 ' 557 回程損耗曲線 571、 573、575、577The resistor 'can eliminate the phenomenon that the resistor explodes when passing high surge current in actual use. Avoid using a large-capacity resistor to reduce the interface circuit volume, and the network interface circuit 2〇〇, 300 after the resistor is omitted. Still meet the requirements of the 1000 Base-T network. In summary, this creation has indeed met the requirements of the new patent, and the patent application on the basis of the law is only the preferred embodiment of the present invention. The scope of the present invention is not limited to the above implementation. Anyone who is familiar with the skill of this case should be included in the following patents within the scope of the following patents. [Simple diagram of the diagram] The diagram is the circuit diagram of the interface circuit of the creation of this creation; the brother--the diagram of the system __@ road; the network interface circuit shown in the figure is applied to 1000 Base-T Ethernet J0 M351559 The third figure is the return loss test chart of the first transmission channel of the circuit diagram shown in the second figure, and the fourth picture is the return loss test chart of the second transmission channel of the circuit diagram shown in the second figure; The return loss loss test chart of the second transmission channel of the circuit diagram of the second figure is not shown. The sixth figure is the return loss test chart of the fourth transmission channel of the circuit diagram shown in the second figure. [Main component symbol description] Network interface circuit 100 First side line 101 Second side line 102 Isolation transformer 2 Primary coil 21 Connection end 211, 213 Secondary coil 23 Connection end 231 ' 233 Intermediate tap 235 Common mode choke 3 First coil 31 second coil 33 third coil 35 surge suppressor 4 grounding network 5 capacitor 51 interface circuit 200 transmission channel 201 ' 203 '205 '207 standard return loss curve 500 return loss curve 511 > 513 · , 515 ' > 517 Return Loss Curve 531 ' 533, 535, 537 Return Loss Curves 551, 553, .555 ' 557 Return Loss Curves 571, 573, 575, 577