TWI723924B

TWI723924B - Signal transmission system

Info

Publication number: TWI723924B
Application number: TW109124970A
Authority: TW
Inventors: 吳宗翰; 陳東山
Original assignee: 聯陽半導體股份有限公司
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-04-01
Also published as: TW202205822A

Abstract

A signal transmission system includes a signal redriver circuit, a first device, a first switch, a first termination circuit, a first detection circuit, a second device, a second switch, a second termination circuit, and a termination control circuit. The first device is connected to the signal redriver circuit. A first end of the first switch is coupled to the signal redriver circuit and the first device. The first termination circuit is coupled to the second end of the first switch. The first detection circuit is coupled to the first device and the signal redriver circuit. A first end of the second switch is coupled to the signal redriver circuit and the second device. The second termination circuit is coupled to the second end of the second switch. The second detection circuit is coupled to the second device and the signal redriver circuit. The termination control circuit is coupled to the first detection circuit, the second detection circuit, the first switch, the second switch and the signal redriver circuit.

Description

Signal transmission system

本發明係關於一種訊號傳輸系統，尤指一種能節省耗電的訊號傳輸系統。The present invention relates to a signal transmission system, in particular to a signal transmission system that can save power.

許多常見介面的訊號傳輸系統，例如，通用序列匯流排（Universal Serial Bus, USB），乙太網路（Ethernet），高畫質多媒體介面（High Definition Multimedia Interface, HDMI）等，皆有連線偵測與訊號傳輸雙重功能。訊號傳輸系統一般會包括訊號中繼電路。訊號中繼電路一般的做法是將其一端的線路訊號傳遞至另一端。然而在大部分的時間，訊號中繼電路只有一端連接到裝置，而另一端並沒有連接到任何裝置，此時若訊號中繼電路持續運作，會造成無謂的電力耗損。Many common interface signal transmission systems, such as Universal Serial Bus (USB), Ethernet, High Definition Multimedia Interface (HDMI), etc., all have connection detection Dual functions of measurement and signal transmission. Signal transmission systems generally include signal relay circuits. The general method of a signal relay circuit is to transmit the line signal from one end to the other end. However, most of the time, only one end of the signal relay circuit is connected to the device, and the other end is not connected to any device. At this time, if the signal relay circuit continues to operate, it will cause unnecessary power consumption.

本發明實施例提供一種訊號傳輸系統，包括訊號中繼電路，第一裝置，第一開關，第一終端電路，第一偵測電路，第二裝置，第二開關，第二偵測電路，第二終端電路及終端控制電路。第一裝置連接於訊號中繼電路。第一開關包含第一端及第二端，第一開關的第一端耦接於訊號中繼電路及第一裝置。第一終端電路耦接第一開關之第二端，用以於第一開關導通時，導通第一裝置與訊號中繼電路的電連接。第一偵測電路耦接第一裝置及訊號中繼電路，用以偵測第一裝置是否成功地與訊號中繼電路相連接。第二裝置連接於訊號中繼電路。第二開關包含第一端及第二端，第二開關的第一端耦接於訊號中繼電路及第二裝置。第二終端電路耦接第二開關之第二端，用以於第二開關導通時，導通第二裝置與訊號中繼電路的電連接。第二偵測電路耦接第二裝置及訊號中繼電路，用以偵測第二裝置是否成功地與訊號中繼電路相連接。終端控制電路耦接第一偵測電路、第二偵測電路、第一開關、第二開關及訊號中繼電路，用以根據第一偵測電路及第二偵測電路的偵測結果導通或截止第一開關及第二開關，及於第一開關及第二開關被導通時，開啟該訊號中繼電路。若第一裝置成功地與訊號中繼電路相連接，且第二裝置成功地與訊號中繼電路相連接，則終端控制電路導通第一開關及第二開關。An embodiment of the present invention provides a signal transmission system including a signal relay circuit, a first device, a first switch, a first terminal circuit, a first detection circuit, a second device, a second switch, and a second detection circuit, The second terminal circuit and the terminal control circuit. The first device is connected to the signal relay circuit. The first switch includes a first terminal and a second terminal. The first terminal of the first switch is coupled to the signal relay circuit and the first device. The first terminal circuit is coupled to the second end of the first switch, and is used to conduct the electrical connection between the first device and the signal relay circuit when the first switch is turned on. The first detection circuit is coupled to the first device and the signal relay circuit for detecting whether the first device is successfully connected to the signal relay circuit. The second device is connected to the signal relay circuit. The second switch includes a first terminal and a second terminal. The first terminal of the second switch is coupled to the signal relay circuit and the second device. The second terminal circuit is coupled to the second end of the second switch, and is used to conduct the electrical connection between the second device and the signal relay circuit when the second switch is turned on. The second detection circuit is coupled to the second device and the signal relay circuit for detecting whether the second device is successfully connected to the signal relay circuit. The terminal control circuit is coupled to the first detection circuit, the second detection circuit, the first switch, the second switch and the signal relay circuit for conducting according to the detection results of the first detection circuit and the second detection circuit Or turn off the first switch and the second switch, and turn on the signal relay circuit when the first switch and the second switch are turned on. If the first device is successfully connected to the signal relay circuit and the second device is successfully connected to the signal relay circuit, the terminal control circuit turns on the first switch and the second switch.

本發明實施例另提供一種訊號傳輸系統，包括第一訊號中繼電路，第二訊號中繼電路，第一裝置，第一開關，第二開關第一終端電路，第一偵測電路，第二裝置，第三開關，第四開關，第二終端電路，第二偵測電路及終端控制電路。第一裝置連接於第一訊號中繼電路及第二訊號中繼電路。第一開關包含第一端及第二端，第一端耦接於第一訊號中繼電路及第一裝置。第二開關第一端及第二端，第一端耦接於第二訊號中繼電路及第一裝置。第一終端電路耦接第一開關之第二端及第二開關之第二端，用以於第一開關及第二開關導通時，導通第一裝置與第一訊號中繼電路的電連接，及導通第一裝置與第二訊號中繼電路的電連接。第一偵測電路耦接第一裝置及第二訊號中繼電路，用以偵測第一裝置是否成功地與第二訊號中繼電路相連接。第二裝置連接於第一訊號中繼電路及第二訊號中繼電路。第三開關包含第一端及第二端，第一端耦接於第一訊號中繼電路及第二裝置。第四開關包含第一端及第二端，第一端耦接於第二訊號中繼電路及第二裝置。第二終端電路耦接第三開關之第二端及第四開關之第二端，用以於第三開關及第四開關導通時，導通第二裝置與第一訊號中繼電路的電連接，及導通第二裝置與第二訊號中繼電路的電連接。第二偵測電路耦接第二裝置及第一訊號中繼電路，用以偵測第二裝置是否成功地與第一訊號中繼電路相連接。終端控制電路耦接第一偵測電路、第二偵測電路、第一開關、第二開關、第三開關、第四開關、第一訊號中繼電路及第二訊號中繼電路，用以根據第一偵測電路及第二偵測電路的偵測結果導通或截止第一開關、第二開關、第三開關及第四開關，於第一開關及第三開關被導通時，開啟第一訊號中繼電路，及於第二開關及第四開關被導通時，開啟第二訊號中繼電路。若第一裝置成功地與第二訊號中繼電路相連接，且第二裝置成功地與第一訊號中繼電路相連接，則終端控制電路導通第一開關、第二開關、第三開關及第四開關。The embodiment of the present invention further provides a signal transmission system, including a first signal relay circuit, a second signal relay circuit, a first device, a first switch, a second switch, a first terminal circuit, and a first detection circuit, The second device, the third switch, the fourth switch, the second terminal circuit, the second detection circuit and the terminal control circuit. The first device is connected to the first signal relay circuit and the second signal relay circuit. The first switch includes a first terminal and a second terminal. The first terminal is coupled to the first signal relay circuit and the first device. The first terminal and the second terminal of the second switch are coupled to the second signal relay circuit and the first device. The first terminal circuit is coupled to the second terminal of the first switch and the second terminal of the second switch, and is used to conduct the electrical connection between the first device and the first signal relay circuit when the first switch and the second switch are turned on , And conduct the electrical connection between the first device and the second signal relay circuit. The first detection circuit is coupled to the first device and the second signal relay circuit for detecting whether the first device is successfully connected to the second signal relay circuit. The second device is connected to the first signal relay circuit and the second signal relay circuit. The third switch includes a first terminal and a second terminal. The first terminal is coupled to the first signal relay circuit and the second device. The fourth switch includes a first terminal and a second terminal. The first terminal is coupled to the second signal relay circuit and the second device. The second terminal circuit is coupled to the second end of the third switch and the second end of the fourth switch, and is used to conduct the electrical connection between the second device and the first signal relay circuit when the third switch and the fourth switch are turned on , And conduct the electrical connection between the second device and the second signal relay circuit. The second detection circuit is coupled to the second device and the first signal relay circuit for detecting whether the second device is successfully connected to the first signal relay circuit. The terminal control circuit is coupled to the first detection circuit, the second detection circuit, the first switch, the second switch, the third switch, the fourth switch, the first signal relay circuit, and the second signal relay circuit. According to the detection results of the first detection circuit and the second detection circuit, the first switch, the second switch, the third switch, and the fourth switch are turned on or off. When the first switch and the third switch are turned on, the first switch is turned on. A signal relay circuit, and when the second switch and the fourth switch are turned on, the second signal relay circuit is turned on. If the first device is successfully connected to the second signal relay circuit, and the second device is successfully connected to the first signal relay circuit, the terminal control circuit turns on the first switch, the second switch, and the third switch And the fourth switch.

本發明實施例另提供一種訊號傳輸系統，包括第一訊號中繼電路，第二訊號中繼電路，第一裝置，第一開關，第二開關第一終端電路，第一偵測電路，第二裝置，第三開關，第四開關，第二終端電路，第二偵測電路及終端控制電路。第一裝置連接於第一訊號中繼電路及第二訊號中繼電路。第一開關包含第一端及第二端，第一端耦接於第一訊號中繼電路及第一裝置。第二開關第一端及第二端，第一端耦接於第二訊號中繼電路及第一裝置。第一終端電路耦接第一開關之第二端及第二開關之第二端，用以於第一開關及第二開關導通時，導通第一裝置與第一訊號中繼電路的電連接，及導通第一裝置與第二訊號中繼電路的電連接。第一偵測電路耦接第一裝置及第一訊號中繼電路，用以偵測第一裝置是否成功地與第一訊號中繼電路相連接，且耦接第一裝置及第二訊號中繼電路，用以偵測第一裝置是否成功地與第二訊號中繼電路相連接。第二裝置連接於第一訊號中繼電路及第二訊號中繼電路。第三開關包含第一端及第二端，第一端耦接於第一訊號中繼電路及第二裝置。第四開關包含第一端及第二端，第一端耦接於第二訊號中繼電路及第二裝置。第二終端電路耦接第三開關之第二端及第四開關之第二端，用以於第三開關及第四開關導通時，導通第二裝置與第一訊號中繼電路的電連接，及導通第二裝置與第二訊號中繼電路的電連接。第二偵測電路耦接第二裝置及第一訊號中繼電路，用以偵測第二裝置是否成功地與第一訊號中繼電路相連接，且耦接第二裝置及第二訊號中繼電路，用以偵測第二裝置是否成功地與第二訊號中繼電路相連接。終端控制電路耦接第一偵測電路、第二偵測電路、第一開關、第二開關、第三開關、第四開關、第一訊號中繼電路及第二訊號中繼電路，用以根據第一偵測電路及第二偵測電路的偵測結果導通或截止第一開關、第二開關、第三開關及第四開關，於第一開關及第三開關被導通時，開啟第一訊號中繼電路，及於第二開關及第四開關被導通時，開啟第二訊號中繼電路。若第一裝置成功地與第一訊號中繼電路及第二訊號中繼電路相連接，且第二裝置成功地與第一訊號中繼電路及第二訊號中繼電路相連接，則終端控制電路導通第一開關、第二開關、第三開關及第四開關。The embodiment of the present invention further provides a signal transmission system, including a first signal relay circuit, a second signal relay circuit, a first device, a first switch, a second switch, a first terminal circuit, and a first detection circuit, The second device, the third switch, the fourth switch, the second terminal circuit, the second detection circuit and the terminal control circuit. The first device is connected to the first signal relay circuit and the second signal relay circuit. The first switch includes a first terminal and a second terminal. The first terminal is coupled to the first signal relay circuit and the first device. The first terminal and the second terminal of the second switch are coupled to the second signal relay circuit and the first device. The first terminal circuit is coupled to the second terminal of the first switch and the second terminal of the second switch, and is used to conduct the electrical connection between the first device and the first signal relay circuit when the first switch and the second switch are turned on , And conduct the electrical connection between the first device and the second signal relay circuit. The first detection circuit is coupled to the first device and the first signal relay circuit for detecting whether the first device is successfully connected to the first signal relay circuit, and is coupled to the first device and the second signal The relay circuit is used to detect whether the first device is successfully connected to the second signal relay circuit. The second device is connected to the first signal relay circuit and the second signal relay circuit. The third switch includes a first terminal and a second terminal. The first terminal is coupled to the first signal relay circuit and the second device. The fourth switch includes a first terminal and a second terminal. The first terminal is coupled to the second signal relay circuit and the second device. The second terminal circuit is coupled to the second end of the third switch and the second end of the fourth switch, and is used to conduct the electrical connection between the second device and the first signal relay circuit when the third switch and the fourth switch are turned on , And conduct the electrical connection between the second device and the second signal relay circuit. The second detection circuit is coupled to the second device and the first signal relay circuit for detecting whether the second device is successfully connected to the first signal relay circuit, and is coupled to the second device and the second signal The relay circuit is used to detect whether the second device is successfully connected to the second signal relay circuit. The terminal control circuit is coupled to the first detection circuit, the second detection circuit, the first switch, the second switch, the third switch, the fourth switch, the first signal relay circuit, and the second signal relay circuit. According to the detection results of the first detection circuit and the second detection circuit, the first switch, the second switch, the third switch, and the fourth switch are turned on or off. When the first switch and the third switch are turned on, the first switch is turned on. A signal relay circuit, and when the second switch and the fourth switch are turned on, the second signal relay circuit is turned on. If the first device is successfully connected to the first signal relay circuit and the second signal relay circuit, and the second device is successfully connected to the first signal relay circuit and the second signal relay circuit, Then the terminal control circuit turns on the first switch, the second switch, the third switch and the fourth switch.

第1圖為本發明實施例之訊號傳輸系統100的示意圖。訊號傳輸系統100包括訊號中繼電路150，第一裝置110，第一開關170，第一終端電路130A，第一偵測電路140A，第二裝置120，第二開關180，第二偵測電路140B，第二終端電路130B及終端控制電路160。FIG. 1 is a schematic diagram of a signal transmission system 100 according to an embodiment of the present invention. The signal transmission system 100 includes a signal relay circuit 150, a first device 110, a first switch 170, a first terminal circuit 130A, a first detection circuit 140A, a second device 120, a second switch 180, and a second detection circuit 140B, the second terminal circuit 130B and the terminal control circuit 160.

第一裝置110連接於訊號中繼電路150。第一開關170包含第一端及第二端，第一開關170的第一端耦接於訊號中繼電路150及第一裝置110。第一終端電路130A耦接第一開關170之第二端，用以於第一開關170導通時，導通第一裝置110與訊號中繼電路150的電連接(electrical connectivity)。第一偵測電路140A耦接第一裝置110及訊號中繼電路150，用以偵測第一裝置110是否成功地與訊號中繼電路150相連接。第二裝置120連接於訊號中繼電路150。第二開關180包含第一端及第二端，第二開關180的第一端耦接於訊號中繼電路150及第二裝置120。第二終端電路130B耦接第二開關180之第二端，用以於第二開關180導通時，導通第二裝置120與訊號中繼電路150的電連接。第二偵測電路140B耦接第二裝置120及訊號中繼電路150，用以偵測第二裝置120是否成功地與訊號中繼電路150相連接。終端控制電路160耦接第一偵測電路140A、第二偵測電路140B、第一開關170、第二開關180及訊號中繼電路150，用以根據第一偵測電路140A及第二偵測電路140B的偵測結果導通或截止第一開關170及第二開關180，及於第一開關170及第二開關180被導通時，開啟訊號中繼電路150。當訊號中繼電路150接收到由第一裝置110傳來之訊號時，訊號中繼電路150會重新產生訊號並將訊號傳到第二裝置120。The first device 110 is connected to the signal relay circuit 150. The first switch 170 includes a first terminal and a second terminal. The first terminal of the first switch 170 is coupled to the signal relay circuit 150 and the first device 110. The first terminal circuit 130A is coupled to the second end of the first switch 170 for conducting electrical connectivity between the first device 110 and the signal relay circuit 150 when the first switch 170 is turned on. The first detection circuit 140A is coupled to the first device 110 and the signal relay circuit 150 for detecting whether the first device 110 is successfully connected to the signal relay circuit 150. The second device 120 is connected to the signal relay circuit 150. The second switch 180 includes a first terminal and a second terminal. The first terminal of the second switch 180 is coupled to the signal relay circuit 150 and the second device 120. The second terminal circuit 130B is coupled to the second end of the second switch 180 for conducting the electrical connection between the second device 120 and the signal relay circuit 150 when the second switch 180 is turned on. The second detection circuit 140B is coupled to the second device 120 and the signal relay circuit 150 for detecting whether the second device 120 is successfully connected to the signal relay circuit 150. The terminal control circuit 160 is coupled to the first detection circuit 140A, the second detection circuit 140B, the first switch 170, the second switch 180, and the signal relay circuit 150, and is used according to the first detection circuit 140A and the second detection circuit 140A. The detection result of the test circuit 140B turns on or off the first switch 170 and the second switch 180, and when the first switch 170 and the second switch 180 are turned on, the signal relay circuit 150 is turned on. When the signal relay circuit 150 receives the signal from the first device 110, the signal relay circuit 150 regenerates the signal and transmits the signal to the second device 120.

若第一偵測電路140A偵測到第一裝置110成功地與訊號中繼電路150相連接，且第二偵測電路140B偵測到第二裝置120成功地與訊號中繼電路150相連接，則終端控制電路導通第一開關170及第二開關180。若第一偵測電路140A偵測到第一裝置110並未成功地與訊號中繼電路150相連接及/或第二偵測電路140B偵測到第二裝置120並未成功地與訊號中繼電路150相連接，則終端控制電路160截止第一開關170及第二開關180。If the first detection circuit 140A detects that the first device 110 is successfully connected to the signal relay circuit 150, and the second detection circuit 140B detects that the second device 120 is successfully connected to the signal relay circuit 150 If connected, the terminal control circuit turns on the first switch 170 and the second switch 180. If the first detection circuit 140A detects that the first device 110 is not successfully connected to the signal relay circuit 150 and/or the second detection circuit 140B detects that the second device 120 is not successfully connected to the signal When the relay circuit 150 is connected, the terminal control circuit 160 turns off the first switch 170 and the second switch 180.

第一終端電路130A及第二終端電路130B可為阻抗匹配電路，當終端控制電路160導通第一開關170時，第一終端電路130A可降低第一裝置110與訊號中繼電路150之間的阻抗，如此即可導通第一裝置110與訊號中繼電路150的電連接。當終端控制電路160導通第二開關180時，第二終端電路130B可降低第二裝置120與訊號中繼電路150之間的阻抗，如此即可導通第二裝置120與訊號中繼電路150的電連接。此時，終端控制電路160可開啟訊號中繼電路150，使第一裝置110與第二裝置120呈連線狀態，並可彼此傳輸訊號。The first terminal circuit 130A and the second terminal circuit 130B can be impedance matching circuits. When the terminal control circuit 160 turns on the first switch 170, the first terminal circuit 130A can reduce the gap between the first device 110 and the signal relay circuit 150. In this way, the electrical connection between the first device 110 and the signal relay circuit 150 can be conducted. When the terminal control circuit 160 turns on the second switch 180, the second terminal circuit 130B can reduce the impedance between the second device 120 and the signal relay circuit 150, so that the second device 120 and the signal relay circuit 150 can be turned on Electrical connection. At this time, the terminal control circuit 160 can turn on the signal relay circuit 150, so that the first device 110 and the second device 120 are in a connected state and can transmit signals to each other.

舉例而言，訊號傳輸系統100可為通用序列匯流排（Universal Serial Bus, USB），乙太網路（Ethernet）或高畫質多媒體介面（High Definition Multimedia Interface, HDMI）。第一裝置110及第二裝置120皆為訊號收發裝置，例如，通用序列匯流排裝置，乙太網路裝置，高畫質多媒體介面裝置等，並透過訊號中繼電路150收發訊號。For example, the signal transmission system 100 can be a Universal Serial Bus (USB), Ethernet or High Definition Multimedia Interface (HDMI). The first device 110 and the second device 120 are both signal transceiver devices, such as universal serial bus devices, Ethernet devices, high-definition multimedia interface devices, etc., and transmit and receive signals through the signal relay circuit 150.

第2圖為本發明另一實施例之訊號傳輸系統200的示意圖。訊號傳輸系統200包括第一訊號中繼電路250A，第二訊號中繼電路250B，第一裝置210，第一開關270，第二開關275，第一終端電路230A，第一偵測電路240A，第二裝置220，第三開關280，第四開關285，第二終端電路230A，第二偵測電路240B及終端控制電路260。FIG. 2 is a schematic diagram of a signal transmission system 200 according to another embodiment of the present invention. The signal transmission system 200 includes a first signal relay circuit 250A, a second signal relay circuit 250B, a first device 210, a first switch 270, a second switch 275, a first terminal circuit 230A, and a first detection circuit 240A , The second device 220, the third switch 280, the fourth switch 285, the second terminal circuit 230A, the second detection circuit 240B and the terminal control circuit 260.

第一裝置210連接於第一訊號中繼電路250A及第二訊號中繼電路250B。第一開關270包含第一端及第二端，第一端耦接於第一訊號中繼電路250A及第一裝置210。第二開關275包含第一端及第二端，第一端耦接於第二訊號中繼電路250B及第一裝置210。第一終端電路230A耦接第一開關270之第二端及第二開關275之第二端，用以於第一開關270及第二開關275導通時，導通第一裝置210與第一訊號中繼電路250A的電連接，及導通第一裝置210與第二訊號中繼電路250B的電連接。第一偵測電路240A耦接第一裝置210及第二訊號中繼電路250B，用以偵測第一裝置210是否成功地與第二訊號中繼電路250B相連接。第二裝置220連接於第一訊號中繼電路250A及第二訊號中繼電路250B。第三開關280包含第一端及第二端，第一端耦接於第一訊號中繼電路250A及第二裝置220。第四開關285包含第一端及第二端，第一端耦接於第二訊號中繼電路250B及第二裝置220。第二終端電路230B耦接第三開關280之第二端及第四開關285之第二端，用以於第三開關280及第四開關285導通時，導通第二裝置220與第一訊號中繼電路250A的電連接，及導通第二裝置220與第二訊號中繼電路250B的電連接。第二偵測電路240B耦接第二裝置220及第一訊號中繼電路250A，用以偵測第二裝置220是否成功地與第一訊號中繼電路250A相連接。終端控制電路260耦接第一偵測電路240A、第二偵測電路240B、第一開關270、第二開關275、第三開關280、第四開關285、第一訊號中繼電路250A及第二訊號中繼電路250B，用以根據第一偵測電路240A及第二偵測電路240B的偵測結果導通或截止第一開關270、第二開關275、第三開關280及第四開關285，於第一開關270及第三開關280被導通時，開啟第一訊號中繼電路250A，及於第二開關275及第四開關285被導通時，開啟第二訊號中繼電路250B。The first device 210 is connected to the first signal relay circuit 250A and the second signal relay circuit 250B. The first switch 270 includes a first terminal and a second terminal. The first terminal is coupled to the first signal relay circuit 250A and the first device 210. The second switch 275 includes a first terminal and a second terminal. The first terminal is coupled to the second signal relay circuit 250B and the first device 210. The first terminal circuit 230A is coupled to the second end of the first switch 270 and the second end of the second switch 275, and is used to conduct the first device 210 and the first signal when the first switch 270 and the second switch 275 are turned on The electrical connection of the relay circuit 250A and the electrical connection of the first device 210 and the second signal relay circuit 250B are conducted. The first detection circuit 240A is coupled to the first device 210 and the second signal relay circuit 250B for detecting whether the first device 210 is successfully connected to the second signal relay circuit 250B. The second device 220 is connected to the first signal relay circuit 250A and the second signal relay circuit 250B. The third switch 280 includes a first terminal and a second terminal. The first terminal is coupled to the first signal relay circuit 250A and the second device 220. The fourth switch 285 includes a first terminal and a second terminal. The first terminal is coupled to the second signal relay circuit 250B and the second device 220. The second terminal circuit 230B is coupled to the second end of the third switch 280 and the second end of the fourth switch 285, and is used to turn on the second device 220 and the first signal when the third switch 280 and the fourth switch 285 are turned on The electrical connection of the relay circuit 250A and the electrical connection of the second device 220 and the second signal relay circuit 250B are conducted. The second detection circuit 240B is coupled to the second device 220 and the first signal relay circuit 250A for detecting whether the second device 220 is successfully connected to the first signal relay circuit 250A. The terminal control circuit 260 is coupled to the first detection circuit 240A, the second detection circuit 240B, the first switch 270, the second switch 275, the third switch 280, the fourth switch 285, the first signal relay circuit 250A, and the The second signal relay circuit 250B is used to turn on or turn off the first switch 270, the second switch 275, the third switch 280, and the fourth switch 285 according to the detection results of the first detection circuit 240A and the second detection circuit 240B When the first switch 270 and the third switch 280 are turned on, the first signal relay circuit 250A is turned on, and when the second switch 275 and the fourth switch 285 are turned on, the second signal relay circuit 250B is turned on.

當第一訊號中繼電路250A接收到由第一裝置210傳來之第一訊號時，第一訊號中繼電路250A會重新產生第一訊號並將第一訊號傳到第二裝置220；當第二訊號中繼電路250B接收到由第二裝置220傳來之第二訊號時，第二訊號中繼電路250B會重新產生第二訊號並將第二訊號傳到第一裝置210。When the first signal relay circuit 250A receives the first signal from the first device 210, the first signal relay circuit 250A regenerates the first signal and transmits the first signal to the second device 220; When the second signal relay circuit 250B receives the second signal from the second device 220, the second signal relay circuit 250B regenerates the second signal and transmits the second signal to the first device 210.

若第一偵測電路240A偵測到第一裝置210成功地與第二訊號中繼電路250B相連接，且第二偵測電路240B偵測到第二裝置220成功地與第一訊號中繼電路250A相連接，則終端控制電路260導通第一開關270、第二開關275、第三開關280及第四開關285。若第一偵測電路240A偵測到第一裝置210並未成功地與第二訊號中繼電路250B相連接及/或第二偵測電路240B偵測到第二裝置220並未成功地與第一訊號中繼電路250A相連接，則終端控制電路260截止第一開關270、第二開關275、第三開關280及第四開關285。If the first detection circuit 240A detects that the first device 210 is successfully connected to the second signal relay circuit 250B, and the second detection circuit 240B detects that the second device 220 successfully relays the first signal When the circuit 250A is connected, the terminal control circuit 260 turns on the first switch 270, the second switch 275, the third switch 280, and the fourth switch 285. If the first detection circuit 240A detects that the first device 210 is not successfully connected to the second signal relay circuit 250B and/or the second detection circuit 240B detects that the second device 220 is not successfully connected to the When the first signal relay circuit 250A is connected, the terminal control circuit 260 turns off the first switch 270, the second switch 275, the third switch 280, and the fourth switch 285.

第一終端電路230A及第二終端電路230B可為阻抗匹配電路，當終端控制電路260導通第一開關270、第二開關275、第三開關280及第四開關285，第一終端電路230A可降低第一裝置210與第一訊號中繼電路250A的阻抗，也可降低第一裝置210與第二訊號中繼電路250B之間的阻抗，如此即可導通第一裝置210與第一訊號中繼電路250A的電連接，及第一裝置210與第二訊號中繼電路250B的電連接；除此之外，第二終端電路230B可降低第二裝置220與第一訊號中繼電路250A的阻抗，也可降低第二裝置220與第二訊號中繼電路250B之間的阻抗，如此即可導通第二裝置220與第一訊號中繼電路250A的電連接，及第二裝置220與第二訊號中繼電路250B的電連接。此時，終端控制電路260可開啟第一訊號中繼電路250A及第二訊號中繼電路250B，使第一裝置210與第二裝置220呈連線狀態，並可彼此傳輸訊號。The first terminal circuit 230A and the second terminal circuit 230B can be impedance matching circuits. When the terminal control circuit 260 turns on the first switch 270, the second switch 275, the third switch 280, and the fourth switch 285, the first terminal circuit 230A can be lowered The impedance of the first device 210 and the first signal relay circuit 250A can also reduce the impedance between the first device 210 and the second signal relay circuit 250B, so that the first device 210 can be connected to the first signal The electrical connection of the relay circuit 250A, and the electrical connection of the first device 210 and the second signal relay circuit 250B; in addition, the second terminal circuit 230B can reduce the second device 220 and the first signal relay circuit The impedance of 250A can also reduce the impedance between the second device 220 and the second signal relay circuit 250B, so that the electrical connection between the second device 220 and the first signal relay circuit 250A can be conducted, and the second device 220 is electrically connected to the second signal relay circuit 250B. At this time, the terminal control circuit 260 can turn on the first signal relay circuit 250A and the second signal relay circuit 250B, so that the first device 210 and the second device 220 are connected and can transmit signals to each other.

與訊號傳輸系統100類似，訊號傳輸系統200可為通用序列匯流排（Universal Serial Bus, USB），乙太網路（Ethernet）或高畫質多媒體介面（High Definition Multimedia Interface, HDMI）。第一裝置210及第二裝置220皆為訊號收發裝置，例如，通用序列匯流排裝置，乙太網路裝置，高畫質多媒體介面裝置等，並透過第一訊號中繼電路250A及第二訊號中繼電路250B收發訊號。Similar to the signal transmission system 100, the signal transmission system 200 can be a Universal Serial Bus (USB), Ethernet or High Definition Multimedia Interface (HDMI). The first device 210 and the second device 220 are both signal transceiving devices, such as universal serial bus devices, Ethernet devices, high-definition multimedia interface devices, etc., and pass through the first signal relay circuit 250A and the second signal relay circuit 250A. The signal relay circuit 250B sends and receives signals.

第3圖為本發明另一實施例之訊號傳輸系統300的示意圖。訊號傳輸系統300包括第一訊號中繼電路350A，第二訊號中繼電路350B，第一裝置310，第一開關370，第二開關375，第一終端電路330A，第一偵測電路340A，第二裝置320，第三開關380，第四開關385，第二終端電路330B，第二偵測電路340B及終端控制電路360。FIG. 3 is a schematic diagram of a signal transmission system 300 according to another embodiment of the present invention. The signal transmission system 300 includes a first signal relay circuit 350A, a second signal relay circuit 350B, a first device 310, a first switch 370, a second switch 375, a first terminal circuit 330A, and a first detection circuit 340A , The second device 320, the third switch 380, the fourth switch 385, the second terminal circuit 330B, the second detection circuit 340B and the terminal control circuit 360.

訊號傳輸系統300與訊號傳輸系統200的不同之處在於訊號傳輸方向，當第二訊號中繼電路350B接收到由第一裝置310傳來之第一訊號時，第二訊號中繼電路350B會重新產生第一訊號並將第一訊號傳到第二裝置320，及當第一訊號中繼電路350A接收到由第二裝置320傳來之第二訊號時，第一訊號中繼電路350A會重新產生第二訊號並將第二訊號傳到第一裝置310。其餘電路結構與運作方法皆與訊號傳輸系統200相同，在此不贅述。The difference between the signal transmission system 300 and the signal transmission system 200 lies in the signal transmission direction. When the second signal relay circuit 350B receives the first signal from the first device 310, the second signal relay circuit 350B Will regenerate the first signal and transmit the first signal to the second device 320, and when the first signal relay circuit 350A receives the second signal from the second device 320, the first signal relay circuit 350A will regenerate the second signal and transmit the second signal to the first device 310. The rest of the circuit structure and operation method are the same as the signal transmission system 200, and will not be repeated here.

第4圖為本發明另一實施例之訊號傳輸系統400的示意圖。訊號傳輸系統400包括第一訊號中繼電路450A，第二訊號中繼電路450B，第一裝置410，第一開關470，第二開關475，第一終端電路430A，第一偵測電路440A，第二裝置420，第三開關480，第四開關485，第二終端電路430B，第二偵測電路440B及終端控制電路460。FIG. 4 is a schematic diagram of a signal transmission system 400 according to another embodiment of the present invention. The signal transmission system 400 includes a first signal relay circuit 450A, a second signal relay circuit 450B, a first device 410, a first switch 470, a second switch 475, a first terminal circuit 430A, and a first detection circuit 440A , The second device 420, the third switch 480, the fourth switch 485, the second terminal circuit 430B, the second detection circuit 440B and the terminal control circuit 460.

訊號傳輸系統400與訊號傳輸系統200的不同之處在於，第一偵測電路440A另耦接第一裝置410及第一訊號中繼電路450A，用以偵測第一裝置410是否成功地與第一訊號中繼電路450A相連接。第二偵測電路440B另耦接第二裝置420及第二訊號中繼電路450B，用以偵測第二裝置420是否成功地與第二訊號中繼電路450B相連接。若第一偵測電路440A偵測到第一裝置410成功地與第一訊號中繼電路450A相連接及第一裝置410成功地與第二訊號中繼電路450B相連接，且第二偵測電路440B偵測到第二裝置420成功地第一訊號中繼電路450A相連接及第二裝置420成功地第二訊號中繼電路450B相連接，則終端控制電路460導通第一開關470、第二開關475、第三開關480及第四開關485。若第一偵測電路440A偵測到第一裝置410並未成功地與第一訊號中繼電路450A相連接、第一偵測電路440A偵測到第一裝置410並未成功地與第二訊號中繼電路450B相連接、第二偵測電路440B偵測到第二裝置420並未成功地與第一訊號中繼電路450A相連接及/或第二偵測電路440B偵測到第二裝置420並未成功地與第二訊號中繼電路450B相連接，則終端控制電路460截止第一開關470、第二開關475、第三開關480及第四開關485。其餘電路結構與運作方法皆與訊號傳輸系統200相同，在此不贅述。The difference between the signal transmission system 400 and the signal transmission system 200 is that the first detection circuit 440A is additionally coupled to the first device 410 and the first signal relay circuit 450A to detect whether the first device 410 successfully communicates with The first signal relay circuit 450A is connected. The second detection circuit 440B is further coupled to the second device 420 and the second signal relay circuit 450B for detecting whether the second device 420 is successfully connected to the second signal relay circuit 450B. If the first detection circuit 440A detects that the first device 410 is successfully connected to the first signal relay circuit 450A and the first device 410 is successfully connected to the second signal relay circuit 450B, and the second detection circuit When the test circuit 440B detects that the second device 420 is successfully connected to the first signal relay circuit 450A and the second device 420 is successfully connected to the second signal relay circuit 450B, the terminal control circuit 460 turns on the first switch 470 , The second switch 475, the third switch 480 and the fourth switch 485. If the first detection circuit 440A detects that the first device 410 has not successfully connected with the first signal relay circuit 450A, the first detection circuit 440A detects that the first device 410 has not successfully connected with the second signal relay circuit 450A. The signal relay circuit 450B is connected, the second detection circuit 440B detects that the second device 420 is not successfully connected to the first signal relay circuit 450A, and/or the second detection circuit 440B detects the The second device 420 is not successfully connected to the second signal relay circuit 450B, and the terminal control circuit 460 turns off the first switch 470, the second switch 475, the third switch 480, and the fourth switch 485. The rest of the circuit structure and operation method are the same as the signal transmission system 200, and will not be repeated here.

綜上所述，本發明實施例提供一種訊號傳輸系統，只有當第一裝置及第二裝置都與訊號中繼電路連接時，訊號傳輸系統才會開啟訊號中繼電路並進入連線狀態。如此可避免當訊號傳輸系統只有一個裝置連線時即開啟訊號中繼電路，而造成無謂的電力耗損。以上所述僅為本發明之較佳實施例，凡依本發明申請專利範圍所做之均等變化與修飾，皆應屬本發明之涵蓋範圍。 In summary, the embodiment of the present invention provides a signal transmission system. Only when the first device and the second device are connected to the signal relay circuit, the signal transmission system will turn on the signal relay circuit and enter the connection state. . This can prevent the signal relay circuit from being turned on when only one device is connected in the signal transmission system, which will cause unnecessary power consumption. The foregoing descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the scope of the patent application of the present invention should fall within the scope of the present invention.

100,200,300,400:訊號傳輸系統 150,250A,250B,350A,350B 450A,450B:訊號中繼電路 110,210,310,410:第一裝置 120,220,320,420:第二裝置 130A,130B,230A,230B,330A,330B, 430A,430B:終端電路 140A,140B,240A,240B,340A,340B, 440A,440B:偵測電路 160,260,360,460:終端控制電路 170,180,270,275,280,285,370,375,380,385 470,475,480,485:開關100, 200, 300, 400: signal transmission system 150, 250A, 250B, 350A, 350B 450A, 450B: signal relay circuit 110,210,310,410: the first device 120, 220, 320, 420: second device 130A, 130B, 230A, 230B, 330A, 330B, 430A, 430B: terminal circuit 140A, 140B, 240A, 240B, 340A, 340B, 440A, 440B: detection circuit 160, 260, 360, 460: terminal control circuit 170,180,270,275,280,285,370,375,380,385 470,475,480,485: switch

第1圖為本發明實施例之訊號傳輸系統的示意圖。第2圖為本發明另一實施例之訊號傳輸系統的示意圖。第3圖為本發明另一實施例之訊號傳輸系統的示意圖。第4圖為本發明另一實施例之訊號傳輸系統的示意圖。 Figure 1 is a schematic diagram of a signal transmission system according to an embodiment of the present invention. Figure 2 is a schematic diagram of a signal transmission system according to another embodiment of the present invention. FIG. 3 is a schematic diagram of a signal transmission system according to another embodiment of the invention. FIG. 4 is a schematic diagram of a signal transmission system according to another embodiment of the invention.

100:訊號傳輸系統 100: Signal transmission system

150:訊號中繼電路 150: signal relay circuit

110:第一裝置 110: The first device

120:第二裝置 120: second device

130A,130B:終端電路 130A, 130B: terminal circuit

140A,140B:偵測電路 140A, 140B: detection circuit

160:終端控制電路 160: terminal control circuit

170,180:開關 170, 180: switch

Claims

A signal transmission system includes: A signal relay circuit; A first device connected to the signal relay circuit; A first switch, including a first terminal, coupled to the signal relay circuit and the first device, and a second terminal; A first terminal circuit, coupled to the second end of the first switch, for conducting electrical connectivity between the first device and the signal relay circuit when the first switch is turned on; A first detection circuit, coupled to the first device and the signal relay circuit, for detecting whether the first device is successfully connected to the signal relay circuit; A second device connected to the signal relay circuit; A second switch, including a first terminal, coupled to the signal relay circuit and the second device, and a second terminal; A second terminal circuit, coupled to the second end of the second switch, for conducting the electrical connection between the second device and the signal relay circuit when the second switch is turned on; A second detection circuit, coupled to the second device and the signal relay circuit, for detecting whether the second device is successfully connected to the signal relay circuit; and A terminal control circuit, coupled to the first detection circuit, the second detection circuit, the first switch, the second switch, and the signal relay circuit, and is used according to the first detection circuit and the first detection circuit The detection result of the second detection circuit turns on or off the first switch and the second switch, and turns on the signal relay circuit when the first switch and the second switch are turned on; Wherein, if the first device is successfully connected to the signal relay circuit, and the second device is successfully connected to the signal relay circuit, the terminal control circuit turns on the first switch and the second switch switch.

The signal transmission system according to claim 1, wherein if the first detection circuit detects that the first device is not successfully connected to the signal relay circuit and/or the second detection circuit detects When the second device is not successfully connected to the signal relay circuit, the terminal control circuit turns off the first switch and the second switch.

The signal transmission system according to claim 1, wherein the first device and the second device are both signal transceiver devices for transmitting and receiving signals through the signal relay circuit.

The signal transmission system according to claim 1, wherein when the signal relay circuit receives a signal from the first device, the signal relay circuit regenerates the signal and transmits the signal to The second device.

A signal transmission system includes: A first signal relay circuit; A second signal relay circuit; A first device connected to the first signal relay circuit and the second signal relay circuit; A first switch, including a first terminal, coupled to the first signal relay circuit and the first device, and a second terminal; A second switch, including a first terminal, coupled to the second signal relay circuit and the first device, and a second terminal; A first terminal circuit, coupled to the second terminal of the first switch and the second terminal of the second switch, is used to conduct the first device and the second switch when the first switch and the second switch are turned on The electrical connection of the first signal relay circuit, and the electrical connection between the first device and the second signal relay circuit; A first detection circuit, coupled to the first device and the second signal relay circuit, for detecting whether the first device is successfully connected to the second signal relay circuit; A second device connected to the first signal relay circuit and the second signal relay circuit; A third switch, including a first terminal, coupled to the first signal relay circuit and the second device, and a second terminal; A fourth switch, including a first terminal, coupled to the second signal relay circuit and the second device, and a second terminal; A second terminal circuit, coupled to the second terminal of the third switch and the second terminal of the fourth switch, is used to conduct the second device and the fourth switch when the third switch and the fourth switch are turned on The electrical connection of the first signal relay circuit, and the electrical connection between the second device and the second signal relay circuit; A second detection circuit, coupled to the second device and the first signal relay circuit, for detecting whether the second device is successfully connected to the first signal relay circuit; and A terminal control circuit coupled to the first detection circuit, the second detection circuit, the first switch, the second switch, the third switch, the fourth switch, the first signal relay circuit, and The second signal relay circuit is used to turn on or off the first switch, the second switch, the third switch, and the fourth switch according to the detection results of the first detection circuit and the second detection circuit A switch that turns on the first signal relay circuit when the first switch and the third switch are turned on, and turns on the second signal relay circuit when the second switch and the fourth switch are turned on ； Wherein, if the first device is successfully connected to the second signal relay circuit, and the second device is successfully connected to the first signal relay circuit, the terminal control circuit turns on the first switch , The second switch, the third switch and the fourth switch.

The signal transmission system according to claim 5, wherein if the first detection circuit detects that the first device is not successfully connected to the second signal relay circuit and/or the second detection circuit It is detected that the second device is not successfully connected to the first signal relay circuit, and the terminal control circuit turns off the first switch, the second switch, the third switch, and the fourth switch.

A signal transmission system includes: A first signal relay circuit; A second signal relay circuit; A first device connected to the first signal relay circuit and the second signal relay circuit; A first switch, including a first terminal, coupled to the first signal relay circuit and the first device, and a second terminal; A second switch, including a first terminal, coupled to the second signal relay circuit and the first device, and a second terminal; A first terminal circuit, coupled to the second terminal of the first switch and the second terminal of the second switch, is used to conduct the first device and the second switch when the first switch and the second switch are turned on The electrical connection of the first signal relay circuit, and the electrical connection between the first device and the second signal relay circuit; A first detection circuit, coupled to the first device and the first signal relay circuit, is used to detect whether the first device is successfully connected to the first signal relay circuit, and is coupled to the The first device and the second signal relay circuit are used to detect whether the first device is successfully connected to the second signal relay circuit; A second device connected to the first signal relay circuit and the second signal relay circuit; A third switch, including a first terminal, coupled to the first signal relay circuit and the second device, and a second terminal; A fourth switch, including a first terminal, coupled to the second signal relay circuit and the second device, and a second terminal; A second terminal circuit, coupled to the second terminal of the third switch and the second terminal of the fourth switch, is used to conduct the second device and the fourth switch when the third switch and the fourth switch are turned on The electrical connection of the first signal relay circuit, and the electrical connection between the second device and the second signal relay circuit; A second detection circuit, coupled to the second device and the first signal relay circuit, is used to detect whether the second device is successfully connected to the first signal relay circuit, and is coupled to the The second device and the second signal relay circuit are used to detect whether the second device is successfully connected to the second signal relay circuit; and A terminal control circuit coupled to the first detection circuit, the second detection circuit, the first switch, the second switch, the third switch, the fourth switch, the first signal relay circuit, and The second signal relay circuit is used to turn on or off the first switch, the second switch, the third switch, and the fourth switch according to the detection results of the first detection circuit and the second detection circuit A switch that turns on the first signal relay circuit when the first switch and the third switch are turned on, and turns on the second signal relay circuit when the second switch and the fourth switch are turned on ； Wherein, if the first device is successfully connected to the first signal relay circuit and the second signal relay circuit, and the second device is successfully connected to the first signal relay circuit and the second signal relay circuit If the signal relay circuit is connected, the terminal control circuit turns on the first switch, the second switch, the third switch, and the fourth switch.

The signal transmission system according to claim 7, wherein if the first detection circuit detects that the first device is not successfully connected to the first signal relay circuit, the first detection circuit detects Until the first device is not successfully connected to the second signal relay circuit, the second detection circuit detects that the second device is not successfully connected to the first signal relay circuit, and / Or the second detection circuit detects that the second device is not successfully connected to the second signal relay circuit, the terminal control circuit turns off the first switch, the second switch, and the third switch Switch and the fourth switch.

The signal transmission system according to claim 5 or 7, wherein when the first signal relay circuit receives a first signal from the first device, the first signal relay circuit regenerates The first signal and the first signal are transmitted to the second device, and when the second signal relay circuit receives a second signal from the second device, the second signal relay circuit The channel will regenerate the second signal and transmit the second signal to the first device.

The signal transmission system according to claim 5 or 7, wherein when the second signal relay circuit receives a first signal from the first device, the second signal relay circuit regenerates The first signal and transmit the first signal to the second device, and when the first signal relay circuit receives a second signal from the second device, the first signal relay circuit The channel will regenerate the second signal and transmit the second signal to the first device.