Transmitter pre-emphasis crosstalk cancellation circuit, transmitter and communication system
By using a capacitor network module at the transmitting end to generate a reverse crosstalk cancellation signal and superimposing it on the victim signal, the problem of reduced main signal swing in the prior art is solved, and effective crosstalk cancellation in high-order modulation signaling and tightly coupled channels is achieved without increasing static power consumption.
Patent Information
- Application Number
- CN202410983268.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2044-07-22
AI Technical Summary
Existing transmitter crosstalk cancellation techniques, when using finite impulse response filters, result in a reduction in the main signal swing, making them unsuitable for high-order modulation signaling and tightly coupled channels.
A capacitor network module is used to generate a crosstalk cancellation signal that is opposite to the crosstalk signal. The victim signal and the crosstalk cancellation signal are superimposed at the transmitter end to cancel the crosstalk signal and avoid using driver slices to transmit the attacker signal.
It maintains the transmitter's main signal output swing without decreasing, improves the signal-to-noise ratio, and is suitable for high-order modulation signaling and tightly coupled channels, while without increasing additional static power consumption.
Smart Images
Figure CN119093950B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of integrated circuit technology, and in particular to a transmitter pre-emphasis crosstalk cancellation circuit, a transmitter, and a communication system. Background Technology
[0002] Currently, in wired communication systems, as integration increases, the distance between channels is gradually shortening. During signal transmission, crosstalk noise is generated by the overlapping and coupling of electromagnetic fields into other channels. Interference between signals from different channels leads to signal quality degradation and increased bit error rate, with far-end crosstalk playing a major role. To ensure signal quality and eliminate far-end crosstalk, current transmitter crosstalk cancellation typically employs finite impulse response (FIR) filters.
[0003] However, in the scheme of eliminating far-end crosstalk using finite impulse response filters, generating the elimination signal requires reducing the corresponding main signal swing, which is not suitable for high-order modulation signaling and tightly coupled channels.
[0004] Therefore, existing technologies still need to be improved and developed. Summary of the Invention
[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a transmitter pre-emphasis crosstalk cancellation circuit, transmitter and communication system to solve the problem that in the existing scheme of canceling far-end crosstalk using a finite impulse response filter, the generation of the cancellation signal requires a reduction in the corresponding main signal swing.
[0006] The technical solution of the present invention is as follows:
[0007] In a first aspect, the present invention provides a transmitter pre-emphasis crosstalk cancellation circuit, comprising: a capacitor network module, a driver slicing module, and an adjustable delay module; wherein...
[0008] The input terminal of the capacitor network module is connected to the adjustable delay module, and the output terminal of the capacitor network module is connected to the transmitter terminal of the transmitter. The capacitor network module is used to generate a crosstalk cancellation signal.
[0009] The adjustable delay module accesses attacker data and is connected to the capacitor network module. The adjustable delay module is used to adjust the position of the crosstalk cancellation signal.
[0010] The driver slicing module receives victim data and is connected to the transmitter. The driver slicing module is used to transmit victim signals and add the victim signals and the crosstalk cancellation signal at the transmitter.
[0011] In a further embodiment of the present invention, the capacitor network module includes a plurality of capacitors connected in parallel and a plurality of switching transistors; wherein,
[0012] The switching transistor is connected between the adjustable delay module and the capacitor;
[0013] The capacitor is connected between the switching transistor and the transmitter terminal.
[0014] In a further embodiment of the present invention, the amplitude of the crosstalk cancellation signal is proportional to the value of the capacitors connected in parallel.
[0015] In a further embodiment of the present invention, the driver slicing module includes: a first MOS transistor and a second MOS transistor; wherein,
[0016] The gate of the first MOSFET is connected to the gate of the second MOSFET, the drain of the first MOSFET is connected to the power supply voltage, and the source of the first MOSFET is connected to the drain of the second MOSFET.
[0017] The source of the second MOSFET is grounded;
[0018] The victim data is connected to the common terminal of the gate of the first MOS transistor and the gate of the second MOS transistor, and the common terminal of the source of the first MOS transistor and the drain of the second MOS transistor is connected to the transmitter terminal of the transmitter.
[0019] In a further embodiment of the present invention, the driver slicing module further includes: a third MOS transistor and a fourth MOS transistor; wherein,
[0020] The gate of the third MOS transistor is connected to a pull-up bias voltage, the drain of the third MOS transistor is connected to a power supply voltage, and the source of the third MOS transistor is connected to the drain of the first MOS transistor.
[0021] The gate of the fourth MOS transistor is connected to a pull-down bias voltage, the drain of the third MOS transistor is connected to the source of the second MOS transistor, and the source of the fourth MOS transistor is grounded.
[0022] In a further embodiment of the present invention, the driver slicing module further includes: a resistor; wherein,
[0023] One end of the resistor is connected to the common terminal of the source of the first MOS transistor and the drain of the second MOS transistor, and the other end of the resistor is connected to the transmitter terminal of the transmitter.
[0024] In a further embodiment of the present invention, the adjustable delay module includes: a first inverter, a second inverter, and a load capacitor; wherein,
[0025] The input terminal of the first inverter is connected to the attacker's data, the output terminal of the first inverter is connected to the input terminal of the second inverter, and the output terminal of the second inverter is connected to the capacitor network module;
[0026] One end of the load capacitor is connected to the output terminal of the first inverter and the input terminal of the second inverter, respectively, and the other end of the load capacitor is grounded.
[0027] In a further embodiment of the present invention, the adjustable delay module includes: a fifth MOSFET, a sixth MOSFET, a plurality of seventh MOSFETs, and a plurality of eighth MOSFETs; wherein,
[0028] The gate of the fifth MOS transistor is connected to the gate of the sixth MOS transistor, the drain of the fifth MOS transistor is connected to the source of the seventh MOS transistor, and the source of the fifth MOS transistor is connected to the drain of the sixth MOS transistor.
[0029] The source of the sixth MOS transistor is connected to the drain of the eighth MOS transistor;
[0030] The gate of the seventh MOS transistor is connected to the first enable signal, and the drain of the seventh MOS transistor is connected to the power supply voltage.
[0031] The gate of the eighth MOS transistor is connected to the second enable signal, and the source of the eighth MOS transistor is grounded.
[0032] The common terminal of the gate of the fifth MOS transistor and the gate of the sixth MOS transistor is connected to the victim data;
[0033] The common terminal of the source of the fifth MOS transistor and the drain of the sixth MOS transistor is connected to the capacitor network module.
[0034] In a second aspect, the present invention provides a transmitter that includes the transmitter pre-emphasis crosstalk cancellation circuit as described above.
[0035] Thirdly, the present invention provides a communication system comprising a transmitter as described above.
[0036] This invention provides a transmitter-side pre-emphasis crosstalk cancellation circuit, a transmitter, and a communication system. The transmitter-side pre-emphasis crosstalk cancellation circuit includes a capacitor network module, a driver slicing module, and an adjustable delay module. The input terminal of the capacitor network module is connected to the adjustable delay module, and the output terminal of the capacitor network module is connected to the transmitter's transmitting end. The capacitor network module generates a crosstalk cancellation signal. The adjustable delay module receives attacker data and is connected to the capacitor network module. The adjustable delay module adjusts the position of the crosstalk cancellation signal. The driver slicing module receives victim data and is connected to the transmitter's transmitting end. The driver slicing module transmits victim data and adds the victim signal and the crosstalk cancellation signal at the transmitter's transmitting end. This invention uses a capacitor network module to generate a crosstalk cancellation signal that is opposite to the crosstalk signal. At the transmitter's transmitting end, the victim signal and the crosstalk cancellation signal are superimposed to cancel the crosstalk signal. Compared with the traditional scheme based on finite impulse response filter to cancel far-end crosstalk, it does not require driver slicing to transmit the attacker signal, so that the output swing of the transmitter's main signal (i.e., the victim signal) will not be reduced. It can be applied to high-order modulation signaling and tightly coupled channels. Attached Figure Description
[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0038] Figure 1 This is a block diagram illustrating the principle of the pre-emphasis crosstalk cancellation circuit at the transmitter in this invention.
[0039] Figure 2 This is a schematic diagram of a traditional crosstalk cancellation structure.
[0040] Figure 3 This is a schematic diagram of the transmitter output waveforms of a conventional crosstalk cancellation structure and the crosstalk cancellation structure of the present invention in one embodiment of the present invention.
[0041] Figure 4 This is a circuit diagram of a driver slice in a conventional crosstalk cancellation structure according to one embodiment of the present invention.
[0042] Figure 5 This is a comparison diagram of the transmitter normalized output swing of the traditional crosstalk cancellation structure and the crosstalk cancellation structure of the present invention under different crosstalk intensities in one embodiment of the present invention.
[0043] Figure 6This is a circuit diagram of a capacitor network module in one embodiment of the present invention.
[0044] Figure 7 This is a circuit schematic diagram of the driver slicing module in one embodiment of the present invention.
[0045] Figure 8 This is a circuit diagram of an adjustable delay module in one embodiment of the present invention.
[0046] Figure 9 This is a circuit diagram of an adjustable delay module in another embodiment of the present invention.
[0047] The labels in the attached diagram are as follows: 100, capacitor network module; 200, driver slice module; 300, adjustable delay module. Detailed Implementation
[0048] This invention provides a transmitter pre-emphasis crosstalk cancellation circuit, a transmitter, and a communication system. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
[0049] In the implementation methods and claims, unless otherwise specified in the text, the terms "a," "an," "the," and "the" may also include plural forms. If the embodiments of the present invention involve descriptions of "first," "second," etc., such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.
[0050] It should be further understood that the term "comprising" as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when an element is referred to as "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements present. Furthermore, "connected" or "coupled" as used herein can include wireless connections or wireless coupling. The term "and / or" as used herein includes all or any unit and all combinations of one or more associated listed items.
[0051] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.
[0052] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.
[0053] Please also refer to Figures 1 to 9 The present invention provides a preferred embodiment of a transmitter pre-emphasis crosstalk cancellation circuit.
[0054] In some embodiments, such as Figure 1 As shown, this invention provides a transmitter pre-emphasis crosstalk cancellation circuit, comprising: a capacitor network module 100, a driver slicing module 200, and an adjustable delay module 300. The input terminal of the capacitor network module 100 is connected to the adjustable delay module 300, and the output terminal of the capacitor network module 100 is connected to the transmitter terminal of a transmitter. The capacitor network module 100 is used to generate a crosstalk cancellation signal. The adjustable delay module 300 receives attacker data and is connected to the capacitor network module 100. The adjustable delay module 300 is used to adjust the position of the crosstalk cancellation signal. The driver slicing module 200 receives victim data and is connected to the transmitter terminal of a transmitter. The driver slicing module 200 is used to transmit victim signals and add the victim signals and the crosstalk cancellation signal at the transmitter terminal of the transmitter.
[0055] In this embodiment, attacker data is transmitted via the adjustable delay module 300 and the capacitor network module 100, while victim data is transmitted via the driver slicing module 200, and a main signal, i.e., the victim signal, is output. The capacitor network module 100 can generate a crosstalk cancellation signal that is opposite to the crosstalk signal. The driver slicing module 200 can superimpose the victim signal and the crosstalk cancellation signal at the transmitter's transmitting end to cancel out the crosstalk signal.
[0056] The principle of superimposing the victim signal and the crosstalk cancellation signal at the transmitter's transmitting end to cancel out crosstalk signals is as follows: When the attacker signal Vin(t) is transmitted in a tightly coupled channel, the crosstalk signal generated in the adjacent channel can be expressed as:
[0057]
[0058] Among them, t p C represents the propagation time of a signal in the channel. m C t L m and L t These represent the mutual capacitance, total capacitance, mutual inductance, and total inductance per unit length of the channel, respectively. A coefficient K is used to characterize the impact of the channel's physical parameters on crosstalk. The final crosstalk signal is represented as a differential of the attacker's input signal, which can be canceled by generating an inverse signal at the victim's transmitter.
[0059] like Figure 2 As shown, Figure 2 This is a schematic diagram of a traditional crosstalk cancellation structure. A crosstalk cancellation signal is generated using a discrete-time differentiator. Specifically, this is achieved by subtracting the delay unit time t from the attacker's signal Vin(t). d The signal Vin(t-t) after d Finally, multiply by the coefficient α, t d The optimal setting is typically half the signal rise / fall time; an unreasonable t d This may result in overcompensation or undercompensation.
[0060] like Figure 3 As shown, Figure 3 The diagram shows the transmitter output waveforms of a traditional crosstalk cancellation structure and the crosstalk cancellation structure of this invention. Figure 4 This is a circuit schematic of a driver slice in a traditional crosstalk cancellation structure, where... Figure 4 The driver slice on the left corresponds to Figure 2 In driver slice 3, the input of the MOSFET is the victim data D0, and the middle driver slice is... Figure 2 The driver slice 1 in the diagram corresponds to the MOSFET input, which is the attacker's data D1. The driver slice on the right is... Figure 2 In the driver slice 2, the input of the MOSFET is the attacker's data D1 after a delay t. d The signal is then inverted. To match the impedance, the number of driver slices is constant. Traditional crosstalk cancellation architectures require using some driver slices to transmit the attacker signal to generate the crosstalk cancellation signal, resulting in a reduced swing of the transmitter's main signal output. Simultaneously, when the attacker signal does not change, a short-circuit current is generated from the power supply to ground, increasing power consumption. However, the crosstalk cancellation architecture proposed in this invention does not require consuming driver slices to transmit the attacker signal, and the transmitter's main signal output swing does not attenuate. Figure 5 As shown, there is no additional static power consumption overhead.
[0061] As can be seen, this invention uses a capacitor network module 100 to generate a crosstalk cancellation signal opposite to the crosstalk signal. At the transmitter's transmitting end, the victim signal and the crosstalk cancellation signal are superimposed to cancel the crosstalk signal. Compared to traditional schemes that use finite impulse response filters to cancel far-end crosstalk, this invention does not require driver slicing to transmit the attacker signal, ensuring that the output swing of the transmitter's main signal (i.e., the victim signal) does not decrease, thus guaranteeing signal quality, improving the signal-to-noise ratio, and without additional static power consumption. It is suitable for high-order modulation signaling and tightly coupled channels. Furthermore, this invention does not require an additional control delay unit, therefore eliminating the need for delay unit time t. d This variable reduces system complexity.
[0062] In some embodiments, such as Figure 6 As shown, the capacitor network module 100 includes several capacitors connected in parallel and several switching transistors. The switching transistors are connected between the adjustable delay module 300 and the capacitors; the capacitors are connected between the switching transistors and the transmitting end of the transmitter.
[0063] In this embodiment, the capacitor network module 100 consists of a multi-channel parallel array of switchable capacitors. Each capacitor C is connected in series with a switch S. When the switch S is turned on, the capacitor C connected to the switch S is active; when the switch S is turned off, the capacitor C connected to the switch S is inactive. The final effective capacitance value is the value of all the active capacitors connected in parallel. The crosstalk cancellation signal can be expressed as RCdVin(t) / dt, which is proportional to the capacitance value, meaning the amplitude of the crosstalk signal is proportional to the value of the capacitors connected in parallel. By connecting multiple small capacitors in parallel, the strength of the crosstalk cancellation signal can be adjusted. Therefore, by adjusting the capacitors effectively connected to the capacitor network module 100, it can adapt to channels with different coupling levels. The more capacitors there are, the more precise the adjustment settings.
[0064] In some embodiments, such as Figure 1 and Figure 7 As shown, the driver slicing module 200 includes a first MOSFET M1 and a second MOSFET M2. The gate of the first MOSFET M1 is connected to the gate of the second MOSFET M2; the drain of the first MOSFET M1 is connected to the power supply voltage VDD; the source of the first MOSFET M1 is connected to the drain of the second MOSFET M2; the source of the second MOSFET M2 is grounded; the common terminal of the gates of the first MOSFET M1 and the second MOSFET M2 is connected to the victim data D0; and the common terminal of the source of the first MOSFET M1 and the drain of the second MOSFET M2 is connected to the transmitter.
[0065] In this embodiment, the first MOS transistor M1 and the second MOS transistor M2 can transmit the victim signal. At the transmitter's transmitting end, the victim signal is superimposed with the crosstalk cancellation signal, thereby canceling the crosstalk signal. In one implementation, the first MOS transistor M1 can be a PMOS transistor, and the second MOS transistor M2 can be an NMOS transistor.
[0066] In some embodiments, such as Figure 2 and Figure 7 As shown, the driver slicing module 200 further includes a third MOSFET M3 and a fourth MOSFET M4. The gate of the third MOSFET M3 is connected to a pull-up bias voltage, the drain of the third MOSFET M3 is connected to a power supply voltage VDD, and the source of the third MOSFET M3 is connected to the drain of the first MOSFET M1. The gate of the fourth MOSFET M4 is connected to a pull-down bias voltage, the drain of the third MOSFET M3 is connected to the source of the second MOSFET M2, and the source of the fourth MOSFET M4 is grounded.
[0067] In this embodiment, the pull-up resistor can be adjusted by adjusting the pull-up bias voltage, and the pull-down resistor can be adjusted by adjusting the pull-down bias voltage, thereby adjusting the output impedance.
[0068] In some embodiments, such as Figure 2 and Figure 7 As shown, the driver slicing module 200 further includes a resistor R. One end of the resistor R is connected to the common terminal of the source of the first MOS transistor M1 and the drain of the second MOS transistor M2, and the other end of the resistor R is connected to the transmitter terminal of the transmitter.
[0069] In this embodiment, a resistor R is connected to the transmitting end of the transmitter. The resistor R can make the output impedance constant and the resistance fluctuation small.
[0070] In some embodiments, such as Figure 2 and Figure 8 As shown, the adjustable delay module 300 includes: a first inverter PINV1, a second inverter PINV2, and a load capacitor CD. The input terminal of the first inverter PINV1 is connected to attacker data D1, the output terminal of the first inverter PINV1 is connected to the input terminal of the second inverter PINV2, and the output terminal of the second inverter PINV2 is connected to the capacitor network module 100. One end of the load capacitor CD is connected to both the output terminal of the first inverter PINV1 and the input terminal of the second inverter PINV2, and the other end of the load capacitor CD is grounded.
[0071] In this embodiment, to ensure precise alignment between the crosstalk cancellation signal and the crosstalk signal, the position of the crosstalk cancellation signal needs to be adjusted. This embodiment adjusts the position of the crosstalk cancellation signal by changing the delay of the load capacitances of the first inverter PINV1 and the second inverter PINV2. A larger load capacitance CD results in a larger delay, and a smaller load capacitance CD results in a smaller delay. The delay corresponds to the position in the time domain, and the delay of the crosstalk cancellation signal can be adjusted by observing the results of crosstalk cancellation.
[0072] In some embodiments, such as Figure 2 and Figure 9 As shown, the adjustable delay module 300 includes: a fifth MOSFET M5, a sixth MOSFET M6, a plurality of seventh MOSFETs M7, and a plurality of eighth MOSFETs M8. The gate of the fifth MOSFET M5 is connected to the gate of the sixth MOSFET M6; the drain of the fifth MOSFET M5 is connected to the source of the seventh MOSFET M7; the source of the fifth MOSFET M5 is connected to the drain of the sixth MOSFET M6; the source of the sixth MOSFET M6 is connected to the drain of the eighth MOSFET M8; the gate of the seventh MOSFET M7 is connected to a first enable signal EN_N; the drain of the seventh MOSFET M7 is connected to a power supply voltage VDD; the gate of the eighth MOSFET M8 is connected to a second enable signal EN; the source of the eighth MOSFET M8 is grounded; the common terminal of the gates of the fifth MOSFET M5 and the sixth MOSFET M6 is connected to victim data D0; the common terminal of the source of the fifth MOSFET M5 and the drain of the sixth MOSFET M6 is connected to the capacitor network module 100.
[0073] In this embodiment, the first enable signal EN_N and the second enable signal EN are inverse signals, that is, the first enable signal EN_N is the inverse of the second enable signal EN (if one is 0, the other is 1). The seventh MOSFET M7 controls the pull-up current intensity, and the eighth MOSFET M8 controls the pull-down current intensity. By controlling the number of branches turned on by the seventh MOSFET M7 and the eighth MOSFET M8, the time extension range can be adjusted.
[0074] In one implementation, the seventh MOS transistor M7 is a PMOS transistor and the eighth MOS transistor M8 is an NMOS transistor. Since the first enable signal EN_N is the inverse of the second enable signal EN, for a pull-up PMOS transistor, it is enabled when the input is 0, and for a pull-down NMOS transistor, it is enabled when the input is 1. Therefore, the seventh MOS transistor M7 and the eighth MOS transistor M8 are enabled simultaneously.
[0075] In some embodiments, the present invention also provides a transmitter including a transmitter pre-emphasis crosstalk cancellation circuit as described above. Specific details of the transmitter pre-emphasis crosstalk cancellation circuit are omitted here.
[0076] In some embodiments, the present invention also provides a communication system comprising a transmitter as described above. Specifically, as described in a transmitter pre-emphasis crosstalk cancellation circuit, further details are omitted here.
[0077] In summary, the transmitter, transmitter, and communication system provided by this invention have the following beneficial effects:
[0078] A capacitor network module is used to generate a crosstalk cancellation signal that is opposite to the crosstalk signal. The victim signal and the crosstalk cancellation signal are superimposed at the transmitter end to cancel the crosstalk signal. Compared with the traditional scheme of canceling far-end crosstalk based on finite impulse response filter, it does not require the use of driver slicing module to transmit the attacker signal, so that the output swing of the transmitter's main signal (i.e. the victim signal) will not be reduced, and there is no additional static power consumption. It can be applied to high-order modulation signaling and tightly coupled channels.
[0079] No increase in static power consumption when the signal does not change;
[0080] By connecting multiple small capacitors in parallel, the strength of the crosstalk cancellation signal can be adjusted. Therefore, by adjusting the capacitors effectively connected to the capacitor network module, it is possible to adapt to channels with different coupling levels.
[0081] It should be understood that the application of the present invention is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.
Claims
1. A transmitter pre-emphasis crosstalk cancellation circuit, characterized in that, include: Capacitor network module, driver slicing module, and adjustable delay module; among which, The input terminal of the capacitor network module is connected to the adjustable delay module, and the output terminal of the capacitor network module is connected to the transmitter terminal of the transmitter. The capacitor network module is used to generate a crosstalk cancellation signal. The adjustable delay module accesses attacker data and is connected to the capacitor network module. The adjustable delay module is used to adjust the position of the crosstalk cancellation signal. The driver slicing module receives victim data and is connected to the transmitter. The driver slicing module is used to transmit victim signals and add the victim signals and the crosstalk cancellation signal at the transmitter.
2. The transmitter pre-emphasis crosstalk cancellation circuit according to claim 1, characterized in that, The capacitor network module includes several capacitors connected in parallel and several switching transistors; wherein, The switching transistor is connected between the adjustable delay module and the capacitor; The capacitor is connected between the switching transistor and the transmitter terminal.
3. The transmitter pre-emphasis crosstalk cancellation circuit according to claim 2, characterized in that, The amplitude of the crosstalk cancellation signal is proportional to the value of the capacitors connected in parallel.
4. The transmitter pre-emphasis crosstalk cancellation circuit according to claim 1, characterized in that, The driver slicing module includes: a first MOS transistor and a second MOS transistor; wherein... The gate of the first MOSFET is connected to the gate of the second MOSFET, the drain of the first MOSFET is connected to the power supply voltage, and the source of the first MOSFET is connected to the drain of the second MOSFET. The source of the second MOSFET is grounded; The victim data is connected to the common terminal of the gate of the first MOS transistor and the gate of the second MOS transistor, and the common terminal of the source of the first MOS transistor and the drain of the second MOS transistor is connected to the transmitter terminal of the transmitter.
5. The transmitter pre-emphasis crosstalk cancellation circuit according to claim 4, characterized in that, The driver slicing module further includes: a third MOS transistor and a fourth MOS transistor; wherein... The gate of the third MOS transistor is connected to a pull-up bias voltage, the drain of the third MOS transistor is connected to a power supply voltage, and the source of the third MOS transistor is connected to the drain of the first MOS transistor. The gate of the fourth MOS transistor is connected to a pull-down bias voltage, the drain of the third MOS transistor is connected to the source of the second MOS transistor, and the source of the fourth MOS transistor is grounded.
6. The transmitter pre-emphasis crosstalk cancellation circuit according to claim 4, characterized in that, The driver slicing module further includes: a resistor; wherein... One end of the resistor is connected to the common terminal of the source of the first MOS transistor and the drain of the second MOS transistor, and the other end of the resistor is connected to the transmitter terminal of the transmitter.
7. The transmitter pre-emphasis crosstalk cancellation circuit according to claim 1, characterized in that, The adjustable delay module includes: a first inverter, a second inverter, and a load capacitor; wherein... The input terminal of the first inverter is connected to the attacker's data, the output terminal of the first inverter is connected to the input terminal of the second inverter, and the output terminal of the second inverter is connected to the capacitor network module; One end of the load capacitor is connected to the output terminal of the first inverter and the input terminal of the second inverter, respectively, and the other end of the load capacitor is grounded.
8. The transmitter pre-emphasis crosstalk cancellation circuit according to claim 1, characterized in that, The adjustable delay module includes: a fifth MOSFET, a sixth MOSFET, several seventh MOSFETs, and several eighth MOSFETs; wherein... The gate of the fifth MOS transistor is connected to the gate of the sixth MOS transistor, the drain of the fifth MOS transistor is connected to the source of the seventh MOS transistor, and the source of the fifth MOS transistor is connected to the drain of the sixth MOS transistor. The source of the sixth MOS transistor is connected to the drain of the eighth MOS transistor; The gate of the seventh MOS transistor is connected to the first enable signal, and the drain of the seventh MOS transistor is connected to the power supply voltage. The gate of the eighth MOS transistor is connected to the second enable signal, and the source of the eighth MOS transistor is grounded. The common terminal of the gate of the fifth MOS transistor and the gate of the sixth MOS transistor is connected to the victim data; The common terminal of the source of the fifth MOS transistor and the drain of the sixth MOS transistor is connected to the capacitor network module.
9. A transmitter, characterized in that, Includes the transmitter pre-emphasis crosstalk cancellation circuit as described in any one of claims 1-8.
10. A communication system, characterized in that, Including the transmitter as described in claim 9.
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