TWI488466B - Portable device - Google Patents
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本發明為一種手持式電子裝置，特別是一種具有阻抗轉換電路的手持式電子裝置。The invention is a handheld electronic device, in particular a handheld electronic device with an impedance conversion circuit.
隨著消費者使用行動裝置的比例快速增加，使用智慧型手機或平板電腦隨時處理工作事務、娛樂視聽及滿足上網需求已是消費主流趨勢。一般來說，行動裝置包含了至少一個顯示裝置(如液晶螢幕)、一主機板以及多種不同的無線信號通信裝置，如3G通信模組、WiFi無線通信模組或是藍芽通信模組。而目前顯示裝置與主機板係採用高速的低壓差分信號(LVDS、Low Voltage Differential Signal)傳輸，容易產生高頻雜訊，對於智慧型手機內的3G通信模組、WiFi無線通信模組或是藍芽通信模組可能會產生干擾，無法達成通訊效能中的總全向靈敏度(TIS)的規範。對於上述問題，目前一般的解決方案是利用人工在行動裝置內部貼銅箔或是導電泡棉來阻擋雜訊，不但需要繁複步驟，且耗費時間及人力。With the rapid increase in the proportion of consumers using mobile devices, it is a mainstream consumer trend to use smart phones or tablets to handle work transactions, entertainment, and meet the needs of the Internet. Generally, the mobile device includes at least one display device (such as a liquid crystal screen), a motherboard, and a plurality of different wireless signal communication devices, such as a 3G communication module, a WiFi wireless communication module, or a Bluetooth communication module. At present, the display device and the motherboard are transmitted by high-speed low-voltage differential signals (LVDS, Low Voltage Differential Signal), which is easy to generate high-frequency noise, and is a 3G communication module, a WiFi wireless communication module or a blue in a smart phone. The bud communication module may cause interference and fail to achieve the specification of total omnidirectional sensitivity (TIS) in communication performance. For the above problems, the current general solution is to manually block the copper foil or the conductive foam inside the mobile device to block the noise, which requires complicated steps and time and labor.
本發明的一實施例提供一種手持式電子裝置。該手持式電子裝置包括一低壓差分信號產生器、一阻抗轉換電路以及一液晶顯示裝置。該低壓差分信號產生器，接收並轉換一影像信號為一第一信號。該阻抗轉換電路，耦接該低 壓差分信號產生器，接收該第一信號並輸出一第二信號，其中阻抗轉換電路調整該第二信號的一特性阻抗為一預定值。液晶顯示裝置透過一軟排線接收該第二信號，並顯示一對應影像。An embodiment of the invention provides a handheld electronic device. The handheld electronic device includes a low voltage differential signal generator, an impedance conversion circuit, and a liquid crystal display device. The low voltage differential signal generator receives and converts an image signal into a first signal. The impedance conversion circuit is coupled to the low The differential signal generator receives the first signal and outputs a second signal, wherein the impedance conversion circuit adjusts a characteristic impedance of the second signal to a predetermined value. The liquid crystal display device receives the second signal through a flexible cable and displays a corresponding image.
有關本發明之前述及其他技術內容、特點與功效，在以下配合參考圖式之一較佳實施例的詳細說明中，將可清楚的呈現。以下實施例中所提到的方向用語，例如：上、下、左、右、前或後等，僅是參考附加圖式的方向。因此，使用的方向用語是用來說明並非用來限制本發明。The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only directions referring to the additional drawings. Therefore, the directional terminology used is for the purpose of illustration and not limitation.
第1圖為根據本發明之一手持式電子裝置的一實施例的示意圖。手持式電子裝置10可能是一智慧型手機、一筆記型電腦、一平板電腦、一PDA手機、或是具有藍芽、無線網路或其他無線通信介面的行動裝置。手持式電子裝置10包括一主機板11、一液晶顯示器12、一軟排線13、一主天線14以及一輔助天線15。主天線14以及輔助天線15用以接收無線通信裝置115所需的特定頻段的無線信號。1 is a schematic diagram of an embodiment of a handheld electronic device in accordance with the present invention. The handheld electronic device 10 may be a smart phone, a notebook computer, a tablet computer, a PDA mobile phone, or a mobile device with a Bluetooth, wireless network or other wireless communication interface. The handheld electronic device 10 includes a motherboard 11, a liquid crystal display 12, a flexible cable 13, a main antenna 14, and an auxiliary antenna 15. The primary antenna 14 and the secondary antenna 15 are configured to receive wireless signals of a particular frequency band required by the wireless communication device 115.
主機板11包括處理器111、LVDS控制器112、阻抗轉換電路113、LVDS連接器114與無線通信裝置115。處理器111傳送一影像信號給LVDS控制器112。接著LVDS控制器112將該影像信號轉換為一第一信號，該第一信號為一差分信號對(differential signal pair)。阻抗轉換電路113接收該第一信號並輸出一第二信號，使得該第二信號的特性阻抗為一預定值。液晶顯示器12透過軟排線13而自 LVDS連接器114接收該第二信號，並顯示對應的影像。The motherboard 11 includes a processor 111, an LVDS controller 112, an impedance conversion circuit 113, an LVDS connector 114, and a wireless communication device 115. The processor 111 transmits an image signal to the LVDS controller 112. The LVDS controller 112 then converts the image signal into a first signal, the first signal being a differential signal pair. The impedance conversion circuit 113 receives the first signal and outputs a second signal such that the characteristic impedance of the second signal is a predetermined value. The liquid crystal display 12 is transmitted through the flexible cable 13 The LVDS connector 114 receives the second signal and displays a corresponding image.
依據ANSI/TIA/EIA-644-1995定義的LVDS介面標準，LVDS信號在傳輸時，其特性阻抗的範圍為100Ω±5%。LVDS訊號在傳輸時必須在滿足這種條件的情形下，才能使得信號在主機板11與液晶顯示器12之間被正確地傳輸且避免液晶顯示器12有顯示錯誤，如信號損失、變形和失真。According to the LVDS interface standard defined by ANSI/TIA/EIA-644-1995, the characteristic impedance of the LVDS signal during transmission is in the range of 100 Ω ± 5%. The LVDS signal must be transmitted under such conditions to enable the signal to be correctly transmitted between the motherboard 11 and the liquid crystal display 12 and to prevent display errors such as signal loss, distortion and distortion of the liquid crystal display 12.
因此，當LVDS控制器112要透過LVDS連接器114傳送差分信號對給液晶顯示器12之前，必需先透過阻抗轉換電路113調整LVDS信號傳輸時的特性阻抗，使其特性阻抗能滿足LVDS介面標準。此外，透過阻抗轉換電路113也可以使得LVDS信號在經由軟排線13傳輸時的特性阻抗也能滿足LVDS介面標準。Therefore, before the LVDS controller 112 is to transmit the differential signal pair to the liquid crystal display 12 through the LVDS connector 114, the characteristic impedance of the LVDS signal transmission must be adjusted through the impedance conversion circuit 113 so that the characteristic impedance can satisfy the LVDS interface standard. In addition, the impedance impedance conversion circuit 113 can also make the LVDS signal meet the LVDS interface standard when the characteristic impedance is transmitted via the flexible cable 13.
LVDS控制器112所產生的LVDS信號為一方波信號，而方波信號是由奇數項的諧波所產生，諧波項的數目越多，方波就越完整。諧波項的數目過少，則可能造成液晶顯示器12的顯示問題。一般而言，諧波項的數目為9的時候，大致上就可以維持方波的完整性，使得液晶顯示器12可以正常顯示。The LVDS signal generated by the LVDS controller 112 is a square wave signal, and the square wave signal is generated by harmonics of odd terms. The more the number of harmonic terms, the more complete the square wave. If the number of harmonic terms is too small, the display problem of the liquid crystal display 12 may be caused. In general, when the number of harmonic terms is 9, the integrity of the square wave can be substantially maintained, so that the liquid crystal display 12 can be normally displayed.
但是越多的諧波項，其諧波項的頻率也越容易落入無線通信裝置115的特定頻段，則可能對無線通信裝置115所接收到的信號產生干擾。如果LVDS連接器114為一立體的連接器，則當LVDS信號在傳輸時，LVDS連接器114就可能成為一個雜訊源。又因為手持式電子裝置10的體積小，造成LVDS連接器114與主天線14以及輔助天線15 的距離短，使得由LVDS連接器114發出的高頻雜訊會對主天線14以及輔助天線15接收到的信號造成嚴重的影響。在本實施例中，阻抗轉換電路113亦可以針對可能對無線通信裝置115造成干擾的諧波項進行雜訊過濾或抑制。However, the more harmonic terms, the more likely the frequency of its harmonic terms falls into a particular frequency band of the wireless communication device 115, which may interfere with the signals received by the wireless communication device 115. If the LVDS connector 114 is a stereo connector, the LVDS connector 114 may become a source of noise when the LVDS signal is being transmitted. Also, because of the small size of the handheld electronic device 10, the LVDS connector 114 and the main antenna 14 and the auxiliary antenna 15 are caused. The short distance is such that high frequency noise emitted by the LVDS connector 114 can have a severe effect on the signals received by the primary antenna 14 and the secondary antenna 15. In the present embodiment, the impedance conversion circuit 113 can also perform noise filtering or suppression on harmonic terms that may cause interference to the wireless communication device 115.
在一實施例中，阻抗轉換電路113係由複數個可調式電感與複數個可調式電容所組成，並透過不同的電感值與電容值可消減或抑制特定頻率的雜訊。處理器111可以監控無線通信裝置115接收到的信號品質。如果發現無線通信裝置115接收到的信號品質不佳，或是無線通信裝置115接收到的無線信號的雜訊大於一預定值時，便可動態地調整阻抗轉換電路113的可調式電感的電感值與可調式電容的電容值，來進行抑制雜訊的強度。更清楚的說明請參考第2圖至第4圖。In one embodiment, the impedance conversion circuit 113 is composed of a plurality of adjustable inductors and a plurality of adjustable capacitors, and the noise values of the specific frequencies can be reduced or suppressed by different inductance values and capacitance values. The processor 111 can monitor the quality of the signals received by the wireless communication device 115. If it is found that the signal quality received by the wireless communication device 115 is not good, or the noise of the wireless signal received by the wireless communication device 115 is greater than a predetermined value, the inductance value of the adjustable inductor of the impedance conversion circuit 113 can be dynamically adjusted. The capacitance value of the adjustable capacitor is used to suppress the intensity of the noise. For a clearer explanation, please refer to Figures 2 to 4.
第2圖為一LVDS信號在傳送到液晶顯示器時所產生的雜訊示意圖。第2圖所示的信號雜訊強度僅是用以說明不同的諧波的雜訊強度的示意圖。在第2圖中，假設LVDS信號傳輸時會在頻率70MHz時產生雜訊。因此，在圖上可以發現，以70MHz為倍數的頻率也會因為諧波的原因而有雜訊產生。從圖上可以發現，在910MHz時，也會有雜訊產生，其強度為-80dBm。而在1.8GHz時，也會有雜訊產生，其強度為-90dBm。而頻率910MHz與1.8GHz非常接近全球行動通訊系統(Global System for Mobile Communications，GSM)所採用的兩個頻段，因此如果LVDS信號傳輸的路徑過於接近手持裝置的GSM模組所使用的 天線時，可能就會造成干擾。如果GSM模組所使用的天線的敏感度又太高，譬如說可接收到-100dBm的信號，則第2圖中所示的雜訊就會造成嚴重的干擾。Figure 2 is a schematic diagram of the noise generated when an LVDS signal is transmitted to the liquid crystal display. The signal noise strength shown in Figure 2 is only a schematic diagram to illustrate the noise intensity of different harmonics. In Fig. 2, it is assumed that noise is generated at a frequency of 70 MHz when the LVDS signal is transmitted. Therefore, it can be found in the figure that the frequency in multiples of 70 MHz also causes noise due to harmonics. It can be seen from the figure that at 910MHz, there will be noise generation with an intensity of -80dBm. At 1.8 GHz, there is also noise generation with a strength of -90 dBm. The frequencies of 910MHz and 1.8GHz are very close to the two frequency bands used by the Global System for Mobile Communications (GSM), so if the path of the LVDS signal transmission is too close to that used by the GSM module of the handheld device. When the antenna is used, it may cause interference. If the antenna used in the GSM module is too sensitive, for example, to receive a signal of -100 dBm, the noise shown in Figure 2 will cause serious interference.
為降低如第2圖所示的雜訊干擾，本發明提供了一種阻抗轉換電路，不僅可以降低雜訊干擾，也可以維持LVDS信號傳輸時的特性阻抗。請參考第3圖。第3圖為根據本發明之一阻抗轉換電路的一實施例的示意圖。阻抗轉換電路包括一第一電感L1、一第二電感L2、一第一電容C1以及一第二電容C2。該第一電感L1的一第一端耦接端點N1，該第一電感L1的一第二端耦接端點N3。該第二電感L2的一第一端耦接端點N2，該第二電感L2的一第二端耦接端點N4。該第一電容C1的一第一端耦接端點N1，該第一電容C1的一第二端耦接端點N2。該第二電容C2的一第一端耦接端點N3，該第二電容C2的一第二端耦接端點N4。In order to reduce the noise interference as shown in FIG. 2, the present invention provides an impedance conversion circuit which can not only reduce noise interference but also maintain the characteristic impedance of the LVDS signal transmission. Please refer to Figure 3. Figure 3 is a schematic illustration of an embodiment of an impedance conversion circuit in accordance with the present invention. The impedance conversion circuit includes a first inductor L1, a second inductor L2, a first capacitor C1, and a second capacitor C2. A first end of the first inductor L1 is coupled to the end point N1, and a second end of the first inductor L1 is coupled to the end point N3. A first end of the second inductor L2 is coupled to the end point N2, and a second end of the second inductor L2 is coupled to the end point N4. A first end of the first capacitor C1 is coupled to the end point N1, and a second end of the first capacitor C1 is coupled to the end point N2. A first end of the second capacitor C2 is coupled to the end point N3, and a second end of the second capacitor C2 is coupled to the end point N4.
端點N1耦接LVDS控制器的一第一輸出端，端點N2耦接LVDS控制器的一第二輸出端。端點N3與端點N4耦接至一連接器，如第1圖的LVDS連接器114。The terminal N1 is coupled to a first output of the LVDS controller, and the terminal N2 is coupled to a second output of the LVDS controller. End point N3 and end point N4 are coupled to a connector, such as LVDS connector 114 of FIG.
設計者可以透過調整第一電感L1與第二電感L2的電感值，以及第一電容C1以及第二電容C2的電容值讓LVDS信號傳輸時的特性阻抗能維持在預定值，如100Ω，此外也可以針對特定頻段的雜訊達到抑制甚至濾除的效果。The designer can adjust the inductance value of the first inductor L1 and the second inductor L2, and the capacitance values of the first capacitor C1 and the second capacitor C2 to maintain the characteristic impedance of the LVDS signal transmission at a predetermined value, such as 100 Ω, in addition to The effect of suppressing or even filtering can be achieved for noise in a specific frequency band.
此外第一電感L1與第二電感L2可以使用可調式電感裝置，可以根據處理器的一第一控制信號調整其電感值。第一電容C1以及第二電容C2可以使用可調式電容，並根 據處理器的一第二控制信號調整其電容值。處理器更可監控一無線通信模組的傳送頻段的第一雜訊值與接收頻段的第二雜訊值，決定第一控制信號與第二控制信號，以抑制LVDS信號傳輸時產生的雜訊對無線通信模組所造成的干擾。In addition, the first inductor L1 and the second inductor L2 can use a tunable inductive device, and the inductance value can be adjusted according to a first control signal of the processor. The first capacitor C1 and the second capacitor C2 can use a tunable capacitor, and The capacitance value is adjusted according to a second control signal of the processor. The processor can further monitor the first noise value of the transmission frequency band of the wireless communication module and the second noise value of the receiving frequency band, and determine the first control signal and the second control signal to suppress the noise generated when the LVDS signal is transmitted. The interference caused by the wireless communication module.
請參考第4圖。第4圖為第3圖的阻抗轉換電路的模擬波形圖。在產生第4圖的模擬波形時，第一電感L1與第二電感L2的電感值的設定為33nH，第一電容C1以及第二電容C2的電容值則設定為3.9pF。第4圖中，m1表示第一諧波、m2表示第三諧波、m3表示第五諧波、m4表示第七諧波、m5表示第九諧波、m6表示第十一諧波、m7表示第十三諧波。Please refer to Figure 4. Fig. 4 is an analog waveform diagram of the impedance conversion circuit of Fig. 3. When the analog waveform of FIG. 4 is generated, the inductance values of the first inductor L1 and the second inductor L2 are set to 33 nH, and the capacitance values of the first capacitor C1 and the second capacitor C2 are set to 3.9 pF. In Fig. 4, m1 represents the first harmonic, m2 represents the third harmonic, m3 represents the fifth harmonic, m4 represents the seventh harmonic, m5 represents the ninth harmonic, m6 represents the eleventh harmonic, m7 represents The thirteenth harmonic.
在本次模擬中，各諧波的頻率與信號損耗如後所述。第一諧波的頻率為70.98MHz，第一諧波的損耗為0.224dBm。第三諧波的頻率為212.9MHz，第三諧波的損耗為0.478dBm。第五諧波的頻率為354.9MHz，第五諧波的損耗為1.468dBm。第七諧波的頻率為496.8MHz，第七諧波的損耗為5.287dBm。第九諧波的頻率為638.8MHz，第九諧波的損耗為10.992dBm。In this simulation, the frequency and signal loss of each harmonic are as described later. The frequency of the first harmonic is 70.98 MHz, and the loss of the first harmonic is 0.224 dBm. The third harmonic has a frequency of 212.9 MHz and the third harmonic has a loss of 0.478 dBm. The frequency of the fifth harmonic is 354.9 MHz, and the loss of the fifth harmonic is 1.468 dBm. The seventh harmonic has a frequency of 496.8 MHz and the seventh harmonic has a loss of 5.287 dBm. The frequency of the ninth harmonic is 638.8 MHz, and the loss of the ninth harmonic is 10.992 dBm.
在第九諧波時的信號損耗約為11dBm，因此大致可維持LVDS信號的方波完整性，且不會損耗。The signal loss at the ninth harmonic is about 11 dBm, so the square wave integrity of the LVDS signal can be substantially maintained without loss.
GSM850的RX頻帶範圍是869MHz~894MHz，約落在第十一諧波(頻率為868.7MHz)，損耗為19.641dBm。GSM1800的RX頻帶範圍是1.805GHz~1.88GHz，約落在第十三諧波(頻率為1.806GHz)，損耗為46.794dBm。The RX band of the GSM850 ranges from 869 MHz to 894 MHz, which falls on the eleventh harmonic (frequency is 868.7 MHz) and the loss is 19.641 dBm. The RX band of the GSM1800 ranges from 1.805 GHz to 1.88 GHz, which falls on the thirteenth harmonic (frequency of 1.806 GHz) with a loss of 46.794 dBm.
比較第2圖中的910MHz的功率損耗及第4圖中的第十一諧波的損耗；及比較第2圖中的1.8GHz的功率損耗及第4圖中的第十三諧波的信號損耗，可明顯看出高頻雜訊對無線通信模組(如GSM模組)的影響可以有效的被降低。Compare the power loss of 910 MHz in Fig. 2 with the loss of the eleventh harmonic in Fig. 4; and compare the power loss of 1.8 GHz in Fig. 2 and the signal loss of the thirteenth harmonic in Fig. 4. It can be clearly seen that the influence of high frequency noise on the wireless communication module (such as GSM module) can be effectively reduced.
第5圖為根據本發明之一阻抗轉換電路的一實施例的示意圖。阻抗轉換電路包括一第一電路51與一第二電路52。在本實施例中，只以一個第二電路52為例說明，但非將本發明限制於此。設計者可依據需要，使用兩個或兩個以上的第二電路52。端點N1與端點N2耦接至一LVDS控制器，端點N3與端點N4耦接至一連接器，且該連接器透過一軟性電路板與一液晶顯示器連接。Figure 5 is a schematic diagram of an embodiment of an impedance conversion circuit in accordance with the present invention. The impedance conversion circuit includes a first circuit 51 and a second circuit 52. In the present embodiment, only one second circuit 52 is taken as an example, but the present invention is not limited thereto. The designer can use two or more second circuits 52 as needed. The terminal N1 and the terminal N2 are coupled to an LVDS controller, and the terminal N3 and the terminal N4 are coupled to a connector, and the connector is connected to a liquid crystal display through a flexible circuit board.
第一電路51包括一第一電感L1、一第二電感L2、一第一電容C1以及一第二電容C2。第二電路52包括一第三電感L3、一第四電感L4以及一第三電容。The first circuit 51 includes a first inductor L1, a second inductor L2, a first capacitor C1, and a second capacitor C2. The second circuit 52 includes a third inductor L3, a fourth inductor L4, and a third capacitor.
第一電感L1的一第一端耦接端點N1，第一電感L1的一第二端耦接第三電感L3的一第一端。第二電感L2的一第一端耦接端點N2，第二電感L2的一第二端耦接第四電感的一第一端。第一電容C1的一第一端耦接端點N1，第一電容C1的一第二端耦接端點N2。第二電容C2的一第一端耦接第一電感L1的第二端，第二電容C2的一第二端耦接第二電感L2的第二端。A first end of the first inductor L1 is coupled to the terminal N1, and a second end of the first inductor L1 is coupled to a first end of the third inductor L3. A first end of the second inductor L2 is coupled to the end point N2, and a second end of the second inductor L2 is coupled to a first end of the fourth inductor. A first end of the first capacitor C1 is coupled to the end point N1, and a second end of the first capacitor C1 is coupled to the end point N2. A second end of the second capacitor C2 is coupled to the second end of the second inductor L2, and a second end of the second capacitor C2 is coupled to the second end of the second inductor L2.
第三電感L3的第一端耦接第一電感L1的第二端，第三電感L3的第二端耦接端點N3。第四電感L4的第一端耦接至第二電感L2的第二端，第四電感L4的第二端耦接端點N4。第三電容C3的第一端耦接端點N3，第三電容C3 的第二端耦接端點N4。The first end of the third inductor L3 is coupled to the second end of the first inductor L1, and the second end of the third inductor L3 is coupled to the end point N3. The first end of the fourth inductor L4 is coupled to the second end of the second inductor L2, and the second end of the fourth inductor L4 is coupled to the end point N4. The first end of the third capacitor C3 is coupled to the end point N3, and the third capacitor C3 The second end is coupled to the end point N4.
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內容所作之簡單的等效變化與修飾，皆仍屬本發明專利涵蓋之範圍內。另外本發明的任一實施例或申請專利範圍不須達成本發明所揭露之全部目的或優點或特點。此外，摘要部分和標題僅是用來輔助專利文件搜尋之用，並非用來限制本發明之權利範圍。The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent. In addition, any of the objects or advantages or features of the present invention are not required to be achieved by any embodiment or application of the invention. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention.
10‧‧‧手持式電子裝置10‧‧‧Handheld electronic devices
11‧‧‧主機板11‧‧‧ motherboard
12‧‧‧液晶顯示器12‧‧‧LCD display
13‧‧‧軟排線13‧‧‧Soft cable
14‧‧‧主天線14‧‧‧Main antenna
15‧‧‧輔助天線15‧‧‧Auxiliary antenna
111‧‧‧處理器111‧‧‧ Processor
112‧‧‧LVDS控制器112‧‧‧LVDS controller
113‧‧‧阻抗轉換電路113‧‧‧ impedance conversion circuit
114‧‧‧LVDS連接器114‧‧‧LVDS connector
115‧‧‧無線通信裝置115‧‧‧Wireless communication device
第1圖為根據本發明之一手持式電子裝置的一實施例的示意圖。1 is a schematic diagram of an embodiment of a handheld electronic device in accordance with the present invention.
第2圖為一LVDS信號在傳送到液晶顯示器時所產生的雜訊示意圖。Figure 2 is a schematic diagram of the noise generated when an LVDS signal is transmitted to the liquid crystal display.
第3圖為根據本發明之一阻抗轉換電路的一實施例的示意圖。Figure 3 is a schematic illustration of an embodiment of an impedance conversion circuit in accordance with the present invention.
第4圖為第3圖的阻抗轉換電路的模擬波形圖。Fig. 4 is an analog waveform diagram of the impedance conversion circuit of Fig. 3.
第5圖為根據本發明之一阻抗轉換電路的一實施例的示意圖。Figure 5 is a schematic diagram of an embodiment of an impedance conversion circuit in accordance with the present invention.
10‧‧‧手持式電子裝置10‧‧‧Handheld electronic devices
11‧‧‧主機板11‧‧‧ motherboard
12‧‧‧液晶顯示器12‧‧‧LCD display
13‧‧‧軟排線13‧‧‧Soft cable
14‧‧‧主天線14‧‧‧Main antenna
15‧‧‧輔助天線15‧‧‧Auxiliary antenna
111‧‧‧處理器111‧‧‧ Processor
112‧‧‧LVDS控制器112‧‧‧LVDS controller
113‧‧‧阻抗轉換電路113‧‧‧ impedance conversion circuit
114‧‧‧LVDS連接器114‧‧‧LVDS connector
115‧‧‧無線通信裝置115‧‧‧Wireless communication device
Claims (7)
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|---|---|---|---|
| TW101113573A TWI488466B (en) | 2012-04-17 | 2012-04-17 | Portable device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101113573A TWI488466B (en) | 2012-04-17 | 2012-04-17 | Portable device |
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| Publication Number | Publication Date |
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| TW201345208A TW201345208A (en) | 2013-11-01 |
| TWI488466B true TWI488466B (en) | 2015-06-11 |
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| TW101113573A TWI488466B (en) | 2012-04-17 | 2012-04-17 | Portable device |
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| TW (1) | TWI488466B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200512706A (en) * | 2003-09-26 | 2005-04-01 | Mstar Semiconductor Inc | Display control device with multipurpose output driver |
| US20100144305A1 (en) * | 2008-12-05 | 2010-06-10 | Passif Semiconductor Corporation | Passive Wireless Receiver |
| EP2095518B1 (en) * | 2006-12-12 | 2010-12-08 | Telefonaktiebolaget LM Ericsson (publ) | Method and apparatus for receiving radio frequency signals |
| TW201132109A (en) * | 2010-03-05 | 2011-09-16 | Aten Int Co Ltd | Transmitter, receiver and extender system |
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2012
- 2012-04-17 TW TW101113573A patent/TWI488466B/en active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200512706A (en) * | 2003-09-26 | 2005-04-01 | Mstar Semiconductor Inc | Display control device with multipurpose output driver |
| EP2095518B1 (en) * | 2006-12-12 | 2010-12-08 | Telefonaktiebolaget LM Ericsson (publ) | Method and apparatus for receiving radio frequency signals |
| US20100144305A1 (en) * | 2008-12-05 | 2010-06-10 | Passif Semiconductor Corporation | Passive Wireless Receiver |
| TW201132109A (en) * | 2010-03-05 | 2011-09-16 | Aten Int Co Ltd | Transmitter, receiver and extender system |
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| TW201345208A (en) | 2013-11-01 |
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