201019657 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種傳送裝置及接收裝置，特別是關於一 種用於車載網路通訊系統之傳送裝置及接收裝置。； 【先前技術】 近幾年由於對汽車安全、可靠性與舒適需求的增加，汽 車電子的數量亦隨之增加，為使得不同的電子產品在車内 冑可相互溝通的平台，以進行資料傳輸，已有許多不同規 格的溝通網路平台存在於市場上。然而由於車用視聽設備 的加入，如行動數位電視接收機’全球定位導航系統與車 内個人影音娛樂等需求，大量的資料傳輸成為必要。以往 的車載網路之頻寬（如LIN，CAN等）已不敷使用，因此由 寶馬、博世、戴姆勒克萊斯勒、飛思卡爾，通用汽車、飛 利浦及大眾汽車等共同訂定之新一代車用網路通信協議， FlexRay，因而產生，此通信協議具有較高傳輸數率 • M bps以上）以及整合現有車載網路平台之特性。 在一應用於車載網路系統内之電壓差動傳輸系統，為克 服汽車環境内可能存在的電壓脈衝雜訊以及嚴苛的溫度環 境，尚壓的CMOS製程已被應用在設計此類的傳送接收電 路（參考先前技術文獻[1])，然而成本很高，且不易與其他 電路整合在單晶片系統。 參考圖1’其顯示習知用於車載網路通訊系統之傳送器 及接收器示意圖；參考圖2，其顯示用於車載網路通訊系 統之訊號示意圖。配合參考圖1及圖2,在車載網路通訊系 133585.doc 201019657 統之傳送裝置為達到安全及省電等考量，其傳送訊號除包 含邏輯咼態及邏輯低態之訊號，仍包含閒置及低功率閒置 訊號等至少四種狀態。當習知車載網路傳送器1〇1的輸入 訊號為低態時’會輸出一對電壓差動訊號BP〇與bm〇，而 且BPo<BMo ;反之’當輸入訊號為高態時，則 BPo>BMo。另外習知車載網路傳送器1〇1具有傳送間置訊 號以及低功率閒置訊號的功能，當傳送此類訊號時，差動 電壓訊號則偏壓在不同的準位且BP〇=bm〇。 電壓差動訊號ΒΡο與BMo經過傳輸線所造成的損耗與相 位延遲以及系統或其他原因所生成的雜訊耦合後，形成的 訊號BPi與BMi傳送到習知車載網路接收器ι〇2的兩端輸 入。當BPi<BMi時習知車載網路接收器1〇2的接收資料訊 波（Rdata)輸出為低態；反之，當BPi>BMi時接收資料訊號 (Rdata)輸出為高態。在此二種狀態下接收閒置訊號（Ridle) 均輸出低態。另外’當在接收到閒置訊號以及低功率閒置 信號時，即BPi=BMi，接收閒置訊號以及接收資料訊號均 輸出高態。 習知一般的電壓差動傳送電路（參考先前技術文獻[2])， 如美國專利第6847232號及本國專利第124232號，並無法 達成此傳輸之訊號。另外，有別於一般電壓差動信號之接 收電路（參考先前技術文獻[3])，如美國專利第7304494號 及美國專利第6768352號，除了接收一般邏輯高態及邏輯-低態之訊號外，仍需判別所傳輸的其他兩種狀態。另外， 習知的電壓差動傳接器中，接收電路之操作速率往往跟不 I33585.doc 201019657 上傳送器之速率，造成傳送瓶頸。 因此，有必要提供一種創新且具進步性的用於車載網路 通訊系統之傳送裝置及接收裝置，以解決上述問題。 先前技術文獻： [1 ] G. Caruso, "FlexRay Transceiver in a 0.35um CMOS High-Voltage Technology," in Proc. Design, Automation Test Europe (DATE), vol. 2, pp. 6-10 Mar. 2006.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmitting device and a receiving device, and more particularly to a transmitting device and a receiving device for an in-vehicle network communication system. [Prior Art] In recent years, as the demand for safety, reliability and comfort of automobiles has increased, the number of automotive electronics has also increased. In order to enable different electronic products to communicate with each other in the vehicle, data transmission is required. There are many communication network platforms of different specifications that exist in the market. However, due to the addition of automotive audio-visual equipment, such as mobile digital television receivers, global positioning navigation systems and in-car personal audio and video entertainment, a large amount of data transmission becomes necessary. The bandwidth of previous in-vehicle networks (such as LIN, CAN, etc.) is no longer sufficient, so a new generation of vehicles jointly developed by BMW, Bosch, DaimlerChrysler, Freescale, General Motors, Philips and Volkswagen The network communication protocol, FlexRay, results in a higher transmission rate (above M bps) and the integration of existing in-vehicle network platforms. In a voltage differential transmission system used in an in-vehicle network system, in order to overcome the possible voltage pulse noise and harsh temperature environment in the automotive environment, the still-pressed CMOS process has been applied to design such transmission and reception. The circuit (refer to the prior art document [1]), however, is costly and difficult to integrate with other circuits in a single wafer system. Referring to Figure 1', there is shown a schematic diagram of a conventional transmitter and receiver for an in-vehicle network communication system; and with reference to Figure 2, a schematic diagram of a signal for an in-vehicle network communication system is shown. With reference to Figure 1 and Figure 2, in the in-vehicle network communication system 133585.doc 201019657, the transmission device for safety and power saving considerations, in addition to the logic state and logic low signal, the transmission signal still contains idle and At least four states, such as low power idle signals. When the input signal of the vehicle network transmitter 1〇1 is low, 'a pair of voltage differential signals BP〇 and bm〇 will be output, and BPo<BMo; otherwise, when the input signal is high, BPo>; BMo. In addition, the conventional in-vehicle network transmitter 1〇1 has the function of transmitting the inter-set signal and the low-power idle signal. When transmitting such a signal, the differential voltage signal is biased at different levels and BP〇=bm〇. The voltage differential signal ΒΡο and BMo are coupled to the noise generated by the transmission line and the phase delay and the noise generated by the system or other reasons, and the formed signals BPi and BMi are transmitted to the two ends of the conventional vehicle network receiver ι〇2. Input. When BPi<BMi, the received data signal (Rdata) output of the in-vehicle network receiver 1〇2 is low; otherwise, the received data signal (Rdata) output is high when BPi>BMi. In these two states, the received idle signal (Ridle) outputs a low state. In addition, when the idle signal and the low power idle signal are received, that is, BPi=BMi, the received idle signal and the received data signal are both output high. A conventional voltage differential transmission circuit (refer to the prior art document [2]), such as U.S. Patent No. 6,847,232 and National Patent No. 124232, cannot achieve this transmission signal. In addition, a receiving circuit that is different from a general voltage differential signal (refer to the prior art document [3]), such as U.S. Patent No. 7,304,494 and U.S. Patent No. 6,676,352, except for receiving a general logic high state and a logic-low state signal. It is still necessary to discriminate the other two states transmitted. In addition, in conventional voltage differential transmitters, the operating rate of the receiving circuit often does not follow the rate of the transmitter on I33585.doc 201019657, causing a transmission bottleneck. Therefore, it is necessary to provide an innovative and progressive transmission device and receiving device for an in-vehicle network communication system to solve the above problems. Prior Technical Literature: [1] G. Caruso, "FlexRay Transceiver in a 0.35um CMOS High-Voltage Technology," in Proc. Design, Automation Test Europe (DATE), vol. 2, pp. 6-10 Mar. 2006.
[2] C.-C. Wang and J.-M. Huang, "1.0 Gbps LVDS transceiver design using a common mode DC biasing," FLS7Z>asigw/C4D 5>τη/λ， B3-1, pp. 14, CD-ROM version, Aug. 2004.[2] C.-C. Wang and J.-M. Huang, "1.0 Gbps LVDS transceiver design using a common mode DC biasing,"FLS7Z>asigw/C4D5>τη/λ, B3-1, pp. 14, CD-ROM version, Aug. 2004.
[3] H.-C. Chow, and W.-W. Sheen, "Low power LVDS circuit for serial data communications," Int. Symp. Intelligent Signal Processing Communication Syst. (ISPACS), pp. 293-296, Dec. 2005. 【發明内容】 本發明提供一種用於車載網路通訊系統之傳送裝置，包 括：一電壓穩壓器、一訊號轉換器及一差動電壓驅動器。 該電壓穩壓器用以提供至少一輸出電壓。該訊號轉換器用 以接收至少一資料訊號及至少一閒置訊號，轉換為複數個 控制訊號。該差動電壓驅動器用以依據該等控制訊號，輸 出電壓差動訊號。 本發明另提供一種用於車載網路通訊系統之接收裝置， 包括：一電壓穩壓器、一比較器陣列及一比較訊號解碼 器。該電壓穩壓器用以提供至少一輸出電壓。該比較器陣 列具有複數個比較器，用以接收電壓差動訊號，輸出複數 個比較訊號。該比較訊號解碼器用以接收該等比較訊號， 133585.doc 201019657 解碼成至少一資料訊號及至少一閒置訊號。 本發明用於車載網路通訊系統之傳送裝置可傳送四種狀 態訊號；且本發明用於車載網路通訊系統之接收裝置可接 收四種狀態訊號’判定所接收訊號之邏輯及狀態。本發明 係使用典型CMOS製程，可有效降低晶片製作成本以及具 有易於系統整合之特性，並可改善電壓差動訊號接收器的 操作速度。 【實施方式】 參 參考圖3，其顯示本發明用於車載網路通訊系統之傳送 裝置之示意圖。本發明之用於車載網路通訊系統之傳送裝 置3 00包括：一電壓穩壓器3〇1、一訊號轉換器3 〇2及一差 動電壓驅動器303。該電壓穩壓器301用以提供至少一輸出 電壓。在本實施例中’該電壓穩壓器3〇丨提供一第一輸出 電壓VDC 1至該訊號轉換器3〇2;及一第二輸出電壓VDC2 至該差動電壓驅動器303。電壓穩壓器301輸出之該第一輸 ❹ 出電壓及該第二輸出電壓係為在一定範圍内不隨溫度與系 統電壓變動而飄移之穩定電壓，可分別作為差動電壓驅動 器303的共模偏壓及工作電壓。 參考圖4,其顯示本發明之電壓穩壓器之示意圖。本發 明之該電壓穩壓器3〇1包括一起始電路311、—帶差參考電 路312、一運算放大器3 13、一輸出電晶體314及一串聯電 阻組315' 316。該起始電路311用以接收一輸入電壓，並 啟動該帶差參考電路312 ;該帶差參考電路312用以產生一 參考電壓；參考電壓輸入至該前述運算放大器3丨3，該運 133585.doc 201019657 算放大器313輸出一輸出訊號至該輸出電晶體314,該串聯 電阻組315、316連接至該輸出電晶體314，用以分壓提供 一迴授訊號至該運算放大器313，以穩定該輸出電壓Vo。 再參考圖3,該訊號轉換器302用以接收至少一資料訊號 及至少一閒置訊號，轉換為複數個控制訊號。在本實施例 中，該訊號轉換器用以依據一高態資料訊號（Datal_C)、 一低態資料訊號（DataO_C)、一閒置訊號（Idle_C)、一低功 率閒置訊號（Idle_LP—C)及該第一輸出電壓VDC1，轉換為 四個控制訊號（TX_IN1、TX_IN2、TX jN3、TX_IN4)及一 共模偏壓準位VCM。 該訊號轉換器302包括複數個邏輯電路及一切換開關 SW，該等邏輯電路用以將該高態資料訊號、該低態資料 訊號、該閒置訊號及該低功率閒置訊號解碼轉換成四個控 制訊號（TX_IN1、TX_IN2、TX_IN3、TX—IN4)，該切換開 關SW用以依據該低功率閒置訊號Idle_LP_C切換控制該第 一輸出電壓VDC1或一接地電壓為該共模偏壓準位VCM。 該差動電壓驅動器303用以依據該等控制訊號，輸出電 壓差動訊號。在本實施例中，該差動電壓驅動器303用以 依據上述四個控制訊號（TX_IN1、TX_IN2、TX_IN3、 TX_IN4)，輸出一對電壓差動訊號（ΒΡο及BMo)。該差動電 壓驅動器303包含一電流源電路M305、一電流切換開關電 路、一電流槽電路M3 06及二個共模分壓電阻RA、RB»該 電流源電路M305連接該第二輸出電壓VDC2，該電流源電 路M305連接該電流切換開關電路，該電流源電路M305係 133585.doc -10- 201019657 為在電流偏壓（Current_biasl)下之電晶體M305。 該電流切換開關電路包含四個電晶體開關M301、 M302、M303及M304，由該等四個控制訊號（TX_IN1、 TX—IN2、TX—IN3、TX—IN4)分別控制四個電晶體開關， 二個共模分壓電阻RA、RB連接於該等電晶體開關之間， 二個共模分壓電阻RA、RB間連接至該共模偏壓準位 VCM。該電流槽電路M306連接該電流切換開關電路，該 電流槽電路1^13 06係為在電流偏壓（(：11〇^1^_1^332)下之電晶 體M306。電壓差動訊號（ΒΡο及BMo)連接於該等電晶體開 關之間。 本發明用於車載網路通訊系統之傳送裝置300其操作動 作如下： (1) .當電路傳送高態訊號時，輸入端之訊號僅高態資料 訊號Datal_C為高態，其餘均為低態，此時TX_IN2與 TX_IN4為高態且TX—IN1與TX_IN3為低態，電晶趙開關 M301 與 M304導通（turn on)，M302與 M303 關閉（turn off)， 驅動電流經由M305流經M301、RA、RB、M304至M306 ’ 使得輸出端ΒΡο之電壓大於輸出端BMo之電壓。 (2) .當電路傳送低態訊號時，輸入端之訊號僅低態資料 訊號DataO_C為高態，其餘均為低態，此時TX_IN2與 TX_IN4為低態且TX_IN1與TX_IN3為高態，電晶體開關 M301 與 M304 關閉（turn off)，M302 與 M303 導通（turn on) ’ 驅動電流經由M305流經M302、RB、RA、M303至M306， 輸出端ΒΡο之電壓小於輸出端BMo之電壓。 133585.doc 201019657 (3) .當電路傳送閒置訊號時，輸入端之訊號僅閒置訊號 Idle_C為高態，其餘均為低態，此時TX_IN1與TX_IN2為 高態且TX_IN3與TX_IN4為低態，電晶體開關M301、 M302、M303與M304均關閉（turn off)，沒有驅動電流之路 徑，輸出端ΒΡο之電壓等於輸出端BMo之電壓且偏壓在經 訊號轉換器302内開關（SW)所選擇之第一輸出電壓VDC1。 (4) .當電路傳送低功率閒置訊號時，輸入端之訊號僅低 功率閒置訊號Idle_LP_C為高態，其餘均為低態，此時 TX_IN1與TX_IN2為高態且TX_IN3與TX_IN4為低態，電 晶體開關 M301、M302、M303與 M304均關閉（turn off)，沒 有驅動電流之路徑，輸出端ΒΡο之電壓等於輸出端BMo之 電壓且偏壓在經訊號轉換器内開關（SW)所選擇之接地電 壓。 因此，本發明用於車載網路通訊系統之傳送裝置300可 以傳送如圖2之四種狀態訊號。 參考圖5，其顯示本發明用於車載網路通訊系統之接收 裝置之示意圖。本發明用於車載網路通訊系統之接收裝置 400包括：一電壓穩壓器401、一比較器陣列402及一比較 訊號解碼器403。該電壓穩壓器401用以提供至少一輸出電 壓。在本實施例中，該電壓穩壓器401提供一第三輸出電 壓VDC3至該比較器陣列402及該比較訊號解碼器403。電 壓穩壓器401輸出之該第三輸出電壓VDC3係為在一定範圍 内不隨溫度與系統電壓變動而飄移之穩定電壓，可作為該 比較器陣列402及該比較訊號解碼器403的工作電壓。該電 133585.doc •12- 201019657 壓穩壓器401可參考上述圖4之該電壓穩壓器301，在此不 加資述。 在本實施例中，輸入之電壓差動訊號包括一第一電壓差 動訊號BPi及一第二電壓差動訊號BMi，二共模偏壓電阻 RC、RD連接於該第一電壓差動訊號BPi及該第二電壓差動 訊號BMi之間，以提供一共模偏壓輸入訊號RVCM。 該比較器陣列402具有複數個比較器，用以接收電壓差 動訊號，輸出複數個比較訊號。在本實施例中，該比較器 陣列402包含一第一比較器501、一第二比較器502及一第 三比較器503 ;其中該第一比較器501以第一電壓差動訊號 BPi為其正端（VP)輸入及以第二電壓差動訊號BMi為其負端 (VN)輸入，並輸出一第一比較訊號compl ;該第二比較器 502以第二電壓差動訊號BMi為其正端輸入及以共模偏壓 輸入訊號RVCM為其負端輸入，並輸出一第二比較訊號 comp2 ;該第三比較器503以第一電壓差動訊號BPi為其正 端輸入及以共模偏壓輸入訊號RV CM為其負端輸入，並輸 出一第三比較訊號comp3。 參考圖6，其顯示本發明之比較器之示意圖。本發明之 上述比較器（以第一實施例501為例說明）包括一預先放大器 601、一判斷電路602及一比較緩衝器603。其中輸入之電 壓差動訊號經該預先放大器601放大後，經判斷電路602比 較後由比較緩衝器603增加訊號的擺幅至接近邏輯準位。 再參考圖5,該比較訊號解碼器403用以接收該等比較訊 號，解碼成至少一資料訊號Rdata及至少一閒置訊號 133585.doc •13· 201019657[3] H.-C. Chow, and W.-W. Sheen, "Low power LVDS circuit for serial data communications," Int. Symp. Intelligent Signal Processing Communication Syst. (ISPACS), pp. 293-296 The invention provides a transmission device for an in-vehicle network communication system, comprising: a voltage regulator, a signal converter and a differential voltage driver. The voltage regulator is configured to provide at least one output voltage. The signal converter is configured to receive at least one data signal and at least one idle signal to convert into a plurality of control signals. The differential voltage driver is configured to output a voltage differential signal according to the control signals. The invention further provides a receiving device for an in-vehicle network communication system, comprising: a voltage regulator, a comparator array and a comparison signal decoder. The voltage regulator is configured to provide at least one output voltage. The comparator array has a plurality of comparators for receiving voltage differential signals and outputting a plurality of comparison signals. The comparison signal decoder is configured to receive the comparison signals, and the 133585.doc 201019657 is decoded into at least one data signal and at least one idle signal. The transmitting device for the in-vehicle network communication system of the present invention can transmit four kinds of status signals; and the receiving device for the in-vehicle network communication system of the present invention can receive four state signals to determine the logic and state of the received signal. The present invention uses a typical CMOS process to reduce wafer fabrication costs and features ease of system integration and to improve the operating speed of the voltage differential signal receiver. [Embodiment] Referring to Fig. 3, there is shown a schematic diagram of a transmitting apparatus for an in-vehicle network communication system of the present invention. The transmitting device 300 for the in-vehicle network communication system of the present invention comprises: a voltage regulator 3?1, a signal converter 3?2 and a differential voltage driver 303. The voltage regulator 301 is configured to provide at least one output voltage. In the present embodiment, the voltage regulator 3 〇丨 provides a first output voltage VDC 1 to the signal converter 3〇2; and a second output voltage VDC2 to the differential voltage driver 303. The first output voltage and the second output voltage output by the voltage regulator 301 are stable voltages that do not drift with temperature and system voltage within a certain range, and can be used as a common mode of the differential voltage driver 303, respectively. Bias and operating voltage. Referring to Figure 4, there is shown a schematic diagram of a voltage regulator of the present invention. The voltage regulator 3.1 of the present invention includes a start circuit 311, a difference reference circuit 312, an operational amplifier 313, an output transistor 314, and a series resistor group 315'316. The start circuit 311 is configured to receive an input voltage and activate the difference reference circuit 312; the difference reference circuit 312 is configured to generate a reference voltage; and the reference voltage is input to the operational amplifier 3丨3, which is 133585. Doc 201019657 The amplifier 313 outputs an output signal to the output transistor 314. The series resistor group 315, 316 is connected to the output transistor 314 for providing a feedback signal to the operational amplifier 313 to stabilize the output. Voltage Vo. Referring to FIG. 3, the signal converter 302 is configured to receive at least one data signal and at least one idle signal, and convert the signal into a plurality of control signals. In this embodiment, the signal converter is configured to use a high-level data signal (Datal_C), a low-level data signal (DataO_C), an idle signal (Idle_C), a low-power idle signal (Idle_LP-C), and the first An output voltage VDC1 is converted into four control signals (TX_IN1, TX_IN2, TX jN3, TX_IN4) and a common mode bias level VCM. The signal converter 302 includes a plurality of logic circuits and a switch SW for converting the high-level data signal, the low-level data signal, the idle signal, and the low-power idle signal into four controls. The switch (TX_IN1, TX_IN2, TX_IN3, TX_IN4) is configured to switch the first output voltage VDC1 or a ground voltage to the common mode bias level VCM according to the low power idle signal Idle_LP_C. The differential voltage driver 303 is configured to output a voltage differential signal according to the control signals. In this embodiment, the differential voltage driver 303 is configured to output a pair of voltage differential signals (ΒΡο and BMo) according to the four control signals (TX_IN1, TX_IN2, TX_IN3, TX_IN4). The differential voltage driver 303 includes a current source circuit M305, a current switching circuit, a current tank circuit M3 06, and two common mode voltage dividing resistors RA, RB». The current source circuit M305 is connected to the second output voltage VDC2. The current source circuit M305 is connected to the current switching circuit. The current source circuit M305 is 133585.doc -10- 201019657 is a transistor M305 under current bias (Current_biasl). The current switch circuit comprises four transistor switches M301, M302, M303 and M304, and the four transistor signals (TX_IN1, TX_IN2, TX_IN3, TX_IN4) respectively control four transistor switches, two The common mode voltage dividing resistors RA and RB are connected between the transistor switches, and the two common mode voltage dividing resistors RA and RB are connected to the common mode biasing level VCM. The current slot circuit M306 is connected to the current switch circuit, and the current slot circuit 1^13 06 is a transistor M306 under current bias ((: 11〇^1^_1^332). Voltage differential signal (ΒΡο And BMo) is connected between the transistor switches. The transmitting device 300 for the in-vehicle network communication system of the present invention operates as follows: (1) When the circuit transmits a high-state signal, the signal at the input end is only high. The data signal Datal_C is high and the rest are low. At this time, TX_IN2 and TX_IN4 are high and TX_IN1 and TX_IN3 are low. The electro-optical switches M301 and M304 are turned on, and M302 and M303 are turned off. Off), the driving current flows through M305 through M301, RA, RB, M304 to M306' so that the voltage at the output terminal ΒΡο is greater than the voltage at the output terminal BMo. (2) When the circuit transmits a low state signal, the signal at the input terminal is only low. The state data signal DataO_C is high and the rest are low. At this time, TX_IN2 and TX_IN4 are low and TX_IN1 and TX_IN3 are high. The transistor switches M301 and M304 are turned off, and M302 and M303 are turned on. 'Drive current flows through M302 through M302, RB RA, M303 to M306, the voltage at the output terminal ΒΡο is less than the voltage at the output terminal BMo. 133585.doc 201019657 (3) When the circuit transmits the idle signal, the signal at the input end is only the idle signal Idle_C is high, and the rest are low. At this time, TX_IN1 and TX_IN2 are in a high state and TX_IN3 and TX_IN4 are in a low state, and the transistor switches M301, M302, M303 and M304 are turned off, there is no path of driving current, and the voltage of the output terminal ΒΡο is equal to the output terminal BMo. The voltage and the bias voltage are at the first output voltage VDC1 selected by the switch (SW) in the signal converter 302. (4) When the circuit transmits the low power idle signal, the signal at the input end is only the low power idle signal Idle_LP_C is high. The rest are in a low state. At this time, TX_IN1 and TX_IN2 are in a high state and TX_IN3 and TX_IN4 are in a low state, and the transistor switches M301, M302, M303, and M304 are all turned off, there is no path for driving current, and the output terminal is ΒΡο The voltage is equal to the voltage of the output terminal BMo and the bias voltage is the ground voltage selected by the switch (SW) in the signal converter. Therefore, the transmitting device 300 for the in-vehicle network communication system of the present invention can transmit FIG 2 the four states signal. Referring to Figure 5, which shows a schematic diagram of the receiving device of the in-vehicle network communication system of the present invention. The receiving device 400 for the in-vehicle network communication system of the present invention comprises: a voltage regulator 401, a comparator array 402 and a comparison signal decoder 403. The voltage regulator 401 is configured to provide at least one output voltage. In this embodiment, the voltage regulator 401 provides a third output voltage VDC3 to the comparator array 402 and the comparison signal decoder 403. The third output voltage VDC3 outputted by the voltage regulator 401 is a stable voltage that does not drift with temperature and system voltage fluctuation within a certain range, and can be used as an operating voltage of the comparator array 402 and the comparison signal decoder 403. The voltage regulator 401 can refer to the voltage regulator 301 of FIG. 4 above, and is not described herein. In this embodiment, the input voltage differential signal includes a first voltage differential signal BPi and a second voltage differential signal BMi, and the common mode bias resistors RC and RD are connected to the first voltage differential signal BPi. And between the second voltage differential signal BMi to provide a common mode bias input signal RVCM. The comparator array 402 has a plurality of comparators for receiving voltage differential signals and outputting a plurality of comparison signals. In this embodiment, the comparator array 402 includes a first comparator 501, a second comparator 502, and a third comparator 503. The first comparator 501 has a first voltage differential signal BPi. The positive terminal (VP) input and the second voltage differential signal BMi are input to its negative terminal (VN), and output a first comparison signal compl; the second comparator 502 is positive with the second voltage differential signal BMi The terminal input and the common mode bias input signal RVCM are input to the negative terminal thereof, and output a second comparison signal comp2; the third comparator 503 uses the first voltage differential signal BPi as its positive terminal input and the common mode bias The voltage input signal RV CM is input to its negative terminal and outputs a third comparison signal comp3. Referring to Figure 6, there is shown a schematic diagram of a comparator of the present invention. The above comparator (illustrated by the first embodiment 501) includes a preamplifier 601, a judging circuit 602 and a comparison buffer 603. The input voltage differential signal is amplified by the preamplifier 601, and after the comparison circuit 602 is compared, the comparison buffer 603 increases the swing of the signal to a logic level. Referring to FIG. 5, the comparison signal decoder 403 is configured to receive the comparison signals and decode the data into at least one data signal Rdata and at least one idle signal. 133585.doc •13· 201019657
Ridle。在本實施例中，該比較訊號解碼器403包括一或閘 504、一反互斥或閘505及一濾波電容M501，其中該反互 斥或閘505用以接收該第二比較訊號comp2及該第三比較訊 號comp3，並輸出該閒置訊號Ridle。該或閘504用以接收 該第一比較訊號compl及該閒置訊號Ridle，並輸出該資料 訊號Rdata。該濾波電容M501連接至該反互斥或閘505之輸 出，用以消除數位訊號間之切換雜訊。在本實施例中，該 遽波電容係為一源集極相連（S-D connected)之電晶體 w M501。 本發明用於車載網路通訊系統之接收裝置400另包括複 數個輸出緩衝器，分別連接至該資料訊號及該閒置訊號， 其中一第一輸出緩衝器404連接至該資料訊號Rdata，一第 二輸出緩衝器405連接至該閒置訊號Ridle，每一輸出緩衝 器包含至少一反相器，並串接以增加驅動負載能力。 本發明用於車載網路通訊系統之接收裝置400其操作動 ^ 作如下： (1) .當接收高態訊號時，此時第一電壓差動訊號BPi之電 壓大於第二電壓差動訊號BMi之電壓；第二電壓差動訊號 BMi之電壓小於共模偏壓輸入訊號RVCM;第一電壓差動 訊號BPi之電壓大於共模偏壓輸入訊號RVCM。該比較器陣 列402之第一比較訊號compl為高態；第二比較訊號comp2 為低態；第三比較訊號comp3為高態。該比較訊號解碼器 403之資料訊號Rdata為高態，閒置訊號Ridle為低態。 (2) .當接收低態訊號時，此時第一電壓差動訊號BPi之電 133585.doc 14- 201019657 壓小於第二電壓差動訊號BMi之電壓；第二電壓差動訊號 BMi之電壓大於共模偏壓輸入訊號RVCM;第一電壓差動 訊號BPi之電壓小於共模偏壓輸入訊號RVCM，比較器陣列 402之第一比較訊號compl為低態；第二比較訊號comp2為 高態；第三比較訊號comp3為低態。該比較訊號解碼器403 之資料訊號Rdata為低態，閒置訊號Ridle為低態。 (3) .當接收閒置訊號時，此時第一電壓差動訊號BPi之電 壓等於第二電壓差動訊號BMi之電壓；第二電壓差動訊號 BMi之電壓等於共模偏壓輸入訊號RVCM;第一電壓差動 訊號BPi之電壓等於共模偏壓輸入訊號RVCM。此時，共模 偏壓輸入訊號RVCM可為如圖3之第一輸出電壓VDC1 (該共 模偏壓準位VCM)。比較器陣列之第一比較訊號compl為低 態；第二比較訊號comp2為低態；第三比較訊號comp3為 低態。該比較訊號解碼器403之閒置訊號Ridle為高態。 (4) .當接收低功率閒置訊號時，此時第一電壓差動訊號 BPi之電壓等於第二電壓差動訊號BMi之電壓；第二電壓 差動訊號BMi之電壓等於共模偏壓輸入訊號RVCM;第一 電壓差動訊號BPi之電壓等於共模偏壓輸入訊號RVCM。此 時，共模偏壓輸入訊號RVCM可為如圖3之接地電壓。比較 器陣列402之第一比較訊號compl為低態；第二比較訊號 comp2為低態；第三比較訊號comp3為低態。該比較訊號 解碼器403之間置訊號Ridle為高態。 為顯示本發明之優越性，本發明之較佳實施例以台灣積 體電路公司提供之0.18 um 1P6M CMOS製程來實作之。圖 133585.doc •15· 201019657 7為本發明用於車葡細 平戰網路通訊系統之傳送裝置及接收裝置 之實體晶片量測圖，其|泡丨& ΛRidle. In the present embodiment, the comparison signal decoder 403 includes an OR gate 504, an anti-mutation or gate 505, and a filter capacitor M501, wherein the anti-mutation gate 505 is configured to receive the second comparison signal comp2 and the The third comparison signal comp3 outputs the idle signal Riddle. The OR gate 504 is configured to receive the first comparison signal compl and the idle signal Ridle, and output the data signal Rdata. The filter capacitor M501 is coupled to the output of the anti-mutation or gate 505 for canceling switching noise between digital signals. In this embodiment, the chopper capacitor is a S-D connected transistor w M501. The receiving device 400 for the in-vehicle network communication system of the present invention further includes a plurality of output buffers respectively connected to the data signal and the idle signal, wherein a first output buffer 404 is connected to the data signal Rdata, a second An output buffer 405 is coupled to the idle signal Ridle, each output buffer including at least one inverter coupled in series to increase drive load capability. The receiving device 400 for the in-vehicle network communication system of the present invention operates as follows: (1) When receiving the high-state signal, the voltage of the first voltage differential signal BPi is greater than the second voltage differential signal BMi. The voltage of the second voltage differential signal BMi is smaller than the common mode bias input signal RVCM; the voltage of the first voltage differential signal BPi is greater than the common mode bias input signal RVCM. The first comparison signal comp1 of the comparator array 402 is in a high state; the second comparison signal comp2 is in a low state; and the third comparison signal comp3 is in a high state. The data signal Rdata of the comparison signal decoder 403 is high, and the idle signal Ridle is low. (2) When receiving the low state signal, the voltage of the first voltage differential signal BPi is 133585.doc 14- 201019657, and the voltage is lower than the voltage of the second voltage differential signal BMi; the voltage of the second voltage differential signal BMi is greater than The common mode bias input signal RVCM; the voltage of the first voltage differential signal BPi is less than the common mode bias input signal RVCM, the first comparison signal compl of the comparator array 402 is low; the second comparison signal comp2 is high; The three comparison signals comp3 are in a low state. The data signal Rdata of the comparison signal decoder 403 is in a low state, and the idle signal Ridle is in a low state. (3) When receiving the idle signal, the voltage of the first voltage differential signal BPi is equal to the voltage of the second voltage differential signal BMi; the voltage of the second voltage differential signal BMi is equal to the common mode bias input signal RVCM; The voltage of the first voltage differential signal BPi is equal to the common mode bias input signal RVCM. At this time, the common mode bias input signal RVCM can be the first output voltage VDC1 (the common mode bias level VCM) as shown in FIG. The first comparison signal compl of the comparator array is low; the second comparison signal comp2 is low; and the third comparison signal comp3 is low. The idle signal Ridle of the comparison signal decoder 403 is high. (4) When receiving the low power idle signal, the voltage of the first voltage differential signal BPi is equal to the voltage of the second voltage differential signal BMi; the voltage of the second voltage differential signal BMi is equal to the common mode bias input signal. RVCM; the voltage of the first voltage differential signal BPi is equal to the common mode bias input signal RVCM. At this time, the common mode bias input signal RVCM can be the ground voltage as shown in FIG. The first comparison signal comp1 of the comparator array 402 is in a low state; the second comparison signal comp2 is in a low state; and the third comparison signal comp3 is in a low state. The signal signal Ridge between the comparison signal decoder 403 is high. In order to demonstrate the advantages of the present invention, a preferred embodiment of the present invention is implemented in a 0.18 um 1P6M CMOS process provided by Taiwan Integrated Circuits Corporation. Figure 133585.doc •15· 201019657 7 is a physical wafer measurement diagram of a transmitting device and a receiving device for a mobile communication network communication system of the present invention, which |bubble&
具1測負載為40歐姆之電阻與100 pF 之電谷並聯。圖8為本發明之㈣，在工作電壓為 3.3¥時最高可傳輸之速率為417奶^。 *本發明用於車載網路通訊系統之傳送裝置可傳送四種狀 訊號’且本發明用於車载網路通訊系統之接收裝置可接 收四種狀態訊號，判定所技 J疋所接收訊唬之邏輯及狀態。本發明 係使用典型CMOS製葙，可士 1 * 聚程可有效降低晶片製作成本以及具 有易於系統整合之特姓，廿 特陡並可改善電壓差動訊號接收器的 操作速度。 之原理及其功效，而非限 人士對上述實施例進行修 本發明之權利範圍應如後 惟上述實施例僅為說明本發明 制本發明。因此，習於此技術之 改及變化仍不脫本發明之精神。 述之申請專利範圍所列。 【圖式簡單說明】A resistor with a load of 40 ohms is connected in parallel with a valley of 100 pF. Figure 8 is a (4) of the present invention, and the maximum transfer rate is 417 milk at a working voltage of 3.3 ¥. * The transmitting device for the in-vehicle network communication system of the present invention can transmit four kinds of signals' and the receiving device for the in-vehicle network communication system of the present invention can receive four kinds of status signals, and determine the received signal of the technology. The logic and state. The present invention uses a typical CMOS system, which can effectively reduce the cost of wafer fabrication and the unique system name that is easy to integrate, and can improve the operating speed of the voltage differential signal receiver. The invention is not limited to the above-described embodiments. The scope of the invention should be construed as the following description of the invention. Therefore, variations and modifications of the technology may be made without departing from the spirit of the invention. The scope of the patent application is listed. [Simple description of the map]
圖1顯示習知用於車載網路通訊系 示意圖； 統之傳送器及接收器 圖2顯示用於車載網路通訊系統之訊號示意圖； 圖3顯示本發明用於車载網路通訊系統之傳 意圖； 圖4顯示本發明之電壓穩壓器之示意圖； 統之接收裝置之示 圖5顯示本發明用於車載網路通訊系 意圖； 圖6顯示本發明之比較器之示意圖； 133585.doc 201019657 圖7為本發明用於車載網路通訊系統之傳送裝置及接收 裝置之實體晶片量測圖；及 圖8為本發明之shmoo Plot示意圖。 【主要元件符號說明】1 shows a schematic diagram of a conventional communication system for an in-vehicle network; a transmitter and a receiver of the system; FIG. 2 shows a schematic diagram of a signal for an in-vehicle network communication system; FIG. 3 shows a transmission of the invention for an in-vehicle network communication system. Figure 4 shows a schematic diagram of a voltage regulator of the present invention; Figure 5 of the receiving device shows the intention of the present invention for in-vehicle network communication; Figure 6 shows a schematic diagram of the comparator of the present invention; 133585.doc 201019657 7 is a physical wafer measurement diagram of a transmitting device and a receiving device for an in-vehicle network communication system of the present invention; and FIG. 8 is a schematic diagram of a shmoo Plot of the present invention. [Main component symbol description]
101 習知車載網路傳送器 102 習知車載網路接收器 300 本發明用於車載網路通訊系統之傳送裝置 301 電壓穩壓器 302 訊號轉換器 303 差動電壓驅動器 311 起始電路 312 帶差參考電路 313 運算放大器 314 輸出電晶體 315 、 316 串聯電阻組 400 本發明用於車載網路通訊系統之接收裝置 401 電壓穩壓器 402 比較器陣列 403 比較訊號解碼器 404 第一輸出緩衝器 405 第二輸出緩衝器 501 第一比較器 502 第二比較器 503 第三比較器 133585.doc •17· 201019657 504 或閘 505 反互斥或閘 601 預先放大器 602 判斷電路 603 比較緩衝器 M301-M304 電流切換開關電路 M305 電流源電路 M306 電流槽電路 M501 源-集極相連之電晶體 RA、RB 共模分壓電阻 RC、RD 共模偏壓電阻 SW 切換開關101 Conventional Vehicle Network Transmitter 102 Conventional Vehicle Network Receiver 300 The present invention is used for the transmission device 301 of the vehicle network communication system. Voltage regulator 302 Signal converter 303 Differential voltage driver 311 Starting circuit 312 Band difference Reference Circuit 313 Operational Amplifier 314 Output Transistor 315, 316 Series Resistor Group 400 Receiver 401 for In-Vehicle Network Communication System Voltage Regulator 402 Comparator Array 403 Comparison Signal Decoder 404 First Output Buffer 405 Two output buffer 501 first comparator 502 second comparator 503 third comparator 133585.doc • 17· 201019657 504 or gate 505 reverse mutex or gate 601 preamplifier 602 judgment circuit 603 compare buffer M301-M304 current switching Switch circuit M305 Current source circuit M306 Current slot circuit M501 Source-collector connected transistor RA, RB Common mode voltage dividing resistor RC, RD Common mode bias resistor SW Switch
133585.doc -18 -133585.doc -18 -