TWM662445U - Redriver - Google Patents

Abstract

The present invention provides a redriver. The redriver includes an equalizer, an auxiliary channel detector and a control circuit. The equalizer improves the signal quality of the main channel of a signal transmission system. The auxiliary channel detector detects level toggling of the auxiliary channel of the signal transmission system. When the auxiliary channel detection result indicating that the auxiliary channel is at a disconnected level, the control circuit controls the equalizer to enter a disconnection phase to save power. When the auxiliary channel detection result indicating that the auxiliary channel changes from the disconnected level to a connected level and a command form toggling event occurs, the control circuit controls the equalizer to enter a connected phase from the disconnection phase, wherein the equalizer is turned on in the connected phase.

Description

Adapter drive

The novel invention relates to a signal transmission system, and in particular to a redriver.

When high-speed signals pass through transmission paths such as cables or printed circuit boards, the signal attenuation is very serious. Generally speaking, the longer the signal transmission distance, the more serious the signal attenuation (that is, the worse the signal quality), which makes it difficult for the receiver at a distance to restore the transmitted signal. A retimer can be used as a repeater in the transmission path. The retimer can decode the transmission signal from the signal source device to obtain decoded data, and then re-encode the decoded data to generate a transmission signal with good signal quality to the signal destination device. Therefore, many high-speed signal transmission system specifications use retimers to improve the signal quality of high-speed signal transmission systems. For example, based on the Universal Serial Bus (USB) specification, a retimer is used in a USB host, USB cable or USB device to improve the signal quality of the RX2 channel, TX2 channel, TX1 channel and RX1 channel. However, how to reduce the cost of the repeater is one of the many technical issues in this field.

The novel invention provides a redriver to improve the signal quality of the main channel of the signal transmission system.

In one embodiment of the present invention, the above-mentioned adapter driver includes a plurality of equalizers, at least one auxiliary channel detector and a control circuit. These equalizers are used to respectively enhance the signal quality of different main channels of the signal transmission system. The auxiliary channel detector is used to detect the level switching of at least one auxiliary channel of the signal transmission system. The control circuit is coupled to the auxiliary channel detector to receive the auxiliary channel detection result. The control circuit is also coupled to these equalizers. In response to the auxiliary channel detection result indicating that the auxiliary channels are all at an unconnected level, the control circuit controls these equalizers to enter a disconnection stage, wherein these equalizers are turned off in the disconnection stage to save power. In response to the auxiliary channel detection result indicating that the auxiliary channel changes from an unconnected level to a connected level and a command form toggling event occurs in the auxiliary channel, the control circuit controls the equalizers to enter a connected stage from a disconnected stage, wherein the equalizers are turned on in the connected stage.

Based on the above, the auxiliary channel detector described in various embodiments of the present invention detects the level switching of the auxiliary channel of the signal transmission system. When the auxiliary channel changes from an unconnected level to a connected level (e.g., from a low level to a high level) and a command-type switching event occurs (e.g., frequent level switching occurs), the equalizer enters the connection stage (is enabled). The enabled equalizer can improve the signal quality of the main channel of the signal transmission system. When the auxiliary channel is at an unconnected level and reaches a threshold time (e.g., remains at a low level), the equalizer enters the disconnection stage (is turned off) to save power.

In order to make the above features and advantages of the present invention more clearly understood, an embodiment is given below and described in detail with reference to the accompanying drawings.

The term "coupled (or connected)" used in the entire specification of this case (including the scope of the patent application) may refer to any direct or indirect means of connection. For example, if the text describes a first device coupled (or connected) to a second device, it should be interpreted that the first device can be directly connected to the second device, or the first device can be indirectly connected to the second device through other devices or some connection means. The terms "first", "second", etc. mentioned in the entire specification of this case (including the scope of the patent application) are used to name the elements or distinguish different embodiments or scopes, and are not used to limit the upper or lower limit of the number of elements, nor to limit the order of elements. In addition, wherever possible, elements/components/steps with the same numbers in the drawings and embodiments represent the same or similar parts. Elements/components/steps using the same reference numerals or the same terms in different embodiments may refer to each other for related descriptions.

FIG1 is a circuit block diagram of a signal transmission system of the present invention. The signal transmission system 100 of FIG1 includes a host 110, a cable 120 and a device 130. The cable 120 is connected between the host 110 and the device 130. The host 110 and the device 130 communicate with each other through the cable 120. For example, the host 110 and the device 130 negotiate the system configuration with each other through the auxiliary channel C11. Then, the host 110 and the device 130 transmit data signals to each other through the main channel C12. The main channel C12 is, for example, a main transmission channel. The signal transmission system 100 of the present invention can be a USB3, USB4, Thunderbolt, DisplayPort, HDMI, PCIe transmission system or other high-speed signal transmission system. Taking the USB4 transmission system as an example, the host 110 is a USB host, the cable 120 is a USB cable, the device 130 is a USB device, the auxiliary channel C11 includes a sideband channel (such as SBTX and SBRX) that complies with the USB4 specification, and the main channel C12 includes RX2, TX2, TX1 and RX1 channels that comply with the USB4 specification.

This embodiment uses a redriver in the transmission path between the controller 111 of the host 110 and the controller 131 of the device 130 as a repeater in the signal transmission system 100. Unlike a retimer, the redriver does not have the ability to decode the transmission signal from the controller 111, and is unaware of the operation negotiation content between the controller 111 and the controller 131. FIG. 1 shows four setting positions of the redriver in the signal transmission system 100. Among them, the setting position and number of the redriver can be determined according to the actual design. The redriver can regenerate the signal to improve the high-speed signal quality of the signal transmission system 100. For example, the adapter driver can be used in a USB host, USB cable or USB device to improve the signal quality of the RX2, TX2, TX1 and RX1 channels.

FIG. 2 is a circuit block diagram of a switching driver of an embodiment of the present invention. The switching driver 200 shown in FIG. 2 can be used as one of many implementation examples of any switching driver shown in FIG. 1 . The switching driver 200 is, for example, a high-speed signal switching driver, which includes a plurality of equalizers 210, at least one main channel detector 220, at least one auxiliary channel detector 230, and a control circuit 240. According to different designs, the control circuit 240 can be implemented as a hardware circuit or a combination of hardware, firmware, and software (i.e., program).

In hardware form, the control circuit 240 can be implemented as a logic circuit on an integrated circuit. For example, the relevant functions of the control circuit 240 can be implemented in various logic blocks, modules and circuits in one or more hardware controllers, microcontrollers, hardware processors, microprocessors, application-specific integrated circuits (ASICs), digital signal processors (DSPs), field programmable gate arrays (FPGAs), central processing units (CPUs) and/or other processing units. The relevant functions of the control circuit 240 can be implemented as hardware circuits, such as various logic blocks, modules and circuits in an integrated circuit, using hardware description languages (such as Verilog HDL or VHDL) or other suitable programming languages.

In software form and/or firmware form, the relevant functions of the control circuit 240 can be implemented as programming codes. For example, the control circuit 240 is implemented using general programming languages (such as C, C++ or assembly language) or other suitable programming languages. The programming codes can be recorded/stored in a "non-transitory machine-readable storage medium". In some embodiments, the non-transitory machine-readable storage medium includes, for example, a semiconductor memory and/or a storage device. The storage device includes a hard disk drive (HDD), a solid-state drive (SSD) or other storage devices. An electronic device (such as a CPU, a hardware controller, a microcontroller, a hardware processor or a microprocessor) can read and execute the programming code from the non-temporary machine-readable storage medium to implement the relevant functions of the control circuit 240.

As mentioned above, the control circuit 240 is coupled to these equalizers 210, and these equalizers 210 are used to respectively enhance the signal quality of different main channels C22 (e.g., the main channel C12 shown in FIG. 1 ) of the signal transmission system 100. The main channel detector 220 and the auxiliary channel detector 230 are toggle detectors. The auxiliary channel detector 230 is used to detect the level switching of the auxiliary channel C21 (e.g., the auxiliary channel C11 shown in FIG. 1 ) of the signal transmission system 100. The control circuit 240 is coupled to the auxiliary channel detector 230 to receive the auxiliary channel detection result.

Here, the operation method of the adapter driver is described. FIG3 is an operation flow chart of the adapter driver of an embodiment of the present invention. First, please refer to FIG1, FIG2 and FIG3, at least one auxiliary channel detector of the adapter driver detects the level switching of at least one auxiliary channel of the signal transmission system. That is, as shown in step S310, the auxiliary channel detector 230 detects the level switching of the auxiliary channel of the signal transmission system 100. When the auxiliary channel detection result of the auxiliary channel detector 230 indicates that the auxiliary channels of the signal transmission system 100 are all at the disconnection level and, for example, reach a threshold time (for example, maintain at a low level), that is, the judgment result of step S320 is "the auxiliary channels are at the disconnection level", the control circuit 240 performs step S330 to control the equalizer 210 to enter the disconnection phase. The equalizer 210 is turned off in the disconnection phase to save power (step S340). Specifically, in the present invention, in response to the auxiliary channel detection result of the at least one auxiliary channel detector indicating that the at least one auxiliary channel is at an unconnected level, the equalizer of the adapter driver can be controlled to enter a disconnection phase to shut down, thereby putting the adapter driver into a power saving mode.

When the auxiliary channel detection result indicates that the at least one auxiliary channel of the signal transmission system 100 changes from an unconnected level to a connected level (e.g., from a low level to a high level), and a command form toggling event occurs in the at least one auxiliary channel (e.g., the auxiliary channel frequently switches levels), that is, the judgment result of step S320 is "the auxiliary channel changes to a connected level and a command form toggling event occurs", the adapter driver is controlled to enter the operating mode. The control circuit 240 performs step S350 to control the equalizer 210 to enter the connected phase from the disconnected phase. The equalizer 210 is turned on in the connected phase to enter the operating mode. Therefore, the equalizers 210 can respectively improve the signal quality of different main channels of the signal transmission system 100 (step S360).

In summary, the auxiliary channel detector 230 detects the level switching of the auxiliary channel of the signal transmission system 100. When the auxiliary channel changes from the unconnected level to the connected level (e.g., from a low level to a high level) and a command-type switching event occurs (e.g., frequent level switching occurs), the equalizer 210 enters the connected phase (is enabled). The enabled equalizer 210 can improve the signal quality of the main channel of the signal transmission system 100. When the auxiliary channel is at the unconnected level and reaches the threshold time (e.g., remains at a low level), the equalizer 210 enters the disconnected phase (is turned off) to save power.

FIG4 is a schematic diagram of the operation phase of the adapter driver of an embodiment of the present invention. Referring to FIG2 and FIG4, when the auxiliary channel detection result indicates that the auxiliary channels are all at the unconnected level, the equalizer 210 is in the disconnection phase P410 (the equalizer 210 is turned off). When a connection event (Connect_event) occurs, the equalizer 210 enters the connection phase P420 (the equalizer 210 is enabled) from the disconnection phase P410. The conditions for establishing the connection event include, for example: the auxiliary channel changes from the unconnected level to the connected level (for example, from a low level to a high level), and the auxiliary channel has a command-type switching event (for example, frequent level switching occurs). The connection phase P420 includes an active phase P421 and a sleep phase P422. In response to the establishment of the connection event, the control circuit 240 controls the equalizer 210 to enter the active phase P421 from the disconnection phase P410. In the active phase P421, the equalizer 210 is fully turned on to improve the signal quality of different main channels.

Referring to FIG. 1 , FIG. 2 and FIG. 4 , each main channel detector 220 detects the level switching of different main channels of the signal transmission system 100 . The control circuit 240 is coupled to the main channel detector 220 to receive each main channel detection result. In response to the auxiliary channel detection result and the main channel detection result indicating that an idle event (Idle_event) occurs in a target channel group (target lane) in the main channel, the control circuit 240 controls at least one corresponding equalizer corresponding to the target channel group in the equalizers 210 to enter the sleep phase P422 from the active phase P421. In the sleep phase P422, the at least one corresponding equalizer is fully turned off to save power. The establishment conditions of the idle event include, for example: the auxiliary channel detection result indicates that the auxiliary channel is in a connected state, and the main channel detection result indicates that the target channel group has no level switching.

In response to the auxiliary channel detection result and the main channel detection result indicating the occurrence of a wake-up event (Wake_event), the control circuit 240 controls all of the equalizers 210 to return from the sleep phase P422 to the active phase P421. The conditions for the establishment of the wake-up event include, for example: the auxiliary channel detection result indicates that the auxiliary channel is in a connected state, and a command-type switching event occurs in the auxiliary channel, or the main channel detection result indicates that a level switching occurs in the target channel group.

In response to the auxiliary channel detection result indicating the occurrence of a disconnect event (Disconnect_event), the control circuit 240 controls all of the equalizers 210 to return from the connection stage P420 to the disconnection stage P410. The establishment condition of the disconnection event includes, for example: the auxiliary channel changes from the connected level to the unconnected level and reaches a certain threshold time. The threshold time can be determined according to the actual design.

FIG5 is a schematic diagram of a circuit block of an equalizer, a main channel detector, and an auxiliary channel detector in a USB4 application scenario, as shown in an embodiment of the present invention. The equalizer 210, the main channel detector 220, and the auxiliary channel detector 230 shown in FIG5 can be one of many embodiments of the equalizer 210, the main channel detector 220, and the auxiliary channel detector 230 shown in FIG2. In the embodiment of FIG5, the main channel C52 of the signal transmission system (such as the main channel C12 shown in FIG1) includes channels RX2, TX2, TX1, and RX1 that comply with the USB4 specification, and the auxiliary channel C51 of the signal transmission system (such as the auxiliary channel C11 shown in FIG1) includes sideband channels SBTX and SBRX that comply with the USB4 specification. The channels TX1 and RX1 form a channel group (lane) LANE0, and the channels RX2 and TX2 form a channel group LANE1. The equalizer 210 includes equalizers EQ51, EQ52, EQ53 and EQ54, which are used to improve the signal quality of the channels RX2, TX2, TX1 and RX1 respectively. The main channel detector 220 includes toggle detectors 221, 222, 223 and 224, which are used to detect the level switching of the channels RX2, TX2, TX1 and RX1 respectively, and then provide the main channel detection result to the control circuit 240. The auxiliary channel detector 230 includes switching detectors 231 and 232 for respectively detecting the level switching of the sideband channels SBTX and SBRX, and then providing the auxiliary channel detection result to the control circuit 240.

When the auxiliary channel detection results of the switching detectors 231-232 indicate that the sideband channels SBTX and SBRX are both maintained at a low level, the control circuit 240 turns off the equalizers EQ51, EQ52, EQ53 and EQ54 (disconnection phase P410). When a connection event occurs, the control circuit 240 activates the equalizers EQ51-EQ54 (entering the active phase P421 from the disconnection phase P410). When the auxiliary channel detection results of the switching detectors 231-232 and the main channel detection results of the switching detectors 221-224 indicate that an idle event occurs in a certain target channel group (for example, the channel group LANE1), the control circuit 240 controls the equalizers EQ51-EQ52 corresponding to the channel group LANE1 to enter the sleep stage P422 from the active stage P421. At this time, assuming that the channel group LANE0 does not have an idle event, the equalizers EQ53-EQ54 corresponding to the channel group LANE0 can be maintained in the active stage P421. In the sleep stage P422, the corresponding equalizers EQ51-EQ52 are all turned off to save power. When the auxiliary channel detection results of the switching detectors 231-232 and the main channel detection results of the switching detectors 221-224 indicate that a wake-up event occurs in any channel, the control circuit 240 controls all the equalizers EQ51-EQ54 to return from the sleep phase P422 to the active phase P421.

FIG6 is a schematic diagram of the operation phase of the adapter driver of another embodiment of the present invention. The disconnection phase P410, connection event, connection phase P420 and disconnection event shown in FIG6 can correspond to the relevant description of FIG4, and no further description is given. In the embodiment of FIG6, the connection phase P420 includes an active phase P421, a standby phase (standby phase) P423 and a sleep phase P422. The active phase P421, idle event, sleep phase P422 and wake-up event shown in FIG6 can correspond to the relevant description of FIG4, and no further description is given.

2 and 6 , in response to the auxiliary channel detection result and the main channel detection result indicating that an idle event occurs in a target lane in the main channel, the control circuit 240 controls at least one corresponding equalizer corresponding to the target lane in the equalizers 210 to enter the standby phase P423 from the active phase P421. In the standby phase P423, the at least one corresponding equalizer is half-closed to save power. In response to the auxiliary channel detection result and the main channel detection result indicating that the target channel group in the main channel has a sleep event (Sleep_event), the control circuit 240 controls the at least one corresponding equalizer corresponding to the target channel group in these equalizers 210 to enter the sleep stage P422 from the standby stage P423. In the sleep stage P422, the at least one corresponding equalizer is fully turned off to further save power. The conditions for the establishment of the sleep event include, for example: the auxiliary channel detection result indicates that the at least one auxiliary channel is in a connected state, and the main channel detection result indicates that the target channel group has no level switching and reaches a certain threshold time. The threshold time can be determined according to the actual design. In response to the auxiliary channel detection result and the main channel detection result indicating the occurrence of a wake-up event, the control circuit 240 controls all of the equalizers 210 to return from the sleep phase P422 to the active phase P421.

FIG7 is a circuit block diagram of a switching driver of another embodiment of the present invention. The switching driver 700 of FIG7 can be used as one of the embodiments of any switching driver shown in FIG1, and includes a plurality of equalizers 710, a plurality of high-speed switching detectors 720 for detecting high-frequency switching of different main channels of the signal transmission system 100 (detecting high-frequency components of the channels), a plurality of low-speed switching detectors 730 for detecting low-frequency switching of different main channels of the signal transmission system 100 (detecting low-frequency components of the channels), at least one auxiliary channel detector 740, and a control circuit 750 coupled to the equalizers 710. The control circuit 750 is coupled to the high-speed switching detector 720 and the low-speed switching detector 730, and receives multiple high-frequency and low-frequency switching detection results of different main channels. The switching driver 700 can also execute the operation method shown in Figure 3. The equalizer 710, the auxiliary channel detector 740 and the control circuit 750 can refer to the relevant description of the corresponding components shown in Figure 2 and be deduced by analogy, and no further description is given. The equalizer 710 and the auxiliary channel detector 740 shown in Figure 7 can also refer to the relevant description of the corresponding components shown in Figure 5, and the high/low speed switching detector 720/730 can refer to the relevant description of the main channel detector 220 in Figure 5, and no further description is given.

In summary, the auxiliary channel detector 740 detects the level switching of the auxiliary channel of the signal transmission system 100. When the auxiliary channel changes from the unconnected level to the connected level (e.g., from a low level to a high level) and a command-type switching event occurs (e.g., frequent level switching occurs), the equalizer 710 enters the connected phase (is enabled). The enabled equalizer 710 can improve the signal quality of the main channel of the signal transmission system 100. When the auxiliary channel is at the unconnected level and reaches the threshold time (e.g., remains at a low level), the equalizer 710 enters the disconnected phase (is turned off) to save power.

4 and 7, when the auxiliary channel detection result of the auxiliary channel detector 740 indicates that a connection event occurs, that is, in response to the auxiliary channel changing from an unconnected level to a connected level and a command-type switching event occurring in the auxiliary channel, the control circuit 750 controls the equalizer 710 to enter the active stage P421 from the disconnected stage P410. In the active stage P421, the equalizer 710 is fully turned on to improve the signal quality of different main channels. In response to the auxiliary channel detection result and the high/low frequency switching detection result indicating that an idle event occurs in a target channel group (target lane) in the different main channels, the control circuit 750 controls at least one corresponding equalizer corresponding to the target channel group in the equalizers 710 to enter the sleep phase P422 from the active phase P421, thereby turning off the at least one corresponding equalizer to save power. The establishment conditions of the idle event include, for example: the auxiliary channel detection result indicates that the auxiliary channel is connected, and the high/low frequency switching detection result indicates that the target channel group has no high/low frequency switching.

In response to the auxiliary channel detection result and the high/low frequency switching detection result indicating the occurrence of a wake-up event, the control circuit 750 controls all of the equalizers 710 to return from the sleep phase P422 to the active phase P421. The conditions for the establishment of the wake-up event include, for example: the auxiliary channel detection result indicates that the auxiliary channel is in a connected state and a command-type switching event occurs, or the high frequency switching detection result indicates that the target channel group has a high frequency switching, or the low frequency switching detection result indicates that the target channel group has a low frequency switching.

6 and 7 , when the auxiliary channel detection result of the auxiliary channel detector 740 indicates that a connection event occurs, that is, in response to the auxiliary channel changing from an unconnected level to a connected level and a command-type switching event occurring in the auxiliary channel, the control circuit 750 controls the equalizer 710 to enter the active stage P421 from the disconnected stage P410. In response to the auxiliary channel detection result of the auxiliary channel detector 740 and the high/low frequency switching detection result indicating that an idle event occurs in a target channel group (target lane) in the different main channels, the control circuit 750 controls at least one corresponding equalizer corresponding to the target channel group in the equalizers 710 to enter the standby stage P423 from the active stage P421, so that the corresponding equalizer is half-closed to save power. The establishment conditions of the idle event include, for example: the auxiliary channel detection result indicates that the auxiliary channel is connected, and the high/low frequency switching detection result indicates that the target channel group has no high/low frequency switching.

In response to the auxiliary channel detection result and the high/low frequency switching detection result indicating that the target channel group has a sleep event, the control circuit 750 controls the at least one corresponding equalizer corresponding to the target channel group to enter the sleep stage P422 from the standby stage P423, so that the at least one corresponding equalizer is fully turned off to further save power. The conditions for the establishment of the sleep event include, for example: the auxiliary channel detection result indicates that the at least one auxiliary channel is in a connected state, the high frequency switching detection result indicates that the target channel group has no high frequency switching and reaches a first threshold duration, and the low frequency switching detection result indicates that the target channel group has no low frequency switching and reaches a second threshold duration. The first/second threshold duration may be determined according to actual design.

In response to the auxiliary channel detection result and the high/low frequency switching detection result indicating the occurrence of a wake-up event, the control circuit 750 controls the equalizer 710 to return to the active stage P421. The establishment conditions of the wake-up event include, for example: the auxiliary channel detection result indicates that the auxiliary channel is in a connected state and the command-type switching event occurs, or the high frequency switching detection result indicates that the target channel group has a high frequency switching, or the low frequency switching detection result indicates that the target channel group has a low frequency switching.

Although the novel creation has been disclosed as above by way of embodiments, they are not intended to limit the novel creation. Any person with ordinary knowledge in the relevant technical field may make slight changes and modifications without departing from the spirit and scope of the novel creation. Therefore, the protection scope of the novel creation shall be subject to the scope defined in the attached patent application.

100: Signal transmission system 110: Main unit 111, 131: Controller 120: Cable 130: Device 200, 700: Adapter driver 210, 710, EQ51, EQ52, EQ53, EQ54: Equalizer 220: Main channel detector 221, 222, 223, 224, 231, 232: Switching detector 230, 740: Auxiliary channel detector 240, 750: Control circuit 720: High-speed switching detector 730: Low-speed switching detector C11, C21, C51: Auxiliary channel C12, C22, C52: Main channel LANE0, LANE1: channel group P410: disconnection phase P420: connection phase P421: activity phase P422: sleep phase P423: standby phase RX1, RX2, TX1, TX2: channels S310~S360: steps SBTX and SBRX: sideband channels

FIG1 is a circuit block diagram of a signal transmission system of the present invention. FIG2 is a circuit block diagram of an adapter driver of an embodiment of the present invention. FIG3 is an operation flow chart of an adapter driver of an embodiment of the present invention. FIG4 is a schematic diagram of the operation phase of an adapter driver of an embodiment of the present invention. FIG5 is a circuit block diagram of an equalizer, a main channel detector, and an auxiliary channel detector in a USB4 application scenario, as shown in an embodiment of the present invention. FIG6 is a schematic diagram of the operation phase of an adapter driver of another embodiment of the present invention. FIG7 is a circuit block diagram of an adapter driver of another embodiment of the present invention.

700: Adapter drive

710:Equalizer

720: High-speed switching detector

730: Low-speed switching detector

740: Auxiliary channel detector

750: Control circuit

Claims (12)

A switching driver includes: a plurality of equalizers for respectively improving the signal quality of different main channels of a signal transmission system; at least one auxiliary channel detector for detecting the level switching of at least one auxiliary channel of the signal transmission system; and a control circuit coupled to the at least one auxiliary channel detector to receive an auxiliary channel detection result, and coupled to the equalizers, wherein, in response to the auxiliary channel detection result indicating that the at least one auxiliary channel is at an unconnected level, the control circuit controls the equalizers to enter a disconnection stage, wherein the equalizers are turned off in the disconnection stage to save power; and In response to the auxiliary channel detection result indicating that the at least one auxiliary channel changes from the unconnected level to a connected level and a command-type switching event occurs in the at least one auxiliary channel, the control circuit controls the equalizers to enter a connected stage from the disconnected stage, wherein the equalizers are enabled in the connected stage. A converter drive as described in claim 1, wherein the signal transmission system includes a USB3, USB4, Thunderbolt, DisplayPort, HDMI or PCIe transmission system, and the at least one auxiliary channel includes a sideband channel that complies with the USB4 specification, and the different main channels include RX2, TX2, TX1 and RX1 channels that comply with the USB4 specification. The switching driver as claimed in claim 1, wherein, in response to the auxiliary channel detection result indicating that the at least one auxiliary channel changes from the connected level to the unconnected level and reaches a threshold time, the control circuit controls the equalizers to return from the connected stage to the disconnected stage. The adapter driver as described in claim 1, wherein the connection phase includes an active phase and a sleep phase, and the adapter driver further includes: A plurality of main channel detectors for respectively detecting the level switching of the different main channels of the signal transmission system, wherein, The control circuit is coupled to the main channel detectors to receive a plurality of main channel detection results; In response to the auxiliary channel detection result indicating that the at least one auxiliary channel changes from the unconnected level to the connected level and the command-type switching event occurs in the at least one auxiliary channel, the control circuit controls the equalizers to enter the active phase from the disconnected phase, wherein the equalizers are fully turned on in the active phase to improve the signal quality of the different main channels; In response to the auxiliary channel detection result and the main channel detection results indicating that a target channel group in the different main channels has an idle event, the control circuit controls at least one corresponding equalizer corresponding to the target channel group in the equalizers to enter the sleep phase from the active phase, wherein the at least one corresponding equalizer is fully turned off in the sleep phase to save power; and In response to the auxiliary channel detection result and the main channel detection results indicating that a wake-up event has occurred, the control circuit controls all the equalizers to return to the active phase. The adapter driver as described in claim 4, wherein the conditions for the establishment of the idle event include: The auxiliary channel detection result indicates that the at least one auxiliary channel is in a connected state; and The main channel detection results indicate that the target channel group has no level switching. The adapter driver as described in claim 4, wherein the conditions for the wake-up event include: The auxiliary channel detection result indicates that the at least one auxiliary channel is in a connected state, and the at least one auxiliary channel has the command-type switching event; or The main channel detection results indicate that the target channel group has a level switch. The adapter driver as described in claim 1, wherein the connection phase includes an active phase and a sleep phase, and the adapter driver further includes a plurality of high-speed switching detectors for respectively detecting high-frequency switching of the different main channels of the signal transmission system and a plurality of low-speed switching detectors for respectively detecting low-frequency switching of the different main channels of the signal transmission system, wherein the control circuit is coupled to the high-speed switching detectors to receive a plurality of high-frequency switching detection results, and the control circuit is coupled to the low-speed switching detectors to receive a plurality of low-frequency switching detection results; In response to the auxiliary channel detection result indicating that the at least one auxiliary channel changes from the unconnected level to the connected level and the at least one auxiliary channel has the command-type switching event, the control circuit controls the equalizers to enter the active stage from the disconnected stage, wherein the equalizers are fully turned on in the active stage to improve the signal quality of the different main channels; In response to the auxiliary channel detection result, the high frequency switching detection results and the low frequency switching detection results indicating an idle event in a target channel group in the different main channels, the control circuit controls at least one corresponding equalizer corresponding to the target channel group in the equalizers to enter the sleep phase from the active phase, wherein the at least one corresponding equalizer is fully turned off in the sleep phase to save power; and In response to the auxiliary channel detection result, the high frequency switching detection results and the low frequency switching detection results indicating a wake-up event, the control circuit controls all the equalizers to return to the active phase. The adapter driver as claimed in claim 7, wherein the establishment condition of the idle event includes: the auxiliary channel detection result indicates that the at least one auxiliary channel is in a connected state, the high-frequency switching detection results indicate that the target channel group has no high-frequency switching, and the low-frequency switching detection results indicate that the target channel group has no low-frequency switching; Wherein, the establishment condition of the wake-up event includes: the auxiliary channel detection result indicates that the at least one auxiliary channel is in a connected state and the at least one auxiliary channel has the command-type switching event, or the high-frequency switching detection results indicate that the target channel group has a high-frequency switching, or the low-frequency switching detection results indicate that the target channel group has a low-frequency switching. The adapter driver as described in claim 1, wherein the connection stage includes an active stage, a standby stage and a sleep stage, and the adapter driver further includes a plurality of main channel detectors for respectively detecting the level switching of the different main channels of the signal transmission system, wherein the control circuit is coupled to the main channel detectors to receive a plurality of main channel detection results; In response to the auxiliary channel detection result indicating that the at least one auxiliary channel changes from the unconnected level to the connected level and the at least one auxiliary channel has the command-type switching event, the control circuit controls the equalizers to enter the active stage from the disconnected stage, wherein the equalizers are fully turned on in the active stage to improve the signal quality of the different main channels; In response to the auxiliary channel detection result and the main channel detection results indicating that a target channel group in the different main channels has an idle event, the control circuit controls at least one corresponding equalizer corresponding to the target channel group in the equalizers to enter the standby stage from the active stage, wherein the at least one corresponding equalizer is half-closed in the standby stage to save power; In response to the auxiliary channel detection result and the main channel detection results indicating that the target channel group in the different main channels has a sleep event, the control circuit controls the at least one corresponding equalizer corresponding to the target channel group in the equalizers to enter the sleep stage from the standby stage, wherein the at least one corresponding equalizer is fully turned off in the sleep stage to further save power; and In response to the auxiliary channel detection result and the main channel detection results indicating that a wake-up event has occurred, the control circuit controls all the equalizers to return to the active stage. The adapter driver as claimed in claim 9, wherein the establishment condition of the idle event includes: the auxiliary channel detection result indicates that the at least one auxiliary channel is in a connected state and the main channel detection results indicate that the target channel group has no level switching; Wherein, the establishment condition of the sleep event includes: the auxiliary channel detection result indicates that the at least one auxiliary channel is in a connected state and the main channel detection results indicate that the target channel group has no level switching and reaches a threshold duration; Wherein, the establishment condition of the wake-up event includes: the auxiliary channel detection result indicates that the at least one auxiliary channel is in a connected state and the at least one auxiliary channel has the command-type switching event, or the main channel detection results indicate that the target channel group has a level switching. The adapter driver as described in claim 1, wherein the connection phase includes an active phase, a standby phase and a sleep phase, and the adapter driver further includes a plurality of high-speed switching detectors for respectively detecting high-frequency switching of the different main channels of the signal transmission system and a plurality of low-speed switching detectors for respectively detecting low-frequency switching of the different main channels of the signal transmission system, wherein the control circuit is coupled to the high-speed switching detectors to receive a plurality of high-frequency switching detection results, and the control circuit is coupled to the low-speed switching detectors to receive a plurality of low-frequency switching detection results; In response to the auxiliary channel detection result indicating that the at least one auxiliary channel changes from the unconnected level to the connected level and the at least one auxiliary channel has the command-type switching event, the control circuit controls the equalizers to enter the active stage from the disconnected stage, wherein the equalizers are fully turned on in the active stage to improve the signal quality of the different main channels; In response to the auxiliary channel detection result, the high-frequency switching detection results, and the low-frequency switching detection results indicating that an idle event occurs in a target channel group in the different main channels, the control circuit controls at least one corresponding equalizer corresponding to the target channel group in the equalizers to enter the standby stage from the active stage, wherein the at least one corresponding equalizer is half-closed in the standby stage to save power; In response to the auxiliary channel detection result, the high frequency switching detection results and the low frequency switching detection results indicating that the target channel group in the different main channels has a sleep event, the control circuit controls the at least one corresponding equalizer corresponding to the target channel group in the equalizers to enter the sleep stage from the standby stage, wherein the at least one corresponding equalizer is fully turned off in the sleep stage to further save power; and In response to the auxiliary channel detection result, the high frequency switching detection results and the low frequency switching detection results indicating that a wake-up event has occurred, the control circuit controls all the equalizers to return to the active stage. The switching driver as claimed in claim 11, wherein the establishment condition of the idle event includes the auxiliary channel detection result indicating that the at least one auxiliary channel is in a connected state, the high-frequency switching detection results indicating that the target channel group has no high-frequency switching, and the low-frequency switching detection results indicating that the target channel group has no low-frequency switching; The establishment condition of the sleep event includes the auxiliary channel detection result indicating that the at least one auxiliary channel is in a connected state, the high-frequency switching detection results indicating that the target channel group has no high-frequency switching and reaches a first threshold duration, and the low-frequency switching detection results indicating that the target channel group has no low-frequency switching and reaches a second threshold duration; The conditions for the wake-up event include: the auxiliary channel detection result indicates that the at least one auxiliary channel is in a connected state and the at least one auxiliary channel has the command-type switching event, or the high-frequency switching detection results indicate that the target channel group has a high-frequency switching, or the low-frequency switching detection results indicate that the target channel group has a low-frequency switching.

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