Slope detector, adaptive equalization circuit and electronic device
By setting the inductor module and the capacitor module in the slope detector to resonate, the problem that traditional slope detectors are difficult to measure the slope of high-speed signals is solved, and accurate detection of high-speed signals and expansion of signal bandwidth is achieved.
Patent Information
- Application Number
- CN202510069334.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2025-05-23
AI Technical Summary
It is difficult for traditional slope detectors to accurately measure the slope of high-speed signals because when the signal frequency is too high, overlap between the charging time of the capacitor and the discharge time, resulting in detection failure.
A slope detector is designed to resonate the inductor module between the transistor and the power supply voltage connection terminal, thereby pushing the pole at the voltage output terminal to a higher frequency and expanding the signal bandwidth.
Accurate slope detection of high-speed signals is realized, the signal bandwidth of the slope detector is expanded, and the working performance of the adaptive equalization circuit is improved.
Smart Images
Figure CN120034159A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of electronic and electrical technology, and in particular to a slope detector, an adaptive equalization circuit and an electronic device. Background Art
[0002] In signal and communication systems, adaptive equalization circuits are often used to compensate for signal distortion caused during transmission and to help the circuit automatically adjust to the changing signal characteristics. For adaptive equalization circuits, the slope of the signal (i.e., the rate of change of the signal) is a very important parameter because the rate of change of the signal may directly affect the performance of the circuit (such as the quality of data transmission, the stability of the signal, etc.). The slope detector usually implements the slope detection function by observing the charge and discharge time of a fixed capacitor. The core idea of this process is that the slope of the input signal determines the speed at which the capacitor charges and discharges. If the rate of change of the input signal is high, the capacitor will charge and discharge faster; if the rate of change is low, the charge and discharge time will be longer. The charge and discharge time of the capacitor is inversely proportional to the slope of the input signal, so by monitoring the speed at which the capacitor charges and discharges, the slope detector can indirectly measure the slope of the signal.
[0003] However, it is difficult for a conventional slope detector to measure the slope of a high-speed signal. This is because when the signal frequency is too high, the charging time and discharging time of the capacitor used to measure the slope will overlap, causing the slope detector to be unable to accurately measure the signal slope. Summary of the invention
[0004] The present application provides a slope detector, an adaptive equalization circuit and an electronic device, which can help expand the signal bandwidth of the slope detector.
[0005] The present application provides a slope detector, the slope detector having a first voltage input terminal, a second voltage input terminal and a voltage output terminal, and the slope detector includes:
[0006] a first transistor and a second transistor, wherein a gate of the first transistor is connected to the first voltage input terminal, a gate of the second transistor is connected to the second voltage input terminal, and the first transistor and the second transistor have an equal channel width-to-length ratio;
[0007] a current source module, wherein a positive electrode of the current source module is respectively connected to the first electrode of the first transistor, the first electrode of the second transistor and the voltage output terminal, and a negative electrode of the current source module is connected to the common terminal of the slope detector;
[0008] a first inductor module, wherein a first end of the first inductor module is connected to the second electrode of the first transistor, and a second end of the first inductor module is connected to a power supply voltage connection end of the slope detector;
[0009] a second inductor module, wherein a first end of the second inductor module is connected to the second electrode of the second transistor, and a second end of the second inductor module is connected to the power supply voltage connection terminal; and
[0010] A capacitor module, two ends of which are connected to the voltage output end and the common end respectively;
[0011] The first electrode and the second electrode are respectively one of a source electrode and a drain electrode.
[0012] In some possible implementations, the first inductor module includes a third transistor and a first resistor, a gate of the third transistor is connected to a first end of the first resistor, a second end of the first resistor is respectively connected to a second electrode of the third transistor and a first end of the first inductor module, and a first electrode of the third transistor is connected to a second end of the first inductor module;
[0013] The second inductor module includes a fourth transistor and a second resistor, the gate of the fourth transistor is connected to the first end of the second resistor, the second end of the second resistor is respectively connected to the second electrode of the fourth transistor and the first end of the second inductor module, and the first electrode of the fourth transistor is connected to the second end of the second inductor module.
[0014] In some possible implementations, the equivalent inductance Z of the first inductor module and the second inductor module is o The following configuration is used to resonate with the capacitor module:
[0015]
[0016] where r ds is the gate-source resistance value of the third transistor and the fourth transistor, s is a complex frequency variable, R L is the resistance value of the first resistor and the second resistor, C gs is the gate-source capacitance of the third transistor and the fourth transistor, g m is the transconductance of the third transistor and the fourth transistor.
[0017] In some possible implementations, the equivalent inductances of the first inductor module and the second inductor module are configured by setting the channel width-to-length ratios of the third transistor and the fourth transistor and the resistance values of the first resistor and the second resistor.
[0018] In some possible implementations, the third transistor and the fourth transistor are configured to operate in a saturation region.
[0019] In some possible implementations, the first inductor module and the second inductor module are configured to increase an output signal bandwidth of the slope detector by generating resonance with a capacitive circuit structure including the capacitor module.
[0020] In some possible implementations, at least part of the capacitance value of the capacitor module is provided by a parasitic capacitance at the voltage output terminal.
[0021] The present application also provides an adaptive equalization circuit, wherein the adaptive equalization circuit includes at least one slope detector of any one of the above.
[0022] In some possible implementations, the adaptive equalization circuit further includes an equalization filter and / or a limiting amplifier connected to the slope detector.
[0023] The present application also provides an electronic device, which includes at least one adaptive equalization circuit of any one of the above.
[0024] In an embodiment of the present application, the first transistor, the second transistor, the current source module and the capacitor module of the slope detector form a coupled differential pair for detecting the slope of the input signal, which outputs corresponding pulse signals at the rising edge and the falling edge of the input signal, and the pulse amplitude of the pulse signal varies with the charging time of the capacitor module. Therefore, when the slope of the input signal is larger, the pulse amplitude of the output signal is smaller, and the slope of the input signal is detected by detecting the pulse amplitude of the output signal; on this basis, the first inductor module and the second inductor module arranged between the transistor and the power supply voltage connection terminal can use their own inductive impedance to resonate with the capacitor module, so that the pole at the voltage output terminal can be pushed to a higher frequency, thereby helping to expand the signal bandwidth of the slope detector, helping to realize a slope detector and an adaptive equalization circuit that can process high-speed signals and help improve working performance.
[0025] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.
[0027] Figure 1 is a structural block diagram of a slope detector provided in an embodiment of the present application;
[0028] Figure 2 is a circuit structure diagram of another slope detector provided in an embodiment of the present application;
[0029] Figure 3is a circuit structure diagram of another slope detector provided in an embodiment of the present application;
[0030] Figure 4 is an equivalent circuit diagram of an inductor module in a slope detector provided in an embodiment of the present application;
[0031] Figure 5 is a structural block diagram of an adaptive equalization circuit provided in an embodiment of the present application;
[0032] Figure 6 It is a structural block diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION
[0033] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.
[0034] The terms used in the embodiments of the present disclosure are only used to explain the embodiments of the present disclosure, and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second", "third" and similar words used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate a quantitative limit, but indicate that there is at least one. Similar words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Similar words such as "connect" or "connected" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.
[0035] Figure 1 is a structural block diagram of a slope detector provided in an embodiment of the present application. Figure 1 The slope detector has a first voltage input terminal Vin+, a second voltage input terminal Vin− and a voltage output terminal Vout, and includes a first transistor M1, a second transistor M2, a current source module 11, a first inductor module 12, a second inductor module 13 and a capacitor module 14.
[0036] like Figure 1As shown, the gate of the first transistor M1 is connected to the first voltage input terminal Vin+, the gate of the second transistor M2 is connected to the second voltage input terminal Vin-, the positive electrode of the current source module 11 is respectively connected to the first electrode of the first transistor M1, the first electrode of the second transistor M2 and the voltage output terminal Vout, the negative electrode of the current source module 11 is connected to the common terminal of the slope detector, the first end of the first inductor module 12 is connected to the second electrode of the first transistor M1, the second end of the first inductor module 12 is connected to the power supply voltage connection terminal VDD of the slope detector, the first end of the second inductor module 13 is connected to the second electrode of the second transistor M2, the second end of the second inductor module 13 is connected to the power supply voltage connection terminal VDD, and the two ends of the capacitor module 14 are respectively connected to the voltage output terminal Vout and the common terminal. Wherein, the first transistor M1 and the second transistor M2 have equal channel width-to-length ratios, and the first electrode of the transistor and the second electrode of the transistor are respectively one of the source electrode and the drain electrode of the transistor; in one example, the first electrode is the source electrode and the second electrode is the drain electrode; in another example, the first electrode is the drain electrode and the second electrode is the source electrode.
[0037] In the embodiment of the present application, the first transistor M1, the second transistor M2, the current source module 11 and the capacitor module 14 of the slope detector form a coupled differential pair for detecting the slope of the input signal (i.e., the signal input through the first voltage input terminal Vin+ and the second voltage input terminal Vin-), which outputs corresponding pulse signals at the rising edge and the falling edge of the input signal, and the pulse amplitude of the pulse signal varies with the charging time of the capacitor module 14, so when the slope of the input signal is large, the pulse amplitude of the output signal (i.e., the signal output at the voltage output terminal Vout) is small, and the slope of the input signal is detected by detecting the pulse amplitude of the output signal; on this basis, the first inductor module 12 and the second inductor module 13 arranged between the first transistor M1 / the second transistor M2 and the power supply voltage connection terminal VDD can use their own inductive impedance to resonate with the capacitor module 14, so that the pole at the voltage output terminal Vout can be pushed to a higher frequency, thereby helping to expand the signal bandwidth of the slope detector, helping to realize a slope detector and an adaptive equalization circuit that can process high-speed signals, and helping to improve their working performance.
[0038] It should be noted that the slope detector can be, for example, a separate component installed in an electronic device or on a circuit board, or it can be combined with other circuits to form an integrated circuit board (such as a PCB board), or it can be a part of a circuit product with certain functions (in this case, the slope detector can share at least some circuit components with other circuit parts, and there may or may not be a clear area division between it and other circuit parts). The embodiments of the present application are not limited to this.
[0039] It should also be noted that the first transistor and the second transistor can be any type of transistor, such as CMOS (complementary metal oxide semiconductor) transistor, MOSFET (Metal Oxide Semiconductor Field Effect Transistor), IGBT (Insulate-Gate Bipolar Transistor), etc. In order to form a differential pair and have better differential performance, the first transistor and the second transistor can have the same characteristics in other aspects in addition to having equal channel width-to-length ratio; for example, the first transistor and the second transistor can be made into mirror-image transistors, or formed on the same substrate with the same process, size and manufacturing specifications, or using devices of the same model, batch and device parameters, etc.
[0040] It should also be noted that the current source module refers to any circuit structure that can supply a constant current between the positive and negative electrodes. It can select any constant current source circuit or module, or it can sample any circuit structure that can achieve the same function to achieve it. The embodiment of the present application does not limit this. The capacitance module value is a circuit structure that provides capacitive impedance between the two ends. It may include or not include any form of capacitor, and its capacitance value may be partially or completely provided by the parasitic capacitance between the conductor structures in the circuit (i.e., the parasitic capacitance at the voltage output terminal Vout). The embodiment of the present application does not limit this.
[0041] Figure 2 is a schematic diagram of the circuit structure of another slope detector provided in an embodiment of the present application. Figure 2 As an example, the function of the current source module 11 is realized by a constant current source, the capacitance value of the capacitor module 14 is entirely provided by the parasitic capacitor Cs at the voltage output terminal Vout (i.e., the parasitic capacitor generated at the voltage output terminal Vout is used as the capacitor module 14), and the first inductor module 12 and the second inductor module 13 respectively include a first inductor L1 and a second inductor L2, and both use coil inductance as an example.
[0042] based on Figure 2In the circuit structure shown, the parasitic capacitor Cs, the constant current source, the first transistor M1 and the second transistor M2 form a source-coupled differential pair, so that the voltage waveform of the output signal at the voltage output terminal Vout will have a negative pulse waveform at the rising and falling edges of the input signal between the first voltage input terminal Vin+ and the second voltage input terminal Vin-; when the input signal slope is small, that is, the signal edge jump is slow, the charging time of the parasitic capacitor Cs becomes longer, but the constant tail current provided by the constant current source for the charging and discharging current remains unchanged, so the output pulse amplitude at this time is larger; and when the input signal slope is large, the output pulse amplitude is smaller due to the shortened charging time. Therefore, by detecting the pulse amplitude of the output signal, the detection of the slope of the rising and falling edges of the input signal can be achieved.
[0043] However, for the slope detector that does not include the first inductor L1 and the second inductor L2 (i.e., the circuit result in which the first inductor L1 and the second inductor L2 are replaced by a wire or a resistor), when the input signal has a frequency of more than 10 GHz, due to the limitations of the process and the device, the charging period and the discharging period of the parasitic capacitor Cs overlap with each other and the slope detection fails (i.e., the slope detector bandwidth is insufficient). In the embodiment of the present application, the first inductor L1 and the second inductor L2 can increase the output signal bandwidth of the slope detector by resonating with the capacitive circuit structure (such as the parasitic capacitor Cs) including the capacitor module 14, i.e., the inductor peaking technology.
[0044] Since the traditional amplifier uses a pure resistance load network, the output end is an RC network (i.e., a capacitive load network); in this regard, referring to the embodiment of the present application, an inductor can be used to replace the pure resistor. As the frequency continues to increase, the inductive impedance will continue to increase and resonate with the capacitive circuit structure at the output end, pushing the pole of the output end to a higher frequency, thereby achieving the purpose of bandwidth expansion, so that the slope detector can still maintain a high accuracy and detection precision when processing the slope detection of high-frequency signals. Figure 2 Taking the common source amplifier shown in FIG. 1 as an example, the inductor peaking structure can generally be connected in series with the inductor at the load resistor end, that is, Figure 2 The first inductor L1 and the second inductor L2 in the.
[0045] Figure 3 is a schematic diagram of the circuit structure of another slope detector provided in an embodiment of the present application. Figure 3 ,and Figure 2 The difference is, Figure 3The first inductor module 12 and the second inductor module 13 adopt an active inductor structure - the first inductor module 12 includes a third transistor M3 and a first resistor R1, the gate of the third transistor M3 is connected to the first end of the first resistor R1, the second end of the first resistor R1 is respectively connected to the second electrode of the third transistor M3 and the first end of the first inductor module 12, and the first electrode of the third transistor M3 is connected to the second end of the first inductor module 12; the second inductor module 13 includes a fourth transistor M4 and a second resistor R2, the gate of the fourth transistor M4 is connected to the first end of the second resistor R2, the second end R2 of the second resistor is respectively connected to the second electrode of the fourth transistor M4 and the first end of the second inductor module 13, and the first electrode of the fourth transistor M4 is connected to the second end of the second inductor module 13.
[0046] Figure 2 The slope detector shown can use two coil inductors to expand the bandwidth, but the use of inductive components such as coil inductors will occupy a large design space and bring about a large circuit power consumption, which is not conducive to the integration and lightness of the product. Figure 3 The slope detector shown uses an active inductor instead of the coil inductance, and the manufacture and connection of the third transistor M3, the first resistor R1, the fourth transistor M4 and the second resistor R2 can be easily integrated with the first transistor M1, the first transistor M2 and other circuit structures (that is, formed together using the same or similar process and manufacturing process), thereby expanding the bandwidth of the slope detector in a more lightweight and easy-to-integrate manner, which helps to improve the performance of the slope detector and the adaptive equalization circuit and reduce its product weight and volume.
[0047] Figure 4 is an equivalent circuit diagram of an inductor module in a slope detector provided in an embodiment of the present application. Figure 4 ,exist Figure 3 In the active inductor structure shown, its impedance (or equivalent inductive reactance) Z can be expressed by its equivalent circuit o ——Connect the power supply voltage VDD to the output terminal of the active inductor V O between, Figure 3 The circuit structure consisting of a transistor and a resistor can be equivalent to Figure 4 The circuit structure shown in the figure, where C gs is the gate-source capacitance of the third transistor M3 and the fourth transistor M4, R L is the resistance value of the first resistor R1 and the second resistor R2, r ds is the gate-source resistance of the third transistor M3 and the fourth transistor M4, g m is the transconductance of the third transistor M3 and the fourth transistor M4, V gsis the gate-source voltage of the third transistor M3 and the fourth transistor M4, Figure 4 Medium m ×V gs Represents a small signal current source corresponding to the third transistor M3 or the fourth transistor M4.
[0048] based on Figure 4 The circuit structure shown in FIG. 1 can be expressed by the following formula to express the equivalent inductive reactance Z of the first inductor module 12 and the second inductor module 13: o :
[0049]
[0050] That is, for a known target bandwidth frequency, the equivalent inductive reactance Z of the first inductor module 12 and the second inductor module 13 can be configured with reference to the above formula: o , so that the first inductor module 12 and the second inductor module 13 can resonate with the capacitor module 14 in an expected manner so that the slope detector can maintain normal operation at the target bandwidth frequency.
[0051] In one example, the gate-source capacitance value C gs , gate-source resistance value r ds and transconductance g m The configuration can be achieved by setting the channel width-to-length ratio of the transistor under the premise of fixing other parameters of the transistor; in this way, the equivalent inductance of the first inductor module and the second inductor module is configured by setting the channel width-to-length ratio of the third transistor M3 and the fourth transistor M4 and the resistance values of the first resistor R1 and the second resistor R2, so as to achieve the required target bandwidth frequency according to the above formula.
[0052] Furthermore, in one example, Figure 3 The slope detector shown can make the third transistor M3 and the fourth transistor M4 work in the saturation region by configuring the power supply voltage value provided by the power supply voltage connection terminal VDD, so as to realize the function of the above-mentioned active inductor in a more stable and expected manner. Of course, in order to configure the third transistor M3 and the fourth transistor M4 to work in the saturation region, appropriate device types and parameters can also be selected to form the third transistor M3 and the fourth transistor M4 at the same time, and the embodiment of the present application does not limit this.
[0053] Figure 5 is a structural block diagram of an adaptive equalization circuit provided in an embodiment of the present application. Figure 5The adaptive equalization circuit includes a slope detector 10 and an equalization filter 20, wherein the slope detector 10 can be implemented by any of the above-mentioned slope detectors, and the slope detector 10 is connected to the equalization filter 20 to provide the equalization filter 20 with a slope detection result of the input signal, so that the equalization filter 20 can perform equalization filtering on the input signal in an expected manner (parameters including signal slope data provided by the slope detector 10 will be used in the filtering control process), for example, to achieve a function of adaptive equalization output for the input digital signal.
[0054] In yet another example, Figure 5 The equalizing filter 20 in the adaptive equalizing circuit shown can be replaced by a limiting amplifier or a combination of an equalizing filter and a limiting amplifier, so that the slope detector 10 provides the slope detection result of the input signal to the equalizing filter and / or the limiting amplifier in the adaptive equalizing circuit, thereby enabling the adaptive equalizing circuit to achieve the desired function.
[0055] Figure 6 is a structural block diagram of an electronic device provided in an embodiment of the present application. Figure 6 The electronic device includes an adaptive equalization circuit 100 and a processor 200. The adaptive equalization circuit 100 is any one of the above-mentioned adaptive equalization circuits, and the adaptive equalization circuit 100 is connected to the processor 200.
[0056] It should be noted that the electronic device can be, for example, any signal system device, such as a signal filter, a signal interface, a signal converter, a signal generator, a data transceiver, etc., or any application device including a signal system device, such as a whole machine controller, a battery management system, an electric vehicle, etc. In different implementations, the processor 200 can be implemented in different forms, such as a controller or a single-chip microcomputer that receives digital signals, a main control module of a vehicle controller, and so on.
[0057] In one example, the main control module of the vehicle controller includes a processor and a memory. Among them, the processor may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor can be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the vehicle display screen. In some embodiments, the processor may also include an AI (Artificial Intelligence) processor, which is used to process computing operations related to machine learning. The memory may include one or more computer-readable storage media, which may be non-transitory. The memory may also include high-speed random access memory and non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices.
[0058] As another example, in any implementation of the embodiments of the present application, the processor 200 may include one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components.
[0059] It can be seen that in the adaptive equalization circuit, electronic device and slope detector of the embodiments of the present application, the first transistor, the second transistor, the current source module and the capacitor module form a coupled differential pair for detecting the slope of the input signal, which outputs corresponding pulse signals at the rising edge and the falling edge of the input signal, and the pulse amplitude of the pulse signal varies with the charging time of the capacitor module. Therefore, when the slope of the input signal is larger, the pulse amplitude of the output signal is smaller, and the slope of the input signal is detected by detecting the pulse amplitude of the output signal; on this basis, the first inductor module and the second inductor module arranged between the transistor and the power supply voltage connection terminal can use their own inductive impedance to resonate with the capacitor module, so that the pole at the voltage output terminal can be pushed to a higher frequency, thereby helping to expand the signal bandwidth of the slope detector, helping to realize a slope detector and an adaptive equalization circuit that can process high-speed signals and help improve working performance.
[0060] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present application shall be included in the protection scope of the present application.
Claims
1. A slope detector, characterized in that: The slope detector has a first voltage input terminal, a second voltage input terminal and a voltage output terminal, and the slope detector includes: a first transistor and a second transistor, wherein a gate of the first transistor is connected to the first voltage input terminal, a gate of the second transistor is connected to the second voltage input terminal, and the first transistor and the second transistor have an equal channel width-to-length ratio; a current source module, wherein a positive electrode of the current source module is respectively connected to the first electrode of the first transistor, the first electrode of the second transistor and the voltage output terminal, and a negative electrode of the current source module is connected to the common terminal of the slope detector; a first inductor module, wherein a first end of the first inductor module is connected to the second electrode of the first transistor, and a second end of the first inductor module is connected to a power supply voltage connection end of the slope detector; a second inductor module, wherein a first end of the second inductor module is connected to the second electrode of the second transistor, and a second end of the second inductor module is connected to the power supply voltage connection terminal; and A capacitor module, two ends of which are connected to the voltage output end and the common end respectively; The first electrode and the second electrode are respectively one of a source electrode and a drain electrode.
2. The slope detector according to claim 1, characterized in that The first inductor module includes a third transistor and a first resistor, the gate of the third transistor is connected to the first end of the first resistor, the second end of the first resistor is respectively connected to the second electrode of the third transistor and the first end of the first inductor module, and the first electrode of the third transistor is connected to the second end of the first inductor module; The second inductor module includes a fourth transistor and a second resistor, the gate of the fourth transistor is connected to the first end of the second resistor, the second end of the second resistor is respectively connected to the second electrode of the fourth transistor and the first end of the second inductor module, and the first electrode of the fourth transistor is connected to the second end of the second inductor module.
3. The slope detector according to claim 2, characterized in that The equivalent inductance Z of the first inductor module and the second inductor module is o The following configuration is used to resonate with the capacitor module: where r ds is the gate-source resistance value of the third transistor and the fourth transistor, s is a complex frequency variable, R L is the resistance value of the first resistor and the second resistor, C gs is the gate-source capacitance of the third transistor and the fourth transistor, g m is the transconductance of the third transistor and the fourth transistor.
4. The slope detector according to claim 3, characterized in that The equivalent inductance Z of the first inductor module and the second inductor module is o The configuration is performed by setting the channel width-to-length ratio of the third transistor and the fourth transistor and the resistance values of the first resistor and the second resistor.
5. The slope detector according to claim 2, characterized in that The third transistor and the fourth transistor are configured to operate in a saturation region.
6. The slope detector according to any one of claims 1 to 5, characterized in that The first inductor module and the second inductor module are configured to increase an output signal bandwidth of the slope detector by resonating with a capacitive circuit structure including the capacitor module.
7. The slope detector according to any one of claims 1 to 5, characterized in that At least part of the capacitance value of the capacitor module is provided by the parasitic capacitance at the voltage output terminal.
8. An adaptive equalization circuit, characterized in that: The adaptive equalization circuit comprises a slope detector as claimed in any one of claims 1 to 7.
9. The adaptive equalization circuit according to claim 8, characterized in that: The adaptive equalization circuit further comprises an equalization filter and / or a limiting amplifier connected to the slope detector.
10. An electronic device, characterized in that: The electronic device comprises at least one adaptive equalization circuit as claimed in claim 8 or 9.