Edge regulation circuit, integrated circuit and electronic device

Abstract

The embodiment of the present application provides an edge adjustment circuit, an integrated circuit and an electronic device, wherein the edge adjustment circuit includes a state switching unit, a capacitor unit, a switch unit and a load capacitor, wherein one end of the load capacitor is used to output a demand signal: the state switching unit is connected to the capacitor unit and is used to connect to a preset power supply, the state switching unit is used to receive an input signal and control the preset power supply to charge the capacitor unit according to the level state of the input signal; the switch unit is connected to the preset power supply and the load capacitor, and is used to control the preset power supply to charge and discharge the load capacitor according to the charging state of the capacitor unit, so as to control the edge slope of the demand signal. The edge adjustment circuit provided in the embodiment of the present application can adjust the edge slope of the demand signal so that the demand signal can smoothly pass the eye diagram test.

Description

Technical Field

[0001] The present application relates to the technical field of electronic circuits, and in particular to an edge regulation circuit, an integrated circuit and an electronic device. Background Art

[0002] Eye diagram refers to a graph observed on an oscilloscope when using experimental methods to estimate and improve the performance of a transmission system. The method of observing the eye diagram is to connect the oscilloscope across the output end of the receiving filter, and then adjust the scanning cycle of the oscilloscope so that the horizontal scanning cycle of the oscilloscope is synchronized with the cycle of the received code element. At this time, the image observed on the screen of the oscilloscope is similar to an eye, so it is called an eye diagram. The eye diagram of the signal contains rich information, which can reflect the overall characteristics of the signal and can evaluate the quality of the signal. Therefore, the analysis of the eye diagram is one of the keys to signal integrity analysis.

[0003] In the eye diagram test, in order to simply and intuitively determine whether the eye diagram indicators meet the requirements, the requirements defined in the specification can be made into a template, and then called through an oscilloscope to observe whether the eye diagram touches the template. If it does not touch the template, it means that the eye diagram indicators meet the specification requirements. Since whether the eye diagram touches the template is related to the edge slope of the signal, the larger the edge slope of the signal, the less likely the eye diagram is to touch the template. Therefore, in order to pass the eye diagram test, how to adjust the edge slope of the signal is a research hotspot for technicians in this field. Summary of the invention

[0004] In view of the above problems, the embodiments of the present application provide an edge adjustment circuit, an integrated circuit and an electronic device to solve the above technical problems.

[0005] The embodiment of the present application is implemented by adopting the following technical solutions:

[0006] An edge regulation circuit comprises a state switching unit, a capacitor unit, a switch unit and a load capacitor, wherein one end of the load capacitor is used to output a demand signal; the state switching unit is connected to the capacitor unit and is used to connect to a preset power supply, the state switching unit is used to receive an input signal, and control the preset power supply to charge the capacitor unit according to the level state of the input signal; the switch unit is connected to the preset power supply and the load capacitor, and is used to control the preset power supply to charge and discharge the load capacitor according to the charging state of the capacitor unit, so as to control the edge slope of the demand signal.

[0007] In some embodiments, the level state includes a first level state and a second level state, and the state switching unit is used to control the preset power supply to charge the capacitor unit according to the first level state of the input signal, so that the capacitor unit is in the first charging state; the switch unit is also used to control the preset power supply to charge the capacitor unit according to the second level state of the input signal, so that the capacitor unit is in the second charging state; the switch unit includes a first switch branch and a second switch branch, the first switch branch is connected between the preset power supply and the load capacitor, and the second switch branch is connected between the load capacitor and the ground terminal, the first switch branch is used to be turned on when the capacitor unit is in the first charging state, so that the preset power supply charges the load capacitor to control the rising edge slope of the demand signal; the second switch branch is used to be turned on when the capacitor unit is in the second charging state, so that the load capacitor is discharged to control the falling edge slope of the demand signal.

[0008] In some embodiments, the capacitor unit includes a first capacitor subunit and a second capacitor subunit, wherein the control end of the first switch branch is connected to the first capacitor subunit, and the control end of the second switch branch is connected to the second capacitor subunit; the state switching unit is used to control the preset power supply to charge the first capacitor subunit according to the first level state of the input signal, and the first switch branch is used to turn on the connection between the preset power supply unit and the load capacitor according to the charging state of the first capacitor subunit, so that the preset power supply charges the load capacitor; the state switching unit is also used to control the preset power supply to charge the second capacitor subunit according to the second level state of the input signal, and the second switch branch is used to turn on the connection between the load capacitor and the ground terminal according to the charging state of the second capacitor subunit, so that the load capacitor discharges.

[0009] In some embodiments, the input signal includes a first sub-input signal and a second sub-input signal, and the level states of the first sub-input signal and the second sub-input signal at the same time are opposite; the state switching unit includes a first switch and a second switch: the first switch includes a control end and two connection ends, one of which is used to connect to a preset power supply and the other connection end is grounded, the control end of the first switch is used to receive the first sub-input signal, and the two connection ends of the first switch are connected in parallel with the first capacitor subunit; the second switch includes a control end and two connection ends, one of which is connected to the preset power supply and the other connection end is grounded, the control end of the second switch is used to receive the second sub-input signal, and the two connection ends of the second switch are connected in parallel with the second capacitor subunit; in the first level state, the first switch is used to shut down according to the first sub-input signal so that the preset power supply charges the first capacitor subunit; in the second level state, the second switch is used to shut down according to the second sub-input signal so that the preset power supply charges the second capacitor subunit.

[0010] In some embodiments, in the first level state, the second switch is used to be turned on according to the second sub-input signal to prevent the preset power supply from charging the second capacitor subunit; in the second level state, the first switch is used to be turned on according to the first sub-input signal to prevent the preset power supply from charging the first capacitor subunit.

[0011] In some embodiments, the first switch branch includes a third switch, wherein the third switch includes a control end and two connection ends, wherein one connection end is connected to a preset power supply, and the other connection end is connected to one end of the load capacitor, and the control end of the third switch is connected to the first end of the first capacitor subunit.

[0012] In some embodiments, the second switch branch includes a fourth switch: wherein the fourth switch includes a control end and two connection ends, wherein one connection end is connected to one end of the load capacitor, and the other connection end is connected to the ground end, and the control end of the fourth switch is connected to the first end of the second capacitor subunit.

[0013] In some embodiments, the edge regulation circuit also includes a fifth switch and a voltage-dividing resistor; the fifth switch includes a control end and two connection ends, one connection end is connected to a preset power supply, the other connection end is connected to one end of the voltage-dividing resistor, the other end of the voltage-dividing resistor is grounded, the connection node between the fifth switch and the voltage-dividing resistor is connected to the control end of the second switch branch, and the control end of the fifth switch is connected to the second capacitor subunit; the fifth switch is used to turn on according to the charging state of the second capacitor subunit to control the switching state of the second switch branch.

[0014] In some embodiments, the second capacitor subunit is a capacitor array, and the edge adjustment circuit also includes a capacitor adjustment circuit, which is connected to the capacitor array and is used to adjust the capacitance value of the capacitor array to adjust the conduction speed of the second switch branch and the falling edge slope of the demand signal.

[0015] In some embodiments, the preset power supply includes a first current source module, a second current source module and a power supply module, wherein the first current source module is connected to a state switching unit to charge the first capacitor subunit; the second current source module is connected to the state switching unit to charge the second capacitor subunit; and the power supply module is connected to the switching unit to charge the load capacitor.

[0016] In some embodiments, the edge regulation circuit further includes a buffer circuit connected between the power supply unit and the load capacitor.

[0017] An embodiment of the present application also provides an electronic device, including a device body and an integrated circuit as described above disposed in the device body.

[0018] The edge adjustment circuit, integrated circuit and electronic device provided by the embodiment of the present application are provided with a state switching unit, a capacitor unit, a switch unit and a load capacitor, and one end of the load capacitor is used to output a demand signal. Among them, the state switching unit is connected to the capacitor unit and is used to connect a preset power supply. The state switching unit is used to receive an input signal and control the preset power supply to charge the capacitor according to the level state of the input signal; the switch unit is connected to the preset power supply and the load capacitor, and is used to control the preset power supply to charge and discharge the load capacitor according to the charging state of the charging unit of the capacitor unit to control the edge slope of the demand signal. In this embodiment, the charge and discharge of the capacitor unit is controlled by the state switching unit, and the switch of the switch unit is controlled by the capacitor unit, so that the switching speed of the switch unit is adjustable, and the charge and discharge of the load capacitor is controlled by the switch unit, so that the charge and discharge speed of the load capacitor is adjustable, and the edge slope of the demand signal is related to the charge and discharge speed of the load capacitor. For example, when the discharge speed of the load capacitor is slower, the falling edge slope of the demand signal is smaller, so the edge adjustment circuit of this embodiment can adjust the edge slope of the demand signal so that the demand signal can pass the eye diagram test smoothly.

[0019] These and other aspects of the present application will become more clearly understood in the description of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic diagram of an eye diagram template is shown.

[0022] Figure 2 A module block diagram of an edge adjustment circuit provided in an embodiment of the present application is shown.

[0023] Figure 3 A module block diagram of a state switching unit, a capacitor unit, and a switch unit provided in an embodiment of the present application is shown.

[0024] Figure 4 A circuit structure schematic diagram of an edge adjustment circuit provided in an embodiment of the present application is shown.

[0025] Figure 5 A waveform diagram of a demand signal provided in an embodiment of the present application is shown.

[0026] Figure 6 A schematic diagram of an adjustment waveform of a demand signal provided in an embodiment of the present application is shown.

[0027] Figure 7 A schematic structural diagram of an integrated circuit provided in an embodiment of the present application is shown.

[0028] Figure 8 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0030] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0031] Eye diagram refers to a graph observed on an oscilloscope when using experimental methods to estimate and improve the performance of a transmission system. The method of observing the eye diagram is to connect the oscilloscope across the output end of the receiving filter, and then adjust the scanning cycle of the oscilloscope so that the horizontal scanning cycle of the oscilloscope is synchronized with the cycle of the received code element. At this time, the image observed on the screen of the oscilloscope is similar to an eye, so it is called an eye diagram. The eye diagram of the signal contains rich information, which can reflect the overall characteristics of the signal and can evaluate the quality of the signal. Therefore, the analysis of the eye diagram is one of the keys to signal integrity analysis.

[0032] like Figure 1 As shown in the figure, in order to simply and intuitively judge whether the eye diagram indicators meet the requirements in the eye diagram test, the requirements defined in the specification can be made into a template ( Figure 1 The gray part in the middle is the template), and then call it through the oscilloscope to observe whether the eye diagram touches the template. If it does not touch the template, it means that the indicators of the eye diagram meet the specification requirements.

[0033] Eye diagram adjustment has the following problems:

[0034] 1. The peripheral circuits may be varied and must be compatible with both light loads and heavy loads, requiring the circuit to have strong charging and discharging capabilities;

[0035] 2. The rising and falling edges of the communication signal should be greater than 300ns and less than 1300ns, which requires strong control over the communication signal;

[0036] 3. Authentication requires that the communication signal should not be touched Figure 1 In the template, since different equipment loads may be different, the circuit needs to have a certain edge adjustment capability to meet the slope adjustment requirements so that it can pass the certification of most equipment.

[0037] Whether the eye diagram touches the template is related to the edge slope of the signal. The larger the edge slope of the signal, the less likely the eye diagram will touch the template. Therefore, how to adjust the edge slope of the signal in order to pass the eye diagram test is a hot topic for technicians in this field.

[0038] After long-term research and testing by the inventor, the embodiment of the present application provides an edge regulation circuit, an integrated circuit and an electronic device, wherein the edge regulation circuit is provided with a state switching unit, a capacitor unit, a switch unit and a load capacitor, and one end of the load capacitor is used to output a demand signal. Among them, the state switching unit is connected to the capacitor unit and is used to connect to a preset power supply. The state switching unit is used to receive an input signal and control the preset power supply to charge the capacitor unit according to the level state of the input signal; the switch unit is connected to the preset power supply and the load capacitor, and is used to control the preset power supply to charge and discharge the load capacitor according to the charging state of the capacitor unit to control the edge slope of the demand signal. In this embodiment, the charging and discharging of the capacitor unit is controlled by the state switching unit, and the switching of the switch unit is controlled by the capacitor unit, so that the switching speed of the switch unit is adjustable, and the charging and discharging of the load capacitor is controlled by the switch unit, thereby making the charging and discharging speed of the load capacitor adjustable. The edge slope of the demand signal is related to the charging and discharging speed of the load capacitor. For example, the faster the discharge speed of the load capacitor, the smaller the falling edge slope of the demand signal. Therefore, the edge adjustment circuit of this embodiment can adjust the edge slope of the demand signal so that the demand signal can successfully pass the eye diagram test.

[0039] like Figure 2 As shown, an embodiment of the present application provides an edge adjustment circuit 100, which includes a state switching unit 110, a capacitor unit 120, a switch unit 130 and a load capacitor 140, wherein one end of the load capacitor 140 is used to output a demand signal. The state switching unit 110 is connected to the capacitor unit 120 and is used to connect to a preset power supply 150. The state switching unit 110 is used to receive an input signal and control the preset power supply 150 to charge the capacitor unit 120 according to the level state of the input signal; the switch unit 130 is connected to the preset power supply 150 and the load capacitor 140, and is used to control the preset power supply 150 to charge and discharge the load capacitor 140 according to the charging state of the capacitor unit 120, so as to control the edge slope of the demand signal.

[0040] In this embodiment, the state switching unit 110 can be turned on or off according to the level state of the input signal, and then turn on or off the connection between the preset power supply 150 and the capacitor unit 120. When the state switching unit 110 turns on the connection between the preset power supply 150 and the capacitor unit 120, the preset power supply 150 can charge the capacitor unit 120. In this embodiment, the capacitor unit 120 may include a plurality of capacitor subunits. Each of the capacitor subunits may include at least one capacitor. The state switching unit 110 can turn on or off the connection between each capacitor subunit and the preset power supply according to the level state of the input signal. Further, the capacitor unit may include a plurality of charging states, each of which may correspond to at least one capacitor subunit.

[0041] Further, the switch unit 130 can control the preset power supply 150 to charge and discharge the load capacitor 140 according to the charging state of the capacitor unit 120. The switch unit 130 can have multiple switch branches. On the one hand, some branches of the switch unit 130 can be turned on in a charging state of the capacitor unit 120, so that the preset power supply 150 charges the load capacitor 140 through some branches that are turned on at this time. On the other hand, other branches of the switch unit 130 can also be turned on in another charging state of the capacitor unit 120, so that the load capacitor 140 is discharged through other branches that are turned on at this time. Since one end of the load capacitor 140 is used to output the demand signal, the charging process of the load capacitor 140 is also the edge rising process of the demand signal, and the discharging process of the load capacitor 140 is also the edge falling process of the demand signal.

[0042] As an implementation method, the capacitance of the capacitor unit 120 is adjustable. Since the size of the capacitor affects the speed at which the capacitor voltage rises, when the capacitance of the capacitor unit 120 changes, the speed at which the voltage of the capacitor unit 120 rises is changed, thereby changing the opening speed of the switch unit 130. When the switch unit 130 is turned on when the voltage gradually increases in a charging state of the capacitor unit 120, so that the preset power supply 150 charges the load capacitor 140, the change in the opening speed of the switch unit 130 causes the charging speed of the load capacitor 140 to change, thereby changing the rising edge slope of the demand signal. When the switch unit 130 is turned on when the voltage gradually increases in another charging state of the capacitor unit 120, so that the load capacitor 140 is discharged, the change in the opening speed of the switch unit 130 causes the discharge speed of the load capacitor 140 to change, thereby changing the lower rising edge slope of the demand signal.

[0043] It can be seen that the edge adjustment circuit 100 provided in the embodiment of the present application can adjust the capacitance of the capacitor unit 120, thereby adjusting the edge slope of the required signal. Figure 1It can be seen that when the edge slope of the demand signal is smaller, the demand signal is less likely to contact the template. Therefore, the edge adjustment circuit 100 can make the edge slope of the demand signal adjustable, so that the demand signal can successfully pass the eye diagram test.

[0044] Specifically, the level state of the input signal includes a first level state and a second level state. The state switching unit 110 is used to control the preset power supply 150 to charge one of the capacitor subunits in the capacitor unit 120 according to the first level state of the input signal, so that the capacitor unit 120 is in a first charging state. In the first charging state, the capacitor unit 120 can make a branch in the switch unit 130 conductive, so that the preset power supply 150 charges the load capacitor 140. The state switching unit 110 is also used to control the preset power supply 150 to charge another capacitor subunit in the capacitor unit 120 according to the second level state of the input signal, so that the capacitor is in a second charging state. In the second charging state, the capacitor unit 120 can make another branch in the switch unit 130 conductive, so that the load capacitor 140 is discharged.

[0045] like Figure 3 As shown, the state switching unit 110 includes a first switch 111 and a second switch 112. The first switch 111 includes a control end and two connection ends; the control end of the first switch 111 is used to receive an input signal, one connection end is used to connect to a preset power source 150, and the other connection end is grounded. The second switch 112 includes a control end and two connection ends, the control end of the second switch 112 is used to receive an input signal, one connection end is used to connect to a preset power source 150, and the other connection end is grounded.

[0046] The capacitor unit 120 includes a first capacitor subunit 121 and a second capacitor subunit 122 , wherein the first capacitor subunit 121 is connected in parallel to two connection ends of the first switch 111 ; and the second capacitor subunit 122 is connected in parallel to two connection ends of the second switch 112 .

[0047] The switch unit 130 includes a first switch branch 131 and a second switch branch 132. The first switch branch 131 is connected between the preset power source 150 and the load capacitor 140, and the control end of the first switch branch 131 is connected to the first capacitor subunit 121; the second switch branch 132 is connected between the load capacitor 140 and the ground, and the control end is connected to the second capacitor subunit 122.

[0048] Specifically, the first switch branch 131 includes a third switch 1311. The third switch 1311 includes a control end and two connection ends, one of which is connected to the preset power supply 150, and the other connection end is connected to one end of the load capacitor 140, and the control end of the third switch 1311 is connected to one end of the first capacitor subunit 121. The second switch branch 132 includes a fourth switch 1321. The fourth switch 1321 includes a control end and two connection ends, one of which is connected to one end of the load capacitor 140, and the other connection end is connected to the ground end, and the control end of the fourth switch 1321 is connected to the first end of the second capacitor subunit 122.

[0049] The preset power supply 150 includes a first current source module 151, a second current source module 152 and a power module 153. The first current source module 151 is connected to the state switching unit 110, specifically, the first current source module 151 is connected to the first switch 111, and is controlled by the first switch 111 to charge the first capacitor subunit 121; the second current source module 152 is connected to the state switching unit 110, specifically, the second current source module 152 is connected to the second switch 112, and is controlled by the second switch 112 to charge the second capacitor subunit 122; the power module 153 is connected to the switch unit 130, and is controlled by the switch unit 130 to charge the load capacitor 140. Further, the first current source module 151 can charge the first capacitor subunit 121 with a constant current, and the second current source module 152 can charge the second capacitor subunit 122 with a constant current.

[0050] In this embodiment, the state switching unit 110 is used to control the preset power supply 150 to charge the first capacitor subunit 121 according to the first level state of the input signal, and is used to control the preset power supply 150 to charge the second capacitor subunit 122 according to the second level state of the input signal. Specifically, the first switch 111 is used to control the first current source module 151 to charge the first capacitor subunit 121 according to the first level state of the input signal, and the second switch 112 is used to control the second current source module 152 to charge the second capacitor subunit 122 according to the second level state of the input signal.

[0051] Further, the input signal includes a first sub-input signal and a second sub-input signal. The level states of the first sub-input signal and the second sub-input signal at the same time are opposite. That is, when the first sub-input signal is at a high level, the second sub-input signal is at a low level; when the first sub-input signal is at a low level, the second sub-input signal is at a high level. In this embodiment, the first sub-input signal may be a negated signal of the second sub-input signal. Further, the first level state of the input signal may be that the first sub-input signal is at a low level and the second sub-input signal is at a high level; the second level state of the input signal may be that the first sub-input signal is at a high level and the second sub-input signal is at a low level.

[0052] Further, when the level state of the input signal is in the first level state, the first switch 111 is used to be turned off according to the first sub-input signal, so that the first current source module 151 charges the first capacitor subunit 121 with a constant current, and the capacitor unit 120 is in the first charging state; the second switch 112 is used to be turned on according to the second sub-input signal, so that the two ends of the second capacitor subunit 122 are short-circuited, thereby preventing the second current source module 152 from charging the second capacitor subunit 122. As the first capacitor subunit 121 is charged, the voltage across the first capacitor subunit 121 gradually rises. At this time, in the charging state of the first capacitor subunit 121, that is, in the first charging state of the capacitor unit 120, the first switch branch 131 conducts the connection between the power module 153 and the load capacitor 140 according to the charging state of the first capacitor subunit 121, so that the power module 153 charges the load capacitor 140, thereby generating a rising edge of the demand signal.

[0053] During the generation of the rising edge of the demand signal, when the voltage of the first capacitor subunit 121 gradually rises, the voltage of the control end of the third switch 1311 gradually rises, so that the on-resistance of the third switch 1311 gradually decreases, thereby gradually increasing the charging current of the load capacitor 140, thereby gradually accelerating the charging speed of the load capacitor 140 until the voltage across the load capacitor 140 reaches a fixed value. It can be seen that the rising edge of the demand signal is not a straight line, but a curve with a changing slope.

[0054] In this embodiment, when the capacitance of the first capacitor subunit 121 is adjusted, the rising speed of the voltage at the control end of the third switch 1311 can be changed, so that the conduction speed of the third switch 1311 changes, thereby changing the charging current of the load capacitor 140 at the same time. At this time, the charging speed of the load capacitor 140 at the same time also changes accordingly, thereby adjusting the rising edge slope of the demand signal. Specifically, when the capacitance of the first capacitor subunit 121 is increased, the voltage at the control end of the third switch 1311 rises more slowly. At this time, compared with the case where the capacitance of the first capacitor subunit 121 is not increased, the voltage at the control end of the third switch 1311 at the same time is lower, so that the conduction speed of the third switch 1311 slows down, thereby making the charging current of the load capacitor 140 at the same time smaller, and the charging speed of the load capacitor 140 slows down, thereby making the rising edge slope of the demand signal smaller. On the contrary, when the capacitance of the first capacitor subunit 121 is reduced, the voltage at the control end of the third switch 1311 rises faster. Compared with the case where the capacitance of the first capacitor subunit 121 is not increased, the voltage at the control end of the third switch 1311 is higher at the same time, so that the conduction speed of the third switch 1311 becomes faster, and then the charging current of the load capacitor 140 becomes larger at the same time, and the charging speed of the load capacitor 140 becomes faster, so that the rising edge slope of the demand signal becomes larger.

[0055] It can be seen that the edge adjustment circuit 100 provided in the embodiment of the present application can adjust the rising edge slope of the demand signal by adjusting the capacitance of the first capacitor subunit 121.

[0056] Further, when the level state of the input signal is in the second level state, the first switch 111 is used to be turned on according to the first sub-input signal, so that the two ends of the first capacitor subunit 121 are short-circuited, thereby preventing the first current source module 151 from charging the first capacitor subunit 121; the second switch 112 is used to be turned off according to the second sub-input signal, so that the second current source module 152 charges the second capacitor subunit 122 with a constant current, and the capacitor unit 120 is in the second charging state. As the second capacitor subunit 122 is charged, the voltage across the two ends of the second capacitor subunit 122 gradually rises. At this time, in the charging state of the second capacitor subunit 122, that is, in the second charging state of the capacitor unit 120, the second switch branch 132 conducts the connection between the load capacitor 140 and the ground terminal according to the charging state of the second capacitor subunit 122, so that the load capacitor 140 is discharged, thereby generating a falling edge of the demand signal.

[0057] During the generation of the falling edge of the demand signal, when the voltage of the second capacitor subunit 122 gradually increases, the voltage of the control end of the fourth switch 1321 gradually increases, so that the on-resistance of the fourth switch 1321 gradually decreases, thereby gradually increasing the discharge current of the load capacitor 140, thereby gradually accelerating the discharge speed of the load capacitor 140 until the voltage of the load capacitor 140 is zero. It can be seen that the falling edge of the demand signal is not a straight line, but a curve with a changing slope.

[0058] In this embodiment, when the capacitance of the second capacitor subunit 122 is adjusted, the rising speed of the voltage at the control end of the fourth switch 1321 can be changed, so that the conduction speed of the fourth switch 1321 changes, thereby changing the discharge current of the load capacitor 140 at the same time. At this time, the discharge speed of the load capacitor 140 at the same time also changes accordingly, thereby adjusting the falling edge slope of the demand signal. Specifically, when the capacitance of the second capacitor subunit 122 is increased, the voltage at the control end of the fourth switch 1321 rises more slowly. At this time, compared with the case where the capacitance of the second capacitor subunit 122 is not increased, the voltage at the control end of the fourth switch 1321 at the same time is lower, so that the conduction speed of the fourth switch 1321 slows down, thereby making the discharge current of the load capacitor 140 at the same time smaller, and the discharge speed of the load capacitor 140 slows down, so that the falling edge slope of the demand signal is smaller. When the capacitance of the second capacitor subunit 122 is reduced, the voltage at the control end of the fourth switch 1321 rises faster. Compared with the case where the capacitance of the second capacitor subunit 122 is not increased, the voltage at the control end of the fourth switch 1321 is higher at the same time, so that the conduction speed of the fourth switch 1321 becomes faster, and then the discharge current of the load capacitor 140 becomes larger at the same time, and the discharge speed of the load capacitor 140 becomes faster, so that the falling edge slope of the demand signal is larger.

[0059] It can be seen that the edge adjustment circuit 100 provided in the embodiment of the present application can adjust the falling edge slope of the demand signal by adjusting the capacitance of the second capacitor subunit 122 .

[0060] The edge adjustment circuit provided in the embodiment of the present application is provided with a state switching unit, a capacitor unit, a switch unit and a load capacitor, and one end of the load capacitor is used to output a demand signal. Among them, the state switching unit is connected to the capacitor unit and is used to connect a preset power supply. The state switching unit is used to receive an input signal and control the preset power supply to charge the capacitor according to the level state of the input signal; the switch unit is connected to the preset power supply and the load capacitor, and is used to control the preset power supply to charge and discharge the load capacitor according to the charging state of the charging unit of the capacitor unit to control the edge slope of the demand signal. In this embodiment, the charge and discharge of the capacitor unit is controlled by the state switching unit, and the switch of the switch unit is controlled by the capacitor unit, so that the switching speed of the switch unit is adjustable, and the charge and discharge of the load capacitor is controlled by the switch unit, so that the charge and discharge speed of the load capacitor is adjustable, and the edge slope of the demand signal is related to the charge and discharge speed of the load capacitor. For example, when the discharge speed of the load capacitor is slower, the falling edge slope of the demand signal is smaller, so the edge adjustment circuit of this embodiment can adjust the edge slope of the demand signal so that the demand signal can pass the eye diagram test smoothly. Among them, the rising edge slope and the falling edge slope of the demand signal can be adjusted by adjusting the capacitance of the capacitor unit. In this embodiment, the capacitance of the first capacitor subunit and the second capacitor subunit in the capacitor unit are both adjustable, so that the slopes of the upper and lower edges of the demand signal can be adjusted at the same time. In some embodiments, only one of the capacitance of the first capacitor subunit and the second capacitor subunit in the capacitor unit is adjustable, so that the rising edge slope or the falling edge slope of the demand signal can be adjusted.

[0061] like Figure 4 As shown, the embodiment of the present application further provides an edge regulation circuit 200, which includes a state switching unit 210, a capacitor unit 220, a switch unit 230, and a load circuit 240. The state switching unit 210 is connected to the capacitor unit 220 and is used to connect to a preset power supply; the switch unit 230 is controlled by the capacitor unit 220 and is connected to the preset power supply and the load circuit 240, wherein the state switching unit 210 is used to receive an input signal, and the load circuit 240 is used to output a demand signal.

[0062] In this embodiment, the preset power source includes a first current source IBIAS1, a second current source IBIAS2 and a power source VDD. The first current source IBIAS1 and the second current source IBIAS2 can be generated by the power source VDD. The first current source IBIAS1 and the second current source IBIAS2 generate a constant small current respectively.

[0063] The state switching unit 210 includes a first switch, a second switch, a first resistor R1, and a second resistor R2. The first switch is a first MOS transistor Q1, and the second switch is a second MOS transistor Q2. The first end of the first resistor R1 is connected to the first current source IBIAS1, and the second end is connected to the drain of the first MOS transistor Q1. The source of the first MOS transistor Q1 is grounded, and the gate is used to receive an input signal. In this embodiment, the second end of the first resistor R1 is connected to the capacitor unit 220. The first end of the second resistor R2 is connected to the second current source IBIAS2, and the second end is connected to the drain of the second MOS transistor, wherein the source of the second MOS transistor Q2 is grounded, and the gate is used to receive an input signal.

[0064] Optionally, the state switching unit 210 further includes a third MOS transistor Q3. The source and drain of the third MOS transistor Q3 are connected between the second end of the second resistor R2 and the drain of the second MOS transistor Q2, and the drain and gate of the third MOS transistor Q3 are connected to each other. In this embodiment, the second end of the second resistor R2 is connected to the capacitor unit 220.

[0065] The capacitor unit 220 includes a first capacitor subunit 221 and a second capacitor subunit 222. The first capacitor subunit 221 includes a fourth MOS tube Q4, a fifth MOS tube Q5 and a first capacitor C1. The drain of the fourth MOS tube Q4 is connected to the second end of the first resistor R1, the gate and the drain are connected to each other, and the source is connected to the first end of the first capacitor C1. The second end of the first capacitor C1 is grounded. The drain of the fifth MOS tube Q5 is connected to the first end of the first capacitor C1, the source is connected to the second end of the first capacitor C1, and the gate is used to receive an input signal. In this embodiment, the drain of the fourth MOS tube Q4 is connected to the switch unit 230.

[0066] The second capacitor subunit 222 includes a sixth MOS transistor Q6, a seventh MOS transistor Q7, an eighth MOS transistor Q8 and a capacitor array 2221. The drain of the sixth MOS transistor Q6 is connected to the second end of the second resistor R2, the source is connected to the drain of the seventh MOS transistor Q7, and the gate and the drain are connected to each other. The source of the seventh MOS transistor Q7 is connected to the first end of the capacitor array 2221, and the gate and the drain are connected to each other. In this embodiment, the edge adjustment circuit 200 also includes a capacitor adjustment circuit 250, which is connected to the capacitor array 2221 and is used to adjust the capacitance value of the capacitor array 2221. Specifically, the capacitor array 2221 may include a plurality of capacitors with the same or different capacitance values ​​and connected in parallel with each other. The capacitor adjustment circuit 250 may include a plurality of switches connected in series with the capacitors in the capacitor array 2221 one by one. The capacitance value of the capacitor array 2221 can be adjusted by controlling the on and off of the switches. Furthermore, the eighth MOS transistor Q8 is connected in parallel between the two ends of each capacitor and switch connected in series in the capacitor array and the capacitor adjustment circuit. When the eighth MOS transistor Q8 is turned on, the capacitor array forms a discharge loop.

[0067] In this embodiment, the edge regulation circuit 200 further includes a fifth switch and a voltage-dividing resistor. The fifth switch includes a control end and two connection ends, one of which is connected to a preset power supply, the other is connected to one end of the voltage-dividing resistor, the other end of the voltage-dividing resistor is grounded, the connection node between the fifth switch and the voltage-dividing resistor is connected to the control end of the second switch branch, and the control end of the fifth switch is connected to the second capacitor subunit 222; the fifth switch is used to turn on according to the charging state of the second capacitor subunit 222 to control the switch state of the second switch branch.

[0068] Specifically, the fifth switch is the ninth MOS tube Q9, and the voltage dividing resistor is the resistor R3. The drain of the ninth MOS tube Q9 is connected to the power supply VDD, the source is grounded through the third resistor R3, and the gate is connected to the second end of the second resistor R2. In this embodiment, the source of the ninth MOS tube Q9 is connected to the switch unit 230. Further optionally, the edge adjustment circuit 200 also includes a tenth MOS tube Q10 and an eleventh MOS tube Q11. The drain of the tenth MOS tube Q10 is connected to the first end of the third resistor R1, the source is connected to the second end of the third resistor R3, and the gate is used to receive the input signal. The source of the eleventh MOS tube Q11 is connected to the power supply VDD, the drain is connected to the drain of the ninth MOS tube Q9, and the gate is grounded.

[0069] In this embodiment, the edge regulation circuit 200 further includes a buffer circuit 260. The buffer circuit 260 is connected between the power supply VDD and the load circuit 240. The buffer circuit 260 may be an amplifier or a voltage follower. In this embodiment, the switch unit 230 includes a third switch and a fourth switch. Among them, the third switch is the twelfth MOS tube Q12, and the fourth switch is the thirteenth MOS tube Q13. The input end of the buffer circuit 260 is connected to the power supply VDD, and the output end is connected to the drain of the twelfth MOS tube Q12. The source of the twelfth MOS tube Q12 is connected to the drain of the thirteenth MOS tube Q13, and the gate is connected to the drain of the fourth MOS tube Q4. The source of the thirteenth MOS tube Q13 is grounded, and the gate is connected to the first end of the third resistor R3.

[0070] The load circuit 240 includes a load capacitor Cload and a load resistor Rload. The first end of the load capacitor Cload is connected to the source of the twelfth MOS transistor Q12, and the second end is grounded. The load resistor Cload is connected in parallel to both ends of the load capacitor Cload. In this embodiment, the first end of the load capacitor Cload outputs a demand signal.

[0071] In this embodiment, the input signal includes a first sub-input signal DATAN and a second sub-input signal DATA. The first sub-input signal DATAN is a negated signal of the second sub-input signal DATA. The first sub-input signal DATAN can be obtained by inputting the second sub-input signal DATA into an inverter output. The level states of the first sub-input signal DATAN and the second sub-input signal DATA are opposite at the same time. When the second sub-input signal DATA is in a high level state, the first sub-input signal DATAN is in a low level state; when the second sub-input signal DATA is in a low level state, the first sub-input signal DATAN is in a high level state.

[0072] Furthermore, the first MOS transistor Q1 and the fifth MOS transistor Q5 receive the first sub-input signal DATAN; the second MOS transistor Q2, the eighth MOS transistor Q8 and the tenth MOS transistor Q10 receive the second sub-input signal DATA.

[0073] Combination Figure 5 As shown, Figure 5 Schematic diagram of the waveform of the demand signal in this embodiment. In this embodiment, the principle of the edge adjustment circuit 200 generating the demand signal is as follows:

[0074] When the second sub-input signal DATA is in a high level state, the first sub-input signal DATAN is in a low level state. At this time, the first MOS tube Q1 is turned off, the second MOS tube Q2 is turned on, the fifth MOS tube Q5 is turned off, the eighth MOS tube Q8 is turned on, and the tenth MOS tube Q10 is turned on. The capacitor array 2221 is short-circuited by the second MOS tube Q2, and the first current source IBIAS1 charges the first capacitor C1 with a constant small current. During the charging process of the first capacitor C1, the fourth MOS tube Q4 is turned on so that the gate-source voltage Vgs12 of the twelfth MOS tube Q12 increases as the voltage at the first end of the first capacitor C1 increases. When the gate-source voltage Vgs12 of the twelfth MOS tube Q12 rises to the turn-on voltage Vth12 of the twelfth MOS tube Q12, the twelfth MOS tube Q12 is turned on, and at this time, the power supply VDD outputs a current through the buffer circuit 260 to charge the load capacitor Cload. At the beginning of the conduction of the twelfth MOS tube Q12, the difference between the gate-source voltage Vgs12 and the conduction voltage Vth12 is small, so that the conduction resistance of the twelfth MOS tube Q12 is large, and then the charging current of the load capacitor Cload is small, so that the charging speed of the load capacitor Cload is slow. As the first capacitor C1 is charged, the gate-source voltage Vgs12 of the twelfth MOS tube Q12 continues to rise. At this time, the difference between the gate-source voltage Vgs12 and the conduction voltage Vth12 increases, so that the conduction resistance of the twelfth MOS tube Q12 decreases, and then the charging current of the load capacitor Cload increases, so that the charging speed of the load capacitor Cload is accelerated until the voltage across the load capacitor Cload reaches a fixed value. In this embodiment, the charging process of the load capacitor Cload is also the rising edge process of the demand signal, and the charging speed of the load capacitor Cload also represents the rising edge slope of the demand signal.

[0075] When the second sub-input signal DATA is in a low level state, the first sub-input signal DATAN is in a high level state. The first MOS tube Q1 is turned on, the second MOS tube Q2 is turned off, the fifth MOS tube Q5 is turned on, the eighth MOS tube Q8 is turned off, and the tenth MOS tube Q10 is turned off. At this time, the first capacitor C1 is short-circuited by the first MOS tube Q1, and the second current source IBIAS2 charges the capacitor array 2221 with a constant small current. During the charging process of the capacitor array 2221, the sixth MOS tube Q6 and the seventh MOS tube Q7 are turned on so that the gate-source voltage of the ninth MOS tube Q9 increases with the increase of the voltage of the capacitor array 2221. At this time, the ninth MOS tube Q9 generates a voltage drop, and the gate-source voltage Vgs13 of the thirteenth MOS tube Q13 continues to rise with the gate-source voltage Vgs9 of the ninth MOS tube Q9 with a fixed voltage difference. Among them, the role of the ninth MOS tube Q9 is to improve the driving ability of the thirteenth MOS tube Q13. When the gate-source voltage Vgs13 of the thirteenth MOS tube Q13 rises to the conduction voltage Vth13 of the thirteenth MOS tube Q13, the thirteenth MOS tube Q13 is turned on, and at this time, the load capacitor Cload is discharged to the ground. In the initial stage of conduction, the difference between the gate-source voltage Vgs13 of the thirteenth MOS tube and the conduction voltage Vth13 is small, so that the conduction resistance of the thirteenth MOS tube Q13 is large, and then the discharge current of the load capacitor Cload is small, so that the discharge speed of the load capacitor Cload is slow. As the capacitor array 2221 is charged, the gate-source voltage Vgs13 of the thirteenth MOS tube Q13 continues to rise, and at this time, the difference between the gate-source voltage Vgs13 and the conduction voltage Vth13 increases, so that the conduction resistance of the thirteenth MOS tube Q13 decreases, and then the discharge current of the load capacitor Cload increases, so that the discharge speed of the load capacitor Cload is accelerated, until the voltage across the load capacitor Cload is zero. In this embodiment, the discharge process of the load capacitor Cload is also the falling edge process of the demand signal, and the discharge speed of the load capacitor Cload also represents the falling edge slope of the demand signal.

[0076] It should be noted that, in this embodiment, according to actual application needs, one or more of Q3, Q4, Q6, Q7, Q10, and Q11 may be selected to be retained or removed.

[0077] Furthermore, in this embodiment, the rising edge of the demand signal is fixed, and the falling edge slope of the demand signal can be adjusted by adjusting the capacitance value of the capacitor array 2221, so that the demand signal can pass the eye diagram test smoothly.

[0078] In this embodiment, the principle of adjusting the falling edge slope of the demand signal is as follows:

[0079] The capacitance value of the capacitor array 2221 can be adjusted by controlling the on and off of the switches in the capacitor adjustment circuit 250 through an external control signal. Specifically, when some switches in the capacitor adjustment circuit 250 are turned on, in the capacitor array 2221, the capacitors connected in series with the turned-on switches form a parallel relationship with each other, so by adjusting the number of switches turned on in the capacitor adjustment circuit 250, the capacitance value of the capacitor adjustment circuit 250 can be adjusted. For example, when the number of switches turned on in the capacitor adjustment circuit 250 increases, the number of capacitors connected in parallel in the capacitor array 2221 increases, and the capacitance value of the capacitor array 2221 increases; when the number of switches turned on in the capacitor adjustment circuit 250 decreases, the number of capacitors connected in parallel in the capacitor array 2221 decreases, and the capacitance value of the capacitor array decreases.

[0080] Since the larger the capacitance, the slower the voltage across the capacitor rises. When the capacitance value of the capacitor array 2221 is increased from C0 to C2, the gate-source voltage Vgs9 of the ninth MOS tube Q9 rises slower, and the gate-source voltage Vgs13 of the thirteenth MOS tube Q13 follows the gate-source voltage Vgs9 of the ninth MOS tube Q9 with a fixed voltage difference. At this time, when the capacitance value of the capacitor array 2221 is C2, the gate-source voltage Vgs13 of the thirteenth MOS tube Q13 rises more laggingly than when the capacitance value of the capacitor array 2221 is C0, that is, the conduction speed of the thirteenth MOS tube Q13 is slower. At the same time, when the capacitance value of the capacitor array 2221 is C2, the gate-source voltage Vgs13 of the thirteenth MOS tube Q13 is smaller, so that the on-resistance of the thirteenth MOS tube Q13 is larger, and then the discharge current of the load capacitor Cload is smaller, so that the discharge speed of the load capacitor Cload is smaller, that is, the falling edge slope of the demand signal is smaller.

[0081] like Figure 6 As shown, Figure 6 The waveform diagram of the edge adjustment circuit 200 of this embodiment adjusting the slope of the falling edge of the demand signal is shown. In the same cycle, the leftmost falling edge is the falling edge waveform of the demand signal when the capacitance value of the capacitor array 2221 is in the C0 state; the rightmost falling edge is the falling edge waveform of the demand signal when the capacitance value of the capacitor array 2221 is in the C2 state. Figure 5 It can be seen that when the capacitance value of the capacitor array 2221 increases from C0 to C2, the absolute value of the falling edge slope of the demand signal at the same time is smaller, that is, the falling edge waveform is smoother and the falling edge rate is slower, so that the eye diagram test can be passed more smoothly.

[0082] The edge adjustment circuit provided in the embodiment of the present application is provided with a state switching unit, a capacitor unit, a switch unit and a load circuit, and one end of the load circuit is used to output a demand signal. In this embodiment, by fixing the rising edge slope of the demand signal, the falling edge slope of the demand signal can be adjusted by adjusting the capacitance value of the capacitor array, so that the demand signal can pass the eye diagram test more smoothly.

[0083] like Figure 7 As shown, an embodiment of the present application further provides an integrated circuit 300, and the integrated circuit 300 includes the above-mentioned edge adjustment circuit.

[0084] The integrated circuit provided in the embodiment of the present application is provided with a state switching unit, a capacitor unit, a switch unit and a load capacitor, and one end of the load capacitor is used to output a demand signal. Among them, the state switching unit is connected to the capacitor unit and is used to connect to a preset power supply. The state switching unit is used to receive an input signal and control the preset power supply to charge the capacitor according to the level state of the input signal; the switch unit is connected to the preset power supply and the load capacitor, and is used to control the preset power supply to charge and discharge the load capacitor according to the charging state of the charging unit of the capacitor unit to control the edge slope of the demand signal. In this embodiment, the charging and discharging of the capacitor unit is controlled by the state switching unit, and the switch of the switch unit is controlled by the capacitor unit, so that the switching speed of the switch unit is adjustable, and the charging and discharging of the load capacitor is controlled by the switch unit, so that the charging and discharging speed of the load capacitor is adjustable, and the edge slope of the demand signal is related to the charging and discharging speed of the load capacitor. For example, when the discharge speed of the load capacitor is slower, the falling edge slope of the demand signal is smaller. Therefore, the edge adjustment circuit of this embodiment can adjust the edge slope of the demand signal, so that the demand signal of the integrated circuit can pass the eye diagram test smoothly.

[0085] like Figure 8 As shown, the embodiment of the present application further provides an electronic device 400, which includes a device body 410 and the above-mentioned integrated circuit 300. The integrated circuit 300 is disposed in the device body 410.

[0086] The electronic device provided in the embodiment of the present application is provided with a state switching unit, a capacitor unit, a switch unit and a load capacitor, and one end of the load capacitor is used to output a demand signal. Among them, the state switching unit is connected to the capacitor unit and is used to connect a preset power supply. The state switching unit is used to receive an input signal and control the preset power supply to charge the capacitor according to the level state of the input signal; the switch unit is connected to the preset power supply and the load capacitor, and is used to control the preset power supply to charge and discharge the load capacitor according to the charging state of the charging unit of the capacitor unit to control the edge slope of the demand signal. In this embodiment, the charge and discharge of the capacitor unit is controlled by the state switching unit, and the switch of the switch unit is controlled by the capacitor unit, so that the switching speed of the switch unit is adjustable, and the charge and discharge of the load capacitor is controlled by the switch unit, so that the charge and discharge speed of the load capacitor is adjustable, and the edge slope of the demand signal is related to the charge and discharge speed of the load capacitor. For example, when the discharge speed of the load capacitor is slower, the falling edge slope of the demand signal is smaller, so the edge adjustment circuit of this embodiment can adjust the edge slope of the demand signal, so that the demand signal of the electronic device can pass the eye diagram test smoothly.

[0087] The above are only preferred embodiments of the present application, and are not intended to limit the present application in any form. Although the present application has been disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technical personnel in the field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present application. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. An edge adjustment circuit, characterized in that: It includes a state switching unit, a capacitor unit, a switch unit and a load capacitor, wherein one end of the load capacitor is used to output a demand signal: The state switching unit is connected to the capacitor unit and is used to connect to a preset power source. The state switching unit is used to receive an input signal and control the preset power source to charge the capacitor unit according to a level state of the input signal. The input signal includes a first sub-input signal and a second sub-input signal, and the level states of the first sub-input signal and the second sub-input signal at the same time are opposite. The switch unit is connected to the preset power source and the load capacitor, and is used to control the preset power source to charge and discharge the load capacitor according to the charging state of the capacitor unit, so as to control the edge slope of the demand signal; The level state includes a first level state and a second level state, and the state switching unit is used to control the preset power supply to charge the capacitor unit according to the first level state of the input signal, so that the capacitor unit is in the first charging state; the state switching unit is also used to control the preset power supply to charge the capacitor unit according to the second level state of the input signal, so that the capacitor unit is in the second charging state; The switch unit includes a first switch branch and a second switch branch, the first switch branch is connected between the preset power supply and the load capacitor, the second switch branch is connected between the load capacitor and the ground, the first switch branch is used to be turned on when the capacitor unit is in the first charging state, so that the preset power supply charges the load capacitor to control the rising edge slope of the demand signal; the second switch branch is used to be turned on when the capacitor unit is in the second charging state, so that the load capacitor discharges to control the falling edge slope of the demand signal; The capacitor unit includes a first capacitor subunit and a second capacitor subunit, wherein the control end of the first switch branch is connected to the first capacitor subunit, and the control end of the second switch branch is connected to the second capacitor subunit; The state switching unit is used to control the preset power supply to charge the first capacitor subunit according to the first level state of the input signal, and the first switch branch is used to conduct the connection between the preset power supply unit and the load capacitor according to the charging state of the first capacitor subunit, so that the preset power supply charges the load capacitor; The state switching unit is further used to control the preset power supply to charge the second capacitor subunit according to the second level state of the input signal, and the second switch branch is used to conduct the connection between the load capacitor and the ground terminal according to the charging state of the second capacitor subunit, so as to discharge the load capacitor; The state switching unit comprises: A first switch, comprising a control end and two connecting ends, wherein one of the connecting ends is used to connect to the preset power supply and the other connecting end is grounded, the control end of the first switch is used to receive the first sub-input signal, and the two connecting ends of the first switch are connected in parallel with the first capacitor subunit; and A second switch, comprising a control end and two connecting ends, wherein one of the connecting ends is connected to the preset power supply and the other connecting end is grounded, the control end of the second switch is used to receive the second sub-input signal, and the two connecting ends of the second switch are connected in parallel with the second capacitor subunit; In the first level state, the first switch is used to be turned off according to the first sub-input signal, so that the preset power source charges the first capacitor subunit; in the second level state, the second switch is used to be turned off according to the second sub-input signal, so that the preset power source charges the second capacitor subunit; The edge regulation circuit also includes a fifth switch and a voltage-dividing resistor; the fifth switch includes a control end and two connection ends, one of the connection ends is connected to the preset power supply, the other connection end is connected to one end of the voltage-dividing resistor, the other end of the voltage-dividing resistor is grounded, the connection node between the fifth switch and the voltage-dividing resistor is connected to the control end of the second switch branch, and the control end of the fifth switch is connected to the second capacitor subunit; the fifth switch is used to be turned on according to the charging state of the second capacitor subunit to control the switching state of the second switch branch.

2. The edge adjustment circuit according to claim 1, characterized in that: In the first level state, the second switch is used to be turned on according to the second sub-input signal to prevent the preset power supply from charging the second capacitor sub-unit; In the second level state, the first switch is used to be turned on according to the first sub-input signal to prevent the preset power supply from charging the first capacitor sub-unit.

3. The edge adjustment circuit according to claim 1, characterized in that: The first switch branch comprises: The third switch comprises a control end and two connection ends, wherein one of the connection ends is connected to the preset power supply, and the other connection end is connected to one end of the load capacitor, and the control end of the third switch is connected to the first end of the first capacitor subunit.

4. The edge adjustment circuit according to claim 1, characterized in that: The second switch branch comprises: The fourth switch comprises a control end and two connection ends, wherein one of the connection ends is connected to one end of the load capacitor and the other connection end is connected to the ground end, and the control end of the fourth switch is connected to the first end of the second capacitor subunit.

5. The edge adjustment circuit according to any one of claims 1 to 4, characterized in that: The second capacitor subunit is a capacitor array, and the edge adjustment circuit also includes a capacitor adjustment circuit, which is connected to the capacitor array and is used to adjust the capacitance value of the capacitor array to adjust the conduction speed of the second switch branch and the falling edge slope of the demand signal.

6. The edge adjustment circuit according to any one of claims 1 to 4, characterized in that: The preset power supply includes a first current source module, a second current source module and a power supply module, wherein the first current source module is connected to the state switching unit to charge the first capacitor subunit; the second current source module is connected to the state switching unit to charge the second capacitor subunit; the power supply module is connected to the switch unit to charge the load capacitor.

7. The edge adjustment circuit according to any one of claims 1 to 4, characterized in that: The edge regulation circuit further includes a buffer circuit connected between the power supply unit and the load capacitor.

8. An integrated circuit, characterized in that: The invention comprises the edge adjustment circuit as described in any one of claims 1 to 7.

9. An electronic device, characterized in that: The device comprises a device body and the integrated circuit as claimed in claim 8 arranged in the device body.

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