Signal transmission device

Abstract

This invention provides a signal transmission device, method, and program that solve the problem of high cost and time required for amplitude adjustment in signal transmission. [Solution] The signal transmission device 100 of the present invention comprises a transmitting unit 101 that simultaneously transmits multiple signals through multiple transmission lines, a receiving unit 102 that receives multiple signals simultaneously transmitted from the transmitting unit, an adjustment unit 103 that performs the same amplitude adjustment for all of the multiple signals simultaneously transmitted from the transmitting unit, and a control unit 104 that controls the adjustment unit so that the transmission and reception of signals between the transmitting unit and the receiving unit are performed with an amplitude larger than the amplitude when all of the multiple signals simultaneously transmitted from the transmitting unit could be received by the receiving unit.

Description

【Technical Field】 【0001】 The present invention relates to a signal transmission device and a signal transmission method. 【Background Art】 【0002】 In broadcasting devices such as televisions and radios and communication devices such as telephones, stable quality is required in the communication of signals between the boards mounted inside. For this reason, it is necessary for each IC (Integrated Circuit) through which the signal passes to input and output the signal at an appropriate amplitude level. For example, when adjusting the signal amplitude, (1) the amplitude adjustment of the signal transmission unit is manually calculated and set using a control IC such as an FPGA (Field Programmable Gate Array) by setting a register or the like, and (2) it is necessary to use a control IC such as an FPGA to check whether the signal can be received at the signal reception unit by setting a register or the like. 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Patent Application Laid-Open No. 2001-53656 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 However, when adjusting the amplitude for a large number of ICs, it is necessary to inspect and adjust the above-described procedures for each IC, which requires a lot of cost and time. Further, as a technique for adjusting the amplitude of a transmission signal, there is a technique of setting the minimum amplitude required for a transmission line as described in Patent Document 1. However, the technique of Patent Document 1 does not describe the adjustment for a plurality of transmission lines, and thus the above-described problem may still occur. 【0005】 Therefore, the object of the present invention is to provide a signal transmission device that can solve the above-mentioned problem of the high cost and time required for amplitude adjustment in signal transmission. [Means for solving the problem] 【0006】 One embodiment of the present invention is a signal transmission device, A transmitting unit that simultaneously transmits multiple signals through multiple transmission lines, A receiving unit that receives multiple signals simultaneously transmitted from the transmitting unit, An adjustment unit that performs the same amplitude adjustment on all of the multiple signals simultaneously transmitted from the aforementioned transmitting unit, A control unit controls the adjustment unit so that the transmission and reception of signals between the transmitting unit and the receiving unit occur with an amplitude greater than the amplitude at which all of the multiple signals simultaneously transmitted from the transmitting unit could be received by the receiving unit, Equipped with, This is the structure it takes. 【0007】 Furthermore, a signal transmission method which is one embodiment of the present invention is A transmitting unit that simultaneously transmits multiple signals through multiple transmission lines, A receiving unit that receives multiple signals simultaneously transmitted from the transmitting unit, A signal transmission method using a signal transmission device comprising an adjustment unit that performs the same amplitude adjustment on all of the multiple signals simultaneously transmitted from the aforementioned transmission unit, The adjustment unit controls the receiving unit so that the transmission and reception of signals between the transmitting unit and the receiving unit occur with an amplitude larger than the amplitude at which all of the multiple signals simultaneously transmitted from the transmitting unit could be received by the receiving unit. This is the structure it takes. [Effects of the Invention] 【0008】 By being configured as described above, the present invention can reduce the cost and time required for amplitude adjustment in signal transmission. [Brief explanation of the drawing] 【0009】 [Figure 1] This is a block diagram showing the configuration of a signal transmission system in Embodiment 1 of the present invention. [Figure 2] This figure shows the signal flow in the signal transmission system disclosed in Figure 1. [Figure 3] Figure 1 is a flowchart showing the operation of the signal transmission system disclosed. [Figure 4] Figure 1 is a flowchart showing the operation of the signal transmission system disclosed. [Figure 5] This is a block diagram showing the configuration of the signal transmission device in Embodiment 2 of the present invention. [Figure 6] This is a flowchart showing the operation of the signal transmission device in Embodiment 2 of the present invention. [Modes for carrying out the invention] 【0010】 <Embodiment 1> A first embodiment of the present invention will be described with reference to Figures 1 to 4. Figure 1 is a diagram illustrating the configuration of a signal transmission system, and Figures 2 to 4 are diagrams illustrating the operation of a signal transmission system. 【0011】 [composition] The signal transmission system in this invention is composed of a signal transmission circuit provided within an electronic circuit board. In particular, the signal transmission system includes a signal adjustment device 1 installed between a transmitting IC (Integrated Circuit) 30 and a receiving IC 40, which adjust the amplitude of the transmitted and received signals. The signal adjustment device 1 adjusts the amplitude in the communication path between the transmitting IC 30 and the receiving IC 40, controlling it to ensure stable communication. The transmitting IC 30 and the receiving IC 40 are devices that transmit and receive general digital signals (data such as video and audio, and signals such as clock signals, such as SDI (Serial Digital Interface) and ASI (Asynchronous Serial Interface)). 【0012】 The signal adjustment device 1 (signal transmission device) includes a transmission board 10 and a reception board 20 as shown in FIG. 1, and these are connected by four transmission lines A, B, C, and D. The transmission board 10 includes a transmission circuit 11 that is a signal output source, an amplitude adjustment circuit 12 that adjusts the amplitude level of the transmitted signal, and a transmission-side control unit 13 that controls the transmission circuit 11 and the amplitude adjustment circuit 12. Further, the reception board 20 includes a reception circuit 21 that receives the signal output from the transmission circuit 11, and a reception-side control unit 23 that controls the reception circuit 21 and feeds back information such as whether the signal can be received to the transmission board 10. Hereinafter, each configuration will be described in detail. 【0013】 The transmission circuit 11 (transmission unit) outputs to simultaneously transmit four signals to the reception circuit 21 via four transmission lines. At this time, all four signals are the same signal. The four signals transmitted by the transmission circuit 11 are, for example, signals transmitted from the transmission IC 10, or signals fed back from the reception-side control unit 23 and the transmission-side control unit 13 as described later. Note that the transmission circuit 11 outputs the four signals transmitted from the transmission IC 10 as they are, or copies one signal into four signals and outputs them. 【0014】 The amplitude adjustment circuit 12 (adjustment unit) performs amplitude adjustment at the same level for all four signals output from the transmission circuit 11. For example, as the amplitude levels, levels 1, 2, 3, 4, 5 (Lv.1, Lv.2, Lv.3, Lv.4, Lv.5) are set, and each time the numerical value of the level increases by one, the voltage is set to increase by 100 mVpp. Then, as described later, the amplitude adjustment circuit 12 adjusts to increase the amplitude of the four transmitted signals according to the level set by the control command from the transmission-side control unit 13. As an example, when receiving a control command to set level 2 for a signal transmitted at level 1 (Lv.1), it adjusts to transmit the signal with the amplitude further increased by 100 mVpp. 【0015】 The receiving circuit 21 (receiver) receives four signals transmitted simultaneously from the transmitting circuit 11. At this time, the receiving circuit 21 notifies the receiving-side control unit 23 of the reception status of the four signals. For example, the receiving circuit 21 notifies the receiving-side control unit 23 whether all of the four signals could be received, the amplitude of each received signal, and the received signal itself. 【0016】 The receiving-side control unit 23 (control unit) detects the reception status of the signals from the receiving circuit 21 and notifies the transmission-side control unit 13 of the result. Specifically, when all of the four signals transmitted simultaneously could be received, the receiving-side control unit 23 notifies the transmission-side control unit 13 that reception was possible. Also, when all of the four signals could not be received, that is, when even one of the four signals transmitted simultaneously could not be received, the receiving-side control unit 23 notifies the transmission-side control unit 13 that reception was impossible. Further, when the amplitudes of the received signals are not equal, the receiving-side control unit 23 selects the signal with the maximum amplitude and notifies the transmission-side control unit 13 of the signal itself. When the amplitudes of the received signals are equal, the receiving-side control unit 23 selects one of the signals and notifies the transmission-side control unit 13 of the signal itself. 【0017】 The transmission-side control unit 13 (control unit) controls the transmission circuit 11 and the amplitude adjustment circuit 12 in response to the notification from the receiving-side control unit 23. Specifically, first, the transmission-side control unit 13 receives a notification, that is, feedback, of one of the signals previously transmitted from the receiving-side control unit 23, and controls the transmission circuit 11 to re-transmit such a signal as four signals. At this time, since the signal with the maximum amplitude among the four signals previously transmitted is fed back, such a signal with the maximum amplitude is re-transmitted as four signals. 【0018】 Furthermore, when the transmitting control unit 13 receives notification from the receiving control unit 23 that it was able to receive the four signals transmitted simultaneously, it commands the amplitude adjustment circuit 12 to raise the amplitude level of the previously transmitted signal by one level. At the same time, it completes the amplitude adjustment and controls the output of subsequent signals at the increased amplitude level. For example, if the previous transmission was at level 1 (Lv.1), and notification of successful reception is received, the unit commands the amplitude level to be raised to level 2 (Lv.2). As a result, the amplitude adjustment circuit 12 raises the amplitude level of the signal that was transmitted at level 1 during the previous transmission to level 2, meaning the amplitude is increased by 100mVpp, and subsequent signals are output. 【0019】 Furthermore, if the transmitting control unit 13 receives notification from the receiving control unit 23 that it was unable to receive any of the four signals transmitted simultaneously, it instructs the amplitude adjustment circuit 12 to raise the amplitude level of the previously transmitted signal by one level. The transmitting control unit 13 then repeats this process until it receives notification from the receiving control unit 23 that it was able to receive the signal, as described above. For example, if the first transmission was at level 1 (Lv.1) and it receives notification that it was not received, it instructs the unit to raise the amplitude level to level 2 (Lv.2), and the second transmission is performed at level 2. If it receives notification that it was also not received for the second transmission, it instructs the unit to raise the amplitude level to level 3 (Lv.3), and the third transmission is performed at level 3. The transmitting control unit 13 then repeats this process until it receives notification that it was able to receive the signal, and up to the set maximum level. 【0020】 [Operation] Next, the operation of the signal transmission system described above will be explained with reference to Figures 2 to 4. Figure 2 is a diagram showing the signal flow in the signal transmission system. Figure 3 is a flowchart showing the operation of the signal adjustment device, and Figure 4 is a flowchart showing the amplitude level transitions. 【0021】 First, as shown by arrow Y1 in Figure 2, a signal is input from the transmitting IC 30 to the transmitting circuit 11. Then, as shown by arrow Y2, four signals are simultaneously transmitted from the transmitting circuit 11 to the receiving circuit 21 as the first transmission (step S1 in Figure 3). At this time, the amplitude of the four signals is adjusted to level 1 (Lv.1) by the amplitude adjustment circuit 12, and they are transmitted to the receiving circuit 21 via four transmission lines A, B, C, and D, as shown by arrow Y3. Level 1 is the level at which the signal is transmitted without increasing its amplitude. However, the amplitude may be increased by a preset value at level 1. 【0022】 Subsequently, as shown by arrow Y4, the signal is received by the receiving circuit 21 (step S2 in Figure 3), and at this time, it is determined whether all four simultaneously transmitted signals can be received (step S3 in Figure 3). If the receiving circuit 21 can receive all four signals (Yes in step S3 in Figure 3), as shown by arrows Y5 and Y6, the receiving control unit 23 feeds back to the transmitting control unit 13 a message indicating that the signals could be received and the signal with the largest amplitude among all the received signals. As a result, the transmitting control unit 13 feeds back the signal with the largest amplitude that was fed back to the transmitting circuit 11 to transmit it (arrow Y7), and further commands the amplitude adjustment circuit 12 to increase the amplitude level by one (arrow Y8) (step S4 in Figure 3). For example, if the first transmission is at level 1 (Lv.1) (step S11 in Figure 4), the amplitude level of subsequent transmissions will be increased to level 2 (Lv.2) and the signal will be transmitted (step S12 in Figure 4), and output to the receiver IC 40 as shown by arrow Y9. As an example, if the signal was transmitted with an amplitude of 100mVpp in the first transmission, it will be output at 200mVpp afterward, with an additional 100mVpp added according to the amplitude level 2. As a result, the signal can be received even with the initial amplitude of 100mVpp, but it is transmitted at 200mVpp to provide a margin. In this way, the amplitude level adjustment is completed. As another example, if the amplitudes of the four signals were transmitted at 100mVpp, 110mVpp, 120mVpp, and 110mVpp in the first transmission, the signal with the maximum amplitude of 120mVpp will be fed back as described above. Therefore, subsequent signal transmission will be performed at 220mVpp, which is the maximum amplitude of 120mVpp increased to level 2, with an additional 100mVpp added. 【0023】 On the other hand, if the receiving circuit 21 is unable to receive any of the four signals (No in step S3 of Figure 3), the receiving control unit 23 feeds back to the transmitting control unit 13 a message indicating that reception was impossible and the signal with the largest amplitude among all the received signals, as shown by arrows Y5 and Y6. As a result, the transmitting control unit 13 feeds back to the transmitting circuit 11 to transmit the signal with the largest amplitude as the second transmission (arrow Y7), and further commands the amplitude adjustment circuit 12 to increase the amplitude level by one level (arrow Y8) (step S5 of Figure 3). For example, if the first transmission is at level 1 (Lv.1) (step S11 of Figure 4), the second transmission will output a signal with an amplitude level increased to level 2 (Lv.2) (arrows Y2, Y3) (step S13 of Figure 4). As an example, a signal that was transmitted with an amplitude of 100mVpp in the first transmission will be output with an amplitude of 200mVpp in the second transmission, with the amplitude increased by 100mVpp according to the amplitude level 2. Furthermore, if, in the first transmission, the amplitudes of the four signals were 100mVpp, 110mVpp, 120mVpp, and 110mVpp respectively, and the 100mVpp signal was unreceivable, then, as described above, the signal with the maximum amplitude of 120mVpp would be fed back. Therefore, the second transmission of the signal would be performed with an amplitude of 220mVpp, achieved by raising the maximum amplitude of 120mVpp to level 2 and adding another 100mVpp. 【0024】 Then, the same process as described above is repeated for the second transmission of the signal. In other words, the receiving circuit 21 receives the second transmission of a signal with an amplitude level of level 2 (Lv.2), and determines whether all four signals transmitted simultaneously can be received (step S13 in Figure 4). If the receiving circuit 21 can receive all four signals, the amplitude level of the subsequent transmission is raised to level 3 (Lv.3), and the signal is transmitted (step S14 in Figure 4) and output to the receiving IC 40. On the other hand, if the receiving circuit 21 cannot receive all four signals, the amplitude level of the third transmission is raised to level 3 (Lv.3), and the signal is transmitted (step S15 in Figure 4). 【0025】 Next, the same process as described above is repeated for the third transmission of the signal. That is, the receiving circuit 21 receives the signal for the third transmission, which has an amplitude level of level 3 (Lv.3), and determines whether all four signals transmitted simultaneously can be received (step S15 in Figure 4). If the receiving circuit 21 can receive all four signals, the amplitude level of the subsequent transmission is raised to level 4 (Lv.4), and the signal is transmitted (step S16 in Figure 4) and output to the receiving IC 40. On the other hand, if the receiving circuit 21 cannot receive all four signals, the amplitude level of the fourth transmission is raised to level 4 (Lv.4), and the signal is transmitted (step S17 in Figure 4). 【0026】 Next, the same process as described above is repeated for the transmission of the fourth signal. That is, the receiving circuit 21 receives the signal for the transmission of the fourth signal with an amplitude level of level 4 (Lv.4), and determines whether all four signals transmitted simultaneously can be received (step S17 in Figure 4). At this time, if the receiving circuit 21 can receive all four signals, the amplitude level of the subsequent transmission is raised to level 5 (Lv.5), and the signal is transmitted (step S18 in Figure 4) and output to the receiving IC 40. On the other hand, if the receiving circuit 21 cannot receive all four signals, the amplitude level of the fifth transmission is raised to level 5 (Lv.5), and the signal is transmitted (step S19 in Figure 4). 【0027】 Next, the same process as described above is repeated for the fifth signal transmission. That is, the receiving circuit 21 receives the fifth signal with an amplitude level of level 5 (Lv.5), and determines whether all four simultaneously transmitted signals can be received (step S19 in Figure 4). If the receiving circuit 21 can receive all four signals, the amplitude level is at its maximum, so subsequent transmissions will continue with an amplitude level of level 5 (Lv.5) and will be output to the receiving IC 40. On the other hand, if the receiving circuit 21 cannot receive all four signals, any further transmissions will fall below the receiving level specification of the receiving IC 40, so the receiving control unit 23 issues an alarm to notify the system. 【0028】 As described above, in this embodiment, the amplitude adjustment of the signal transmitted by the signal adjustment device 1 can be performed automatically, enabling highly reliable signal transmission that meets the specifications of the transmitting and receiving circuits in a short period of time, easily and at low cost. Furthermore, since the receiving circuit has an additional margin added to the amplitude it can receive, it is possible to transmit signals of higher quality. And because the amplitude is adjusted to the minimum amplitude that can be received while including a margin, power consumption can be reduced. 【0029】 In the above example, four identical signals are transmitted simultaneously from the transmission circuit 11, but the number of signals is not necessarily limited to four; any number of signals is acceptable. Furthermore, the four signals are not necessarily limited to being identical, nor are their transmission timings strictly limited to being identical. 【0030】 <Embodiment 2> Next, a second embodiment of the present invention will be described with reference to Figures 5 and 6. Figure 5 is a block diagram showing the configuration of the signal transmission device in Embodiment 2, and Figure 6 is a flowchart showing the operation of the signal transmission device. In this embodiment, the configuration of the signal adjustment device described in the above-described embodiment is shown in general. 【0031】 As shown in Figure 5, the signal transmission device 100 in this embodiment is A transmitting unit 101 that simultaneously transmits multiple signals through multiple transmission lines, A receiving unit 102 that receives multiple signals simultaneously transmitted from the aforementioned transmitting unit, The adjustment unit 103 performs amplitude adjustment to the same level for all of the multiple signals transmitted simultaneously from the aforementioned transmission unit, A control unit 104 controls the adjustment unit so that the transmission and reception of signals between the transmitting unit and the receiving unit occur at an amplitude level greater than the amplitude level at which all of the multiple signals simultaneously transmitted from the transmitting unit could be received by the receiving unit, It is equipped with. 【0032】 Then, as shown in Figure 6, the control unit 104 of the signal transmission device 100 is: The transmitting unit transmits multiple signals simultaneously (step S101), The adjustment unit is controlled so that the transmission and reception of signals between the transmitting and receiving units occur at an amplitude level greater than the amplitude level when all multiple signals are receivable at the receiving unit (step S102). This process is executed. 【0033】 As described above, the present invention enables automatic amplitude adjustment of signals, thereby achieving highly reliable signal transmission in a short time and at low cost. 【0034】 Although the present invention has been described above with reference to the embodiments described above, the present invention is not limited to the embodiments described above. Various modifications to the structure and details of the present invention can be made within the scope of the present invention as can be understood by those skilled in the art. 【0035】 <Note> Some or all of the above embodiments may also be described as follows. The general configuration of the signal transmission device and signal transmission method in the present invention will be described below. However, the present invention is not limited to the following configuration. (Note 1) A transmitting unit that simultaneously transmits multiple signals through multiple transmission lines, A receiving unit that receives multiple signals simultaneously transmitted from the transmitting unit, An adjustment unit that performs the same amplitude adjustment on all of the multiple signals simultaneously transmitted from the aforementioned transmitting unit, A control unit controls the adjustment unit so that the transmission and reception of signals between the transmitting unit and the receiving unit occur with an amplitude greater than the amplitude at which all of the multiple signals simultaneously transmitted from the transmitting unit could be received by the receiving unit, A signal transmission device equipped with the following features. (Note 2) The signal transmission device described in Appendix 1, The control unit controls the adjustment unit to adjust the amplitude to a larger amplitude than the amplitude at which the signal was unreceived if at least one of the multiple signals simultaneously transmitted from the transmitting unit is unreceived by the receiving unit, and then controls the adjustment unit to transmit and receive signals between the transmitting unit and the receiving unit with an amplitude larger than the amplitude at which the signals were receivable if all of the multiple signals simultaneously transmitted from the transmitting unit are receivable by the receiving unit. Signal transmission device. (Note 3) A signal transmission device as described in Appendix 1 or 2, The control unit controls the adjustment unit to adjust the amplitude to a larger amplitude than the amplitude at which the signal was unreceivable, if at least one of the multiple signals simultaneously transmitted from the transmission unit is unreceivable by the receiving unit, and repeats this process until all of the multiple signals simultaneously transmitted from the transmission unit are receivable by the receiving unit, and when all of the multiple signals simultaneously transmitted from the transmission unit are receivable by the receiving unit, controls the adjustment unit to transmit and receive signals between the transmission unit and the receiving unit with an amplitude larger than the amplitude at which the signals were receivable. Signal transmission device. (Note 4) A signal transmission device as described in any of the appendices 1 to 3, The control unit controls the transmitter to output multiple signals simultaneously with the maximum amplitude received by the receiver, if all of the multiple signals transmitted simultaneously from the transmitter are not the same amplitude. Signal transmission device. (Note 5) A signal transmission device as described in any of the appendices 1 to 4, The control unit is capable of receiving all of the multiple signals simultaneously transmitted from the transmitting unit at the receiving unit, and if the multiple signals simultaneously transmitted from the transmitting unit received at the receiving unit do not all have the same amplitude, the control unit controls the adjustment unit so that the transmission and reception of signals between the transmitting unit and the receiving unit are performed with an amplitude even larger than the maximum amplitude received at the receiving unit. Signal transmission device. (Note 6) A signal transmission device as described in any of Appendix 1 to 5, The control unit controls the adjustment unit so that, when the receiving unit is able to receive all of the multiple signals simultaneously transmitted from the transmitting unit, the transmission and reception of signals between the transmitting unit and the receiving unit occurs with an amplitude that is larger by a preset value than the amplitude at which the signals were received. Signal transmission device. (Note 7) A signal transmission device as described in any of the appendices 1 to 6, The control unit controls the adjustment unit to adjust the amplitude to a preset value larger than the amplitude at the time of non-reception if at least one of the multiple signals simultaneously transmitted from the transmission unit is unreceivable by the receiving unit, and repeats this process until all of the multiple signals simultaneously transmitted from the transmission unit become receivable by the receiving unit, and when all of the multiple signals simultaneously transmitted from the transmission unit become receivable by the receiving unit, controls the adjustment unit to transmit and receive signals between the transmission unit and the receiving unit with an amplitude larger than the amplitude at the time of non-reception. Signal transmission device. (Note 8) A signal transmission device as described in any of the appendices 1 to 7, The transmitting unit transmits multiple identical signals simultaneously through multiple transmission paths. Signal transmission device. (Note 9) A transmitting unit that simultaneously transmits multiple signals through multiple transmission lines, A receiving unit that receives multiple signals simultaneously transmitted from the transmitting unit, A signal transmission method using a signal transmission device comprising an adjustment unit that performs the same amplitude adjustment on all of the multiple signals simultaneously transmitted from the aforementioned transmission unit, The adjustment unit controls the receiving unit so that the transmission and reception of signals between the transmitting unit and the receiving unit occur with an amplitude larger than the amplitude at which all of the multiple signals simultaneously transmitted from the transmitting unit could be received by the receiving unit. A method of signal transmission. (Note 10) A transmitting unit that simultaneously transmits multiple signals through multiple transmission lines, A receiving unit that receives multiple signals simultaneously transmitted from the transmitting unit, A control device for controlling a signal transmission device, comprising an adjustment unit that performs the same amplitude adjustment on all of the multiple signals simultaneously transmitted from the transmission unit, The adjustment unit controls the receiving unit so that the transmission and reception of signals between the transmitting unit and the receiving unit occur with an amplitude larger than the amplitude at which all of the multiple signals simultaneously transmitted from the transmitting unit could be received by the receiving unit. Control device. (Note 11) A transmitting unit that simultaneously transmits multiple signals through multiple transmission lines, A receiving unit that receives multiple signals simultaneously transmitted from the transmitting unit, A control device for controlling a signal transmission device, which includes an adjustment unit that performs the same amplitude adjustment on all of the multiple signals simultaneously transmitted from the transmission unit, The adjustment unit controls the receiving unit so that the transmission and reception of signals between the transmitting unit and the receiving unit occur with an amplitude larger than the amplitude at which all of the multiple signals simultaneously transmitted from the transmitting unit could be received by the receiving unit. A program to execute a process. [Explanation of symbols] 【0036】 1 Signal conditioning device 10 Transmitter Board 11. Transmitter Circuit 12 Amplitude adjustment circuit 13 Transmitter-side control unit 20 Receiver board 21 Receiving circuit 23 Receiving side control unit 30 Transmitting ICs 40 Receiving IC 100 Signal transmission device 101 Transmitter 102 Receiving Unit 103 Adjustment section 104 Control Unit

Claims

[Claim 1] A transmitting unit that simultaneously transmits multiple signals through multiple transmission lines, A receiving unit that receives multiple signals simultaneously transmitted from the transmitting unit, An adjustment unit that performs the same amplitude adjustment on all of the multiple signals simultaneously transmitted from the aforementioned transmitting unit, A control unit controls the adjustment unit so that the transmission and reception of signals between the transmitting unit and the receiving unit occur with an amplitude greater than the amplitude at which all of the multiple signals simultaneously transmitted from the transmitting unit could be received by the receiving unit, Equipped with, The control unit controls the transmitter to output multiple signals simultaneously with the maximum amplitude received by the receiver, if all of the multiple signals transmitted simultaneously from the transmitter are not the same amplitude. Signal transmission device. [Claim 2] A transmitting unit that simultaneously transmits multiple signals through multiple transmission lines, A receiving unit that receives multiple signals simultaneously transmitted from the transmitting unit, An adjustment unit that performs the same amplitude adjustment on all of the multiple signals simultaneously transmitted from the aforementioned transmitting unit, A control unit controls the adjustment unit so that the transmission and reception of signals between the transmitting unit and the receiving unit occur with an amplitude greater than the amplitude at which all of the multiple signals simultaneously transmitted from the transmitting unit could be received by the receiving unit, Equipped with, The control unit is capable of receiving all of the multiple signals simultaneously transmitted from the transmitting unit at the receiving unit, and if the multiple signals simultaneously transmitted from the transmitting unit received at the receiving unit do not all have the same amplitude, the control unit controls the adjustment unit so that the transmission and reception of signals between the transmitting unit and the receiving unit are performed with an amplitude even larger than the maximum amplitude received at the receiving unit. Signal transmission device. [Claim 3] A signal transmission device according to claim 1 or 2, The control unit controls the adjustment unit so that, when the receiving unit is able to receive all of the multiple signals simultaneously transmitted from the transmitting unit, the transmission and reception of signals between the transmitting unit and the receiving unit occurs with an amplitude that is larger by a preset value than the amplitude at which the signals were received. Signal transmission device. [Claim 4] A signal transmission device according to any one of claims 1 to 3, The control unit controls the adjustment unit to adjust the amplitude to a value greater than the amplitude at the time of non-reception if at least one of the multiple signals simultaneously transmitted from the transmission unit is unreceivable by the receiving unit, repeating this process until all of the multiple signals simultaneously transmitted from the transmission unit become receivable by the receiving unit, and when all of the multiple signals simultaneously transmitted from the transmission unit become receivable by the receiving unit, the control unit controls the adjustment unit to transmit and receive signals between the transmission unit and the receiving unit with an amplitude greater than the amplitude at the time of non-reception. Signal transmission device. [Claim 5] A signal transmission device according to any one of claims 1 to 4, The transmitting unit transmits multiple identical signals simultaneously through multiple transmission paths. Signal transmission device. [Claim 6] A transmitting unit that simultaneously transmits multiple signals through multiple transmission lines, A receiving unit that receives multiple signals simultaneously transmitted from the transmitting unit, A signal transmission method using a signal transmission device comprising an adjustment unit that performs the same amplitude adjustment on all of the multiple signals simultaneously transmitted from the transmitting unit, The adjustment unit controls the receiving unit to transmit and receive signals between the transmitting unit and the receiving unit with an amplitude greater than the amplitude at which all of the multiple signals simultaneously transmitted from the transmitting unit could be received by the receiving unit, and further controls the transmitting unit to output all of the multiple signals simultaneously with the maximum amplitude received by the receiving unit if all of the multiple signals simultaneously transmitted from the transmitting unit received by the receiving unit do not have the same amplitude. A method of signal transmission. [Claim 7] A transmitting unit that simultaneously transmits multiple signals through multiple transmission lines, A receiving unit that receives multiple signals simultaneously transmitted from the transmitting unit, A signal transmission method using a signal transmission device comprising an adjustment unit that performs the same amplitude adjustment on all of the multiple signals simultaneously transmitted from the transmitting unit, The adjustment unit is controlled so that the transmission and reception of signals between the transmitting unit and the receiving unit occur with an amplitude larger than the amplitude at which all of the multiple signals simultaneously transmitted from the transmitting unit could be received by the receiving unit, and further, when all of the multiple signals simultaneously transmitted from the transmitting unit that the receiving unit receives are not all the same amplitude, the adjustment unit is controlled so that the transmission and reception of signals between the transmitting unit and the receiving unit occur with an amplitude even larger than the maximum amplitude received by the receiving unit. A method of signal transmission. [Claim 8] A transmitting unit that simultaneously transmits multiple signals through multiple transmission lines, A receiving unit that receives multiple signals simultaneously transmitted from the transmitting unit, A control device for controlling a signal transmission device, which includes an adjustment unit that performs the same amplitude adjustment on all of the multiple signals simultaneously transmitted from the transmission unit, The adjustment unit controls the receiving unit to transmit and receive signals between the transmitting unit and the receiving unit with an amplitude greater than the amplitude at which all of the multiple signals simultaneously transmitted from the transmitting unit could be received by the receiving unit, and further controls the transmitting unit to output all of the multiple signals simultaneously with the maximum amplitude received by the receiving unit if all of the multiple signals simultaneously transmitted from the transmitting unit received by the receiving unit do not have the same amplitude. A program to execute a process. [Claim 9] A transmitting unit that simultaneously transmits multiple signals through multiple transmission lines, A receiving unit that receives multiple signals simultaneously transmitted from the transmitting unit, A control device for controlling a signal transmission device, which includes an adjustment unit that performs the same amplitude adjustment on all of the multiple signals simultaneously transmitted from the transmission unit, The adjustment unit is controlled so that the transmission and reception of signals between the transmitting unit and the receiving unit occur with an amplitude larger than the amplitude at which all of the multiple signals simultaneously transmitted from the transmitting unit could be received by the receiving unit, and further, when all of the multiple signals simultaneously transmitted from the transmitting unit that the receiving unit receives are not all the same amplitude, the adjustment unit is controlled so that the transmission and reception of signals between the transmitting unit and the receiving unit occur with an amplitude even larger than the maximum amplitude received by the receiving unit. A program to execute a process.

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