Serial bus communication system

Abstract

The invention relates to a serial bus communication system, and relates to the technical field of digital information transmission, and the serial bus communication system comprises an upstream device which is used for transmitting and / or receiving a signal; a downstream device for transmitting and / or receiving signals; the high-speed transceiver is arranged in the upstream device or the downstream device and is used for converting an electric signal and an optical signal; the first circuit is connected with the upstream device and the downstream device and provides power supply voltage for the upstream device and the downstream device, the first circuit can adjust the size of the power supply voltage according to the change of the working temperature, and the numerical value of the working temperature is inversely proportional to the numerical value of the power supply voltage. The adjustment mechanism that the power supply voltage changes along with the temperature is achieved through the first circuit, and the problem that the signal voltage amplitude changes due to the fact that the high-speed transceiver is affected by the temperature is effectively solved. And meanwhile, the error code condition caused by the abnormal signal amplitude is reduced, and the integrity of the transmission signal and the accuracy of logical judgment are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of digital information transmission, and in particular to a serial bus communication system. Background Art

[0002] High-speed transceivers usually exist as the underlying layer of various communication standards, such as the Peripheral Component Interconnect Express standard, the Digital Video Interface standard, the High-Definition Multimedia Interface standard, the SATA (Serial Advanced Technology Attachment) standard, the Universal Serial Bus standard, the HT (HyperTransport) protocol, the XAUI (10-Gigabit Attachment Unit Interface) protocol and the Ethernet protocol.

[0003] In actual cases, the implementation of high-speed transceivers at the bottom layer is independent of the top layer protocol. It is usually an independent IP (Internet Protocol) core and can be divided into two sublayers, the physical coding sublayer and the physical medium connection sublayer. The physical coding sublayer is responsible for encoding and decoding, buffering, channel bonding and clock correction, while the physical medium connection sublayer is responsible for serial-to-parallel conversion, channel equalization, serial data transmission and reception, and data clock extraction.

[0004] Because the physical medium connection sublayer of the high-speed transceiver uses channel equalization technology, it is necessary to fine-tune the signal voltage amplitude to counteract the low-pass characteristics of the actual channel in a pre-distortion manner. Therefore, when the high-speed transceiver operates in a wide temperature range, the driving circuit will be affected by temperature, reducing the ability to adjust the signal voltage amplitude.

[0005] The driving circuit is affected by temperature, which is mainly reflected in the increase of carrier concentration and leakage current as the temperature rises. Because the driving circuit of the high-speed transceiver is usually current-mode differential signaling, it represents the logic state by changing the current flowing through the load resistor. When the carrier concentration increases, the signal voltage amplitude will increase, or when the carrier concentration decreases, the signal voltage amplitude will decrease. Therefore, when the chip is at the extreme temperature, serious bit error problems will occur.

[0006] Therefore, how to propose a method that can avoid the bit error problem caused by the chip working at high or low temperature has become a technical problem that needs to be solved urgently. Summary of the invention

[0007] In view of this, the present invention aims to solve the problem of incomplete transmission signals and logic judgment errors caused by the influence of temperature on the driving circuit in the high-speed transceiver.

[0008] Specifically, the present invention is achieved through the following technical solutions:

[0009] According to a first aspect of the present invention, there is provided a serial bus communication system, comprising: an upstream device for transmitting and / or receiving signals; a downstream device for transmitting and / or receiving signals; a high-speed transceiver, arranged in the upstream device or the downstream device, for converting electrical signals and optical signals; a first circuit, connecting the upstream device and the downstream device, and providing a power supply voltage for the upstream device and the downstream device, the first circuit being capable of adjusting the magnitude of the power supply voltage according to changes in operating temperature, wherein the value of the operating temperature is inversely proportional to the value of the power supply voltage.

[0010] Optionally, in some technical schemes, the first circuit includes: a voltage stabilizing circuit, connected to an upstream device and a downstream device, and providing a power supply voltage for the upstream device and the downstream device, wherein the magnitude of the power supply voltage decreases as the operating temperature increases; a first resistor, connected to the voltage stabilizing circuit, wherein the resistance value of the first resistor increases as the operating temperature increases; wherein the voltage stabilizing circuit controls the magnitude of the power supply voltage according to the change in the resistance value of the first resistor, and the first resistor is a sampling resistor.

[0011] Optionally, in some technical solutions, the serial bus communication system also includes: a second resistor, connected in parallel with the first resistor, and measuring a reference voltage based on the second resistor; wherein the voltage stabilization circuit adjusts the power supply voltage based on the ratio of the reference voltage to the feedback voltage, the feedback voltage is affected by the temperature characteristics of the first resistor, and the power supply voltage can be dynamically adjusted with the operating temperature.

[0012] Optionally, in some technical solutions, the high-speed transceiver includes: a driving circuit connected to a voltage stabilizing circuit for amplifying, converting and processing signals; wherein the voltage stabilizing circuit provides a power supply voltage for the driving circuit.

[0013] Optionally, in some technical solutions, the voltage stabilizing circuit includes a linear voltage stabilizing circuit, and the power supply voltage provided by the linear voltage stabilizing circuit decreases linearly with the increase of the operating temperature. When the resistance value of the first resistor increases, the resistance value of the linear voltage stabilizing circuit decreases linearly and will not decrease beyond the threshold range of the driving circuit.

[0014] Optionally, in some technical solutions, the resistance of the first resistor changes continuously with the change of operating temperature.

[0015] Optionally, in some technical solutions, the voltage stabilizing circuit includes a switching voltage stabilizing circuit, and the power supply voltage provided by the switching voltage stabilizing circuit decreases linearly with the increase of the operating temperature. When the resistance value of the first resistor increases, the resistance value of the switching voltage stabilizing circuit decreases in segments and will not decrease beyond the threshold range of the driving circuit.

[0016] Optionally, in some technical solutions, the resistance of the first resistor changes in stages as the operating temperature changes.

[0017] Optionally, in some technical solutions, the serial bus communication system realizes communication through any one of the DisplayPort standard, HDMI (High-Definition Multimedia Interface) standard, Serial ATA (Advanced Technology Attachment) standard, PCI-E (Peripheral Component Interconnect Express) standard, USB (Universal Serial Bus) standard, Hypertransport protocol, Infiniband protocol, XAUI protocol or Ethernet protocol, and the upstream device and the downstream device communicate bidirectionally or unidirectionally.

[0018] Optionally, in some technical solutions, the upstream device and the downstream device communicate using a differential signaling protocol, the upstream device is used to provide differential signals, and the downstream device is used to receive differential signals, and the differential signaling protocol includes differential short-line series termination logic, differential high-speed transceiver logic, low-voltage differential signaling logic, and differential low-voltage positive-emitter coupling logic.

[0019] The technical solution provided by the present invention brings at least the following beneficial effects:

[0020] The present invention provides a serial bus communication system, wherein an upstream device is used to transmit and / or receive signals, a downstream device is used to transmit and / or receive signals, and a high-speed transceiver is arranged in the upstream device or the downstream device, and is used to convert electrical signals and optical signals. A first circuit connects the upstream device and the downstream device, and provides a power supply voltage for the upstream device and the downstream device. The first circuit can adjust the magnitude of the power supply voltage according to the change of the working temperature. In a low-temperature working environment, the first circuit can adjust the power supply voltage of the high-speed transceiver to increase. In a high-temperature working environment, the first circuit can adjust the power supply voltage of the high-speed transceiver to decrease. The adjustment mechanism of the power supply voltage changing with temperature is realized by the first circuit, which effectively compensates for the problem of signal voltage amplitude change caused by the high-speed transceiver being affected by temperature. At the same time, the bit error caused by abnormal signal amplitude is reduced, the integrity of the transmission signal and the accuracy of logical judgment are improved, thereby improving the stability of the serial bus communication system in a wider temperature range, and ensuring the accuracy and reliability of data transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 A block diagram of a serial bus communication system provided by an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the structure of a first circuit provided by an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of the structure of another first circuit provided by an embodiment of the present invention;

[0026] Figure 4 A block diagram of a high-speed transceiver provided in an embodiment of the present invention;

[0027] Figure 5 A block diagram of another serial bus communication system provided by an embodiment of the present invention.

[0028] Figures 1 to 5 The corresponding relationship between the reference numerals and the component names is as follows:

[0029] 100 serial bus communication system, 110 upstream device, 120 downstream device, 130 high-speed transceiver, 132 driving circuit, 140 first circuit, 142 voltage regulator circuit, 1420 linear voltage regulator circuit, 1422 switching voltage regulator circuit, 144 first resistor, 146 second resistor, 150 channel. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1As shown, an embodiment of the present invention provides a serial bus communication system 100, including: an upstream device 110, used for transmitting and / or receiving signals; a downstream device 120, used for transmitting and / or receiving signals; a high-speed transceiver 130, arranged in the upstream device 110 or the downstream device 120, and used for converting electrical signals and optical signals; a first circuit 140, connecting the upstream device 110 and the downstream device 120, and providing power supply voltage for the upstream device 110 and the downstream device 120, and the first circuit 140 can adjust the magnitude of the power supply voltage according to the change of the operating temperature, wherein the value of the operating temperature is inversely proportional to the value of the power supply voltage.

[0032] The serial bus communication system 100 provided according to the present invention includes an upstream device 110, a downstream device 120, a high-speed transceiver 130, a channel 150 and a first circuit 140. Among them, the upstream device 110 is used to transmit and / or receive signals, the downstream device 120 is used to transmit and / or receive signals, and the high-speed transceiver 130 is arranged in the upstream device 110 or the downstream device 120, and is used to convert electrical signals and optical signals. The high-speed transceiver 130 can convert electrical signals, optical signals or other forms of signals to adapt to data transmission between different media. For example, in an optical fiber communication system, the high-speed transceiver 130 converts electrical signals into optical signals for long-distance transmission. When an electrical signal is input, the parameters such as the intensity, frequency or phase of the light are changed according to the change of the electrical signal, so that the information carried by the electrical signal is loaded onto the optical signal. The first circuit 140 connects the upstream device 110 and the downstream device 120, and provides a power supply voltage for the upstream device 110 and the downstream device 120. The first circuit 140 can adjust the magnitude of the power supply voltage according to the change of the operating temperature, and the value of the operating temperature is inversely proportional to the value of the power supply voltage, and the operating temperature includes the ambient temperature. It can be seen that in a low-temperature working environment, the first circuit 140 can adjust the power supply voltage of the high-speed transceiver 130 to increase, and in a high-temperature working environment, the first circuit 140 can adjust the power supply voltage of the high-speed transceiver 130 to decrease. The adjustment mechanism of the power supply voltage changing with temperature is realized by the first circuit 140, which effectively compensates for the problem of the change of the signal voltage amplitude caused by the temperature of the high-speed transceiver 130. At the same time, when the operating temperature changes, the signal fluctuation caused by the operating temperature of the channel 150 equalization technology of the physical medium connection sublayer of the high-speed transceiver 130 is alleviated, avoiding the error caused by the abnormal signal amplitude, improving the integrity of the transmission signal and the accuracy of the logic judgment, thereby improving the stability of the serial bus communication system 100 in a wider temperature range, and ensuring the accuracy and reliability of data transmission.

[0033] Optionally, in some embodiments, Figure 1As shown, the channel 150 connects the upstream device 110 and the downstream device 120. As a key part connecting the upstream device 110 and the downstream device 120, the channel 150 builds a path for signal transmission, thereby realizing data interaction and communication between the upstream device 110 and the downstream device 120. At the same time, the upstream device 110 and the downstream device 120 can be one-way communication, and the signal is only transmitted in a single direction, for example, the upstream device 110 sends a signal and the downstream device 120 receives the signal, which reduces the complexity of the equipment and the production cost, and can also avoid data errors or loss problems caused by the superposition of two-way signal interference. The upstream device 110 and the downstream device 120 can also be two-way communication. The two-way communication supports real-time data interaction between the upstream device 110 and the downstream device 120, greatly improving the communication efficiency.

[0034] Optionally, in some embodiments, Figure 1 , Figure 2 and Figure 3 As shown, the first circuit 140 includes: a voltage stabilizing circuit 142, which is connected to the upstream device 110 and the downstream device 120 and provides a power supply voltage for the upstream device 110 and the downstream device 120, and the magnitude of the power supply voltage decreases as the operating temperature increases; a first resistor 144, which is connected to the voltage stabilizing circuit 142, and the resistance of the first resistor 144 increases as the operating temperature increases; wherein the voltage stabilizing circuit controls the magnitude of the power supply voltage according to the change in the resistance of the first resistor 144, and the first resistor 144 is a sampling resistor.

[0035] In this embodiment, the first circuit 140 includes a voltage stabilizing circuit 142 and a first resistor 144. The voltage stabilizing circuit 142 is connected to the upstream device 110 and the downstream device 120, and provides a stable power supply voltage for the upstream device 110 and the downstream device 120. The magnitude of the power supply voltage decreases as the operating temperature increases, or the magnitude of the power supply voltage increases as the operating temperature decreases. The first resistor 144 is connected to the voltage stabilizing circuit 142, and the resistance of the first resistor 144 increases as the operating temperature increases. That is, the voltage stabilizing circuit 142 adjusts the power supply voltage according to the temperature variation characteristics of the first resistor 144. The first resistor 144 is used as a sampling resistor, and its resistance increases as the operating temperature increases. In a high temperature environment, the increased resistance prompts the voltage stabilizing circuit 142 to accurately reduce the power supply voltage, thereby offsetting the signal voltage fluctuation caused by the temperature of the driving circuit 132. In a low temperature environment, the reduced resistance value assists the voltage stabilization circuit 142 to appropriately increase the power supply voltage, ensuring that each component of the high-speed transceiver 130 can obtain a stable power supply voltage, so that the serial bus communication system 100 can operate stably within a wider temperature range, thereby improving the overall communication quality and efficiency and reducing the risk of bit errors.

[0036] Optionally, in some embodiments, Figure 2 and Figure 3As shown, the serial bus communication system 100 also includes: a second resistor 146, which is connected in parallel with the first resistor 144, and the reference voltage is measured based on the second resistor 146; wherein the voltage stabilization circuit 142 adjusts the power supply voltage based on the ratio of the reference voltage to the feedback voltage, the feedback voltage is affected by the temperature characteristics of the first resistor 144, and the power supply voltage can be dynamically adjusted with the operating temperature.

[0037] In this embodiment, the serial bus communication system 100 further includes a second resistor 146, which is connected in parallel with the first resistor 144, and the second resistor 146 can accurately measure the reference voltage. The resistance of the first resistor 144 changes with temperature and affects the feedback voltage, and the feedback voltage is a voltage value generated based on the temperature of the first resistor 144. The second resistor 146 provides a reliable reference voltage measurement benchmark for the voltage stabilizing circuit 142 in the parallel circuit through its stable electrical characteristics. In a high temperature environment, when the resistance of the first resistor 144 increases and changes the feedback voltage, the accurate reference voltage provided by the second resistor 146 enables the voltage stabilizing circuit 142 to accurately calculate and adjust the power supply voltage, and accurately adjust the value of the power supply voltage according to the ratio of the feedback voltage to the reference voltage, so as to maintain the stable operation of the high-speed transceiver 130, ensure the accuracy of data transmission, and avoid bit errors caused by voltage fluctuations.

[0038] Optionally, in some embodiments, Figure 4 As shown, the high-speed transceiver 130 includes: a driving circuit 132 connected to a voltage stabilizing circuit 142 for amplifying, converting and processing signals; wherein the voltage stabilizing circuit 142 provides a power supply voltage for the driving circuit 132 .

[0039] In this embodiment, the high-speed transceiver 130 includes a driving circuit 132, which is connected to a voltage stabilizing circuit 142 and amplifies, converts and processes the signal. At the same time, the voltage stabilizing circuit 142 provides a power supply voltage for the driving circuit 132 of the high-speed transceiver 130 to ensure that the driving circuit 132 operates stably under different temperature conditions. The voltage stabilizing circuit 142 can convert the AC power of the mains into a low-voltage DC power suitable for the high-speed transceiver 130 through a series of processes such as rectification, filtering and voltage reduction, thereby playing a voltage stabilizing role.

[0040] Optionally, in some embodiments, Figure 2 As shown, the voltage stabilizing circuit 142 includes a linear voltage stabilizing circuit 1420. The power supply voltage provided by the linear voltage stabilizing circuit 1420 decreases linearly with the increase of the operating temperature. When the resistance of the first resistor 144 increases, the resistance of the linear voltage stabilizing circuit 1420 decreases linearly and will not decrease beyond the threshold range of the driving circuit 132.

[0041] In this embodiment, the voltage stabilizing circuit 142 includes a linear voltage stabilizing circuit 1420. The power supply voltage provided by the linear voltage stabilizing circuit 1420 decreases linearly with the increase of the working temperature. When the resistance value of the first resistor 144 increases, the resistance value of the linear voltage stabilizing circuit 1420 decreases linearly and will not decrease beyond the threshold range of the driving circuit 132, thereby accurately compensating for the change in signal voltage amplitude caused by temperature, reducing the generation of bit errors, and improving the reliability of the high-speed transceiver 130 in a wider temperature range. At the same time, when the resistance value of the first resistor 144 increases and the voltage of the linear voltage stabilizing circuit 1420 decreases linearly, a protection mechanism is provided that does not exceed the threshold of the driving circuit 132, thereby ensuring that the power supply voltage is always within the tolerable range of the driving circuit 132, maintaining the normal function of the driving circuit 132, and avoiding damage to the device or collapse of the serial bus communication system 100 due to voltage fluctuations.

[0042] Optionally, in some embodiments, the resistance of the first resistor 144 changes continuously with the change of the operating temperature.

[0043] In this embodiment, the resistance of the first resistor 144 changes continuously with the operating temperature, providing a continuously changing feedback signal for the voltage stabilizing circuit 142, thereby realizing fine dynamic regulation of the power supply voltage. Compared with the segmented regulation, the continuous variation mode avoids voltage fluctuations caused by resistance mutations in the temperature transition interval, ensuring that the voltage supply of the high-speed transceiver 130 is stable and accurate at each operating point.

[0044] Optionally, in some embodiments, Figure 3 As shown, the voltage stabilizing circuit 142 includes a switching voltage stabilizing circuit 1422. The power supply voltage provided by the switching voltage stabilizing circuit 1422 decreases linearly with the increase of the operating temperature. When the resistance value of the first resistor 144 increases, the resistance value of the switching voltage stabilizing circuit 1422 decreases in stages and will not decrease beyond the threshold range of the driving circuit 132.

[0045] In this embodiment, the voltage stabilizing circuit 142 includes a switching voltage stabilizing circuit 1422, which linearly reduces the power supply voltage as the operating temperature increases, and adjusts in stages according to the increase in the resistance value of the first resistor 144. At the same time, the switching voltage stabilizing circuit 1422 is provided with a protection mechanism that does not exceed the threshold value of the driving circuit 132 during the process in which the resistance value of the first resistor 144 increases and the voltage of the switching voltage stabilizing circuit 1422 is intermittently reduced, thereby ensuring that the power supply voltage is always within the tolerable range of the driving circuit 132, maintaining the normal function of the driving circuit 132, and avoiding damage to the device or collapse of the serial bus communication system 100 due to voltage fluctuations.

[0046] Optionally, in some embodiments, the resistance of the first resistor 144 changes in stages as the operating temperature changes.

[0047] In this embodiment, the resistance of the first resistor 144 varies with temperature, so that the voltage regulator circuit 142 can accurately adjust the power supply voltage according to the characteristics of different temperature zones. Compared with continuously changing resistance, it can more efficiently compensate for temperature effects in a specific temperature zone, thereby improving the performance stability of the high-speed transceiver 130.

[0048] Optionally, in some embodiments, the serial bus communication system 100 implements communication through any one of the DisplayPort (display port) standard, the HDMI (High-Definition Multimedia Interface) standard, the Serial ATA (Advanced Technology Attachment) standard, the PCI-E (Peripheral Component Interconnect Express) standard, the USB (Universal Serial Bus) standard, the Hypertransport (hypertransport technology) protocol, the Infiniband (infinite bandwidth) protocol, the XAUI protocol or the Ethernet protocol, and the upstream device 110 and the downstream device 120 are bidirectional or unidirectional.

[0049] In this embodiment, the serial bus communication system 100 is compatible with multiple standards such as DisplayPort, HDMI, serial SATA, PCI-E, USB, Hypertransport, Infiniband, XAUI and Ethernet. The integration of multiple standards enables the serial bus communication system 100 to be flexibly configured on demand to adapt to complex and diverse device interconnection and communication requirements. At the same time, the serial bus communication system 100 supports both bidirectional communication mode and unidirectional communication mode. Among them, the unidirectional communication mode can simplify the architecture and reduce costs, and the bidirectional communication mode improves the response speed and interaction efficiency, and enhances the user experience and the synergy of the system.

[0050] Optionally, in some embodiments, the upstream device 110 and the downstream device 120 communicate using a differential signaling protocol, the upstream device 110 is used to provide a differential signal, and the downstream device 120 is used to receive a differential signal, and the differential signaling protocol includes differential stub series termination logic, differential high-speed transceiver logic, low-voltage differential signaling logic, and differential low-voltage positive emitter coupling logic.

[0051] In this embodiment, the upstream device 110 and the downstream device 120 communicate according to the differential signaling protocol, the upstream device 110 is used to provide differential signals, and the downstream device 120 is used to receive differential signals. The differential signaling protocol includes differential stub series termination logic, differential high-speed transceiver logic, low-voltage differential signaling logic, and differential low-voltage positive emitter coupling logic. The downstream device 120 decodes the differential signal according to the difference value, effectively weakening the interference of noise on the accuracy of the signal. The serial bus communication system 100 using differential signaling can transmit stably and ensure the integrity of the transmitted data.

[0052] In a specific application, the present invention relates to a power supply voltage control circuit and technology for a high-speed transceiver, which ensures that the voltage of a connected device has a specified voltage change as the operating temperature changes.

[0053] like Figure 5 As shown, the serial bus communication system 100 includes any one of the DisplayPort standard, the HDMI standard, the Serial ATA standard, the PCI E standard, the USB standard, the Hypertransport protocol, the Infiniband protocol, the XAUI protocol, and the Ethernet protocol. The serial bus communication system 100 includes an upstream device 110, a downstream device 120, and a channel 150. The serial bus communication system 100 may be a bidirectional communication system, wherein the upstream device 110 is capable of transmitting and receiving signals, and the downstream device 120 is capable of transmitting and receiving signals.

[0054] Bidirectional implementations of the serial bus communication system 100 may include full-duplex implementations and half-duplex implementations. The serial bus communication system 100 may be a unidirectional communication system, where the upstream device 110 is capable of transmitting signals and the downstream device 120 is capable of receiving signals.

[0055] The communication of the serial bus communication system 100 may use differential or single-ended signaling protocols. For example, the upstream device 110 may include a differential output driver for providing differential signals, and the downstream device 120 may include a differential input driver. The serial bus communication system 100 includes many known differential digital signaling protocols that can be used with the serial bus communication system 100, such as differential stub series termination logic, differential high-speed transceiver logic, low-voltage differential signaling logic, differential low-voltage positive emitter coupled logic, and low-swing differential signaling, as well as other differential digital signaling protocols. In addition, implementations using single-ended serial interface protocols are contemplated, such as low-voltage transistor logic and low-voltage complementary metal oxide semiconductor for PCI (Peripheral Component Interconnect, high-speed peripheral components), as well as other single-ended serial interface protocols.

[0056] like Figure 2As shown, the output voltage of the linear regulator (linear voltage regulator circuit 1420) can be dynamically adjusted according to the operating temperature, wherein the input voltage is represented by Vin, and the output voltage is represented by Vout. The output voltage is used as the power supply voltage of the output IO terminal of the upstream device 110 and the downstream device 120, and can change at a certain rate as the operating temperature changes. Because the output voltage of the linear regulator is adjusted by feedback based on the ratio of the reference voltage to the reference voltage, as long as a sampling resistor (first resistor 144) with a linear temperature change characteristic is used, the output voltage can have the characteristic of decreasing as the temperature increases. It should be clear that the sampling resistor does not necessarily need to be a linear temperature-variable resistor, but can also be a controlled segmented resistor, and the resistance value at different temperatures can be configured by switch gating.

[0057] like Figure 3 As shown, the output voltage of the switching regulator (switching regulator circuit 1422) can be dynamically adjusted according to the operating temperature. Among them, the input voltage is represented by Vin, and the output voltage is represented by Vout. The output voltage is used as the power supply voltage of the output IO terminal of the upstream device 110 and the downstream device 120, and can change at a certain rate as the operating temperature changes. Because the output voltage of the linear regulator is adjusted by feedback based on the ratio of the reference voltage to the reference voltage, as long as a sampling resistor (first resistor 144) with a linear temperature change characteristic is used, the time-limited output voltage has the characteristic of decreasing as the temperature increases. It should be clear that the sampling resistor is not necessarily a linear temperature-variable resistor, but can also be a controlled segmented resistor, and the resistance value at different temperatures can be configured by switch gating.

[0058] It can be seen that in a low-temperature working environment, the power supply voltage of the serial transceiver (high-speed transceiver 130) increases, and in a high-temperature working environment, the power supply voltage of the serial transceiver decreases, which can effectively improve the stability of the serial transceiver link and reduce the possibility of bit errors.

[0059] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0060] The above is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A serial bus communication system (100), characterized in that: include: An upstream device (110) for transmitting and / or receiving a signal; A downstream device (120) for transmitting and / or receiving the signal; A high-speed transceiver (130), disposed in the upstream device (110) or the downstream device (120), for converting electrical signals and optical signals; a first circuit (140) connected to the upstream device (110) and the downstream device (120) and providing a power supply voltage to the upstream device (110) and the downstream device (120), wherein the first circuit (140) is capable of adjusting the magnitude of the power supply voltage according to a change in operating temperature; The value of the operating temperature is inversely proportional to the value of the power supply voltage.

2. The serial bus communication system (100) according to claim 1, characterized in that: The first circuit (140) comprises: A voltage stabilizing circuit (142) connected to the upstream device (110) and the downstream device (120) and providing a power supply voltage to the upstream device (110) and the downstream device (120), wherein the magnitude of the power supply voltage decreases as the operating temperature increases; A first resistor (144) connected to the voltage stabilizing circuit (142), wherein the resistance of the first resistor (144) increases as the operating temperature increases; The voltage stabilizing circuit (142) controls the magnitude of the power supply voltage according to a change in the resistance value of the first resistor (144), and the first resistor (144) is a sampling resistor.

3. The serial bus communication system (100) according to claim 2, characterized in that: The first circuit (140) further includes: a second resistor (146) connected in parallel with the first resistor (144), and measuring a reference voltage according to the second resistor (146); The voltage stabilizing circuit (142) adjusts the power supply voltage according to the ratio of the reference voltage to the feedback voltage, the feedback voltage is affected by the temperature characteristics of the first resistor (144), and the power supply voltage can be dynamically adjusted according to the operating temperature.

4. The serial bus communication system (100) according to claim 2, characterized in that: The high-speed transceiver (130) comprises: A driving circuit (132), connected to the voltage stabilizing circuit (142), for amplifying, converting and processing the signal; Wherein, the voltage stabilizing circuit (142) provides a power supply voltage for the driving circuit (132).

5. The serial bus communication system (100) according to claim 4, characterized in that: The voltage stabilizing circuit (142) comprises a linear voltage stabilizing circuit (1420), wherein the power supply voltage provided by the linear voltage stabilizing circuit (1420) decreases linearly as the operating temperature increases, and when the resistance value of the first resistor (144) increases, the resistance value of the linear voltage stabilizing circuit (1420) decreases linearly and will not decrease beyond a threshold range of the driving circuit (132).

6. The serial bus communication system (100) according to claim 5, characterized in that: The resistance value of the first resistor (144) changes continuously with the change of operating temperature.

7. The serial bus communication system (100) according to claim 4, characterized in that: The voltage stabilizing circuit (142) comprises a switching voltage stabilizing circuit (1422), wherein the power supply voltage provided by the switching voltage stabilizing circuit (1422) decreases linearly as the operating temperature increases, and when the resistance value of the first resistor (144) increases, the resistance value of the switching voltage stabilizing circuit (1422) decreases in stages and will not decrease beyond a threshold range of the driving circuit (132).

8. The serial bus communication system (100) according to claim 7, characterized in that: The resistance value of the first resistor (144) changes in stages as the operating temperature changes.

9. The serial bus communication system (100) according to any one of claims 1 to 7, characterized in that: The serial bus communication system (100) realizes communication through any one of the DisplayPort standard, the HDMI standard, the Serial ATA standard, the PCI-E standard, the USB standard, the Hypertransport protocol, the Infiniband protocol, the XAUI protocol or the Ethernet protocol, and the upstream device (110) and the downstream device (120) are bidirectional or unidirectional communication.

10. The serial bus communication system (100) according to any one of claims 1 to 7, characterized in that: The upstream device (110) and the downstream device (120) communicate using a differential signaling protocol, the upstream device (110) is used to provide a differential signal, and the downstream device (120) is used to receive a differential signal, and the differential signaling protocol includes differential stub series termination logic, differential high-speed transceiver logic, low-voltage differential signaling logic, and differential low-voltage positive emitter coupling logic.

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