Signal amplitude and slope adjustable OOK modulator and use method thereof

Abstract

The invention provides an OOK modulator capable of adjusting signal amplitude and slope and a use method thereof, and relates to the technical field of integrated circuits, the OOK modulator comprises a control logic circuit, a modulator circuit, an input signal port and an output signal port; the control logic circuit is used for processing an input signal and generating a signal for controlling the modulator circuit; the modulator circuit controls charging and discharging of a capacitor to form specific trapezoidal waves by generating reference current and clamping charging and discharging point voltage, and OOK modulation output signals with adjustable amplitude and slope are generated through envelope shaping. Compared with a traditional OOK modulation signal, the output signal has an amplitude slope adjustable function, and dynamic power consumption and external radiation can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of integrated circuits, and in particular to an OOK modulator with adjustable signal amplitude and slope and a method for using the same. Background Art

[0002] The principle of OOK (on-off keying) is to control the carrier amplitude through binary signals, switching between "on (non-zero amplitude)" and "off (zero amplitude)" states to achieve information transmission. OOK modulation modulates a low-frequency digital signal onto a high-frequency carrier through a logical relationship. When the low-frequency digital signal is logically high, the output is a low level, and when it is logically low, the envelope signal of the high-frequency carrier is output. However, the output signal amplitude of conventional OOK modulation is uncontrollable. The high level is usually the power supply voltage, which is not conducive to low-power applications. The rise and fall slopes are also uncontrollable, and the edges are usually as steep as square waves. During transmission, it generates significant radiation, which can adversely affect other circuits or modules in the system.

[0003] like Figure 1 Figure 2 shows a signal diagram of a traditional OOK modulator. The inputs are a low-frequency signal (IN) and a high-frequency carrier signal (OSC), and the output is a modulated signal (OUT). The amplitude of the output modulated signal is from GND to VDD, and the signal edge slope is still very steep. When this signal is transmitted, it not only consumes a lot of dynamic power but also generates significant external radiation.

[0004] Therefore, an OOK modulator with adjustable amplitude and slope is needed to optimize power consumption and radiation by adjusting the amplitude and slope for different occasions. Summary of the Invention

[0005] In view of the defects in the prior art, the present invention provides an OOK modulator with adjustable signal amplitude and slope and a method for using the same.

[0006] According to the present invention, an OOK modulator with adjustable signal amplitude and slope and a method for using the same are provided as follows: In a first aspect, an OOK modulator with adjustable signal amplitude and slope is provided, comprising: a control logic circuit, a modulator circuit, an input signal port, and an output signal port; The control logic circuit is used to process the input signal and generate a signal for controlling the modulator circuit; The modulator circuit generates a reference current, clamps the charge and discharge point voltage, and controls the charge and discharge of the capacitor to form a specific trapezoidal wave, and then generates an OOK modulated output signal with adjustable amplitude and slope through envelope shaping.

[0007] Preferably, the OOK modulator specifically includes: three input signal ports and one output signal port; Among them, the three input signal ports are low-frequency input signal IN, high-frequency carrier signal OSC, and reference voltage signal VREF, and the output signal port is the modulated output signal OUT; The control logic circuit is used to process the low-frequency input signal IN and the high-frequency carrier signal OSC to generate signals for controlling the modulator circuit, including the IN_D signal, the OUT_A signal, the OUT_B signal and the IN_B signal; Among them, the high-frequency carrier signal OSC is used to beat and delay the low-frequency input signal IN through the DFF chain, and the signal after the beat delay is logically operated with the low-frequency input signal IN to obtain the IN_D signal; the IN_D signal and the high-frequency carrier signal OSC are logically operated to generate the OUT_B signal, and the OUT_B signal is inverted to obtain the OUT_A signal; the low-frequency input signal IN is directly inverted to obtain the IN_B signal.

[0008] Preferably, the modulator circuit includes a reference current generating circuit, a current comparator with feedback, an amplitude modulation and slope adjustment part, and an envelope shaping part; The reference current generating circuit is used to generate a reference current based on a reference voltage signal VREF and mirror the reference current; The current comparator with feedback is used to compare the reference voltage signal VREF with the voltage of the charge and discharge point VC to achieve clamping of the voltage of the charge and discharge point VC; The amplitude modulation and slope adjustment part is used to charge and discharge the capacitor of the charge and discharge point VC using the mirrored current under the control of the IN signal and the IN_B signal, forming a trapezoidal wave with a specific amplitude and slope; The envelope shaping part is used to perform envelope shaping on the OUT_A signal and the OUT_B signal, modulate their amplitude and slope onto the trapezoidal wave of the charge and discharge point VC, and generate the final modulated output signal OUT.

[0009] Preferably, the reference current generating circuit includes an operational amplifier OPA, an NMOS transistor NM8, a resistor R1 and a plurality of MOS transistors for current mirroring; The reference voltage signal VREF generates a reference current VREF / R1 on the corresponding PMOS transistor through the operational amplifier OPA, the NMOS transistor NM8 and the resistor R1, and then the reference current is mirrored to other corresponding MOS transistors through the mirroring effect of multiple MOS transistors.

[0010] Preferably, the current comparator with feedback is composed of a plurality of PMOS transistors and NMOS transistors, including PM1, PM2, PM7, NM1, NM2, and NM7; wherein the gate of PM1 is connected to the reference voltage signal VREF, and the gate of PM2 is connected to the charge and discharge point VC; When the voltage at the charge / discharge point VC approaches the reference voltage signal VREF, most of the current in PM7 flows through PM1, the current in PM2 decreases, the gate voltage of NM1 increases, and the voltage at the charge / discharge point VC is pulled down through NM7 until the voltage at the charge / discharge point VC equals the reference voltage signal VREF. When the voltage at the charge and discharge point VC is discharged to 0V, most of the current of PM7 flows through PM2, the current in PM1 decreases, the gate voltage of NM1 drops, NM7 is turned off, and has no effect on the charge and discharge point VC.

[0011] Preferably, the amplitude modulation and slope adjustment part includes switching tubes PM5, PM6, NM5, NM6 and capacitor C1; The IN signal and IN_B signal control the on and off of the switch tube. When IN is low and IN_B is high, PM5 and NM6 are turned on, PM6 and NM5 are turned off, and the charging current charges the capacitor C1; When IN is high and IN_B is low, PM5 and NM6 are turned off, PM6 and NM5 are turned on, and the discharge current discharges the capacitor C1; the charging current is equal to the discharging current, and the charging and discharging time is equal.

[0012] Preferably, the number of beats N of the DFF chain is approximately equal to the product of the resistor R1 and the capacitor C1 divided by the period Tosc of the high-frequency carrier signal OSC, ie, N≈(R1×C1) / Tosc.

[0013] Preferably, the amplitude of the trapezoidal wave formed by the amplitude modulation and slope adjustment part is at most the reference voltage signal VREF, and the slope is approximately equal to the reference voltage signal VREF divided by the product of the resistor R1 and the capacitor C1, that is, slope≈VREF / (R1×C1).

[0014] In a second aspect, a method for using an OOK modulator with adjustable signal amplitude and slope is provided, comprising: Signal access steps: connect the low-frequency input signal IN to the low-frequency signal input terminal of the modulator, connect the high-frequency carrier signal OSC to the carrier signal input terminal of the modulator, and connect the reference voltage signal VREF to the reference voltage input terminal of the modulator; Amplitude parameter setting steps: According to the amplitude requirement of the target output signal, adjust the value of the reference voltage signal VREF so that the amplitude of the modulator output signal OUT changes with the change of VREF, wherein the maximum amplitude of the output signal OUT is equal to VREF; Steps for setting the slope parameters: According to the edge slope requirements of the target output signal, adjust the parameters of the resistor R1 or capacitor C1 of the AM slope adjustment part of the modulator so that the slope of the output signal OUT changes with the change of R1 or C1; Start the modulation step: The input signal is processed by the modulator's control logic circuit and modulator circuit to generate and output an OOK modulated signal OUT that meets the set amplitude and slope.

[0015] Preferably, the starting modulation step includes: The control logic circuit performs beat delay and logic operations on the OSC signal and the IN signal through the DFF chain to generate the OUT_A, OUT_B, and IN_B control signals; The modulator circuit is based on the control signal and uses a reference current generation circuit and a current comparator with feedback to control the charge and discharge of the charge and discharge point VC, forming a trapezoidal wave, and assigning the amplitude and slope of the trapezoidal wave to the OOK modulated signal through envelope shaping.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention generates a voltage envelope of an OOK modulated signal through a current comparator with feedback. The amplitude and slope of this envelope can be adjusted by VREF voltage, resistance and capacitance. This envelope signal is then shaped onto the OOK modulated signal to generate a final output signal. Compared with traditional OOK modulated signals, the output signal has an adjustable amplitude and slope, which can reduce dynamic power consumption and external radiation.

[0017] Other beneficial effects of the present invention will be explained through the introduction of specific technical features and technical solutions in the specific implementation methods. Those skilled in the art should be able to understand the beneficial technical effects brought about by the introduction of these technical features and technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings: Figure 1 This is the input and output signal diagram of traditional OOK modulation; Figure 2 A control logic circuit for the OOK modulator of the present invention; Figure 3 The OOK modulator circuit of the present invention; Figure 4 This is the input and output signal diagram of the OOK modulator of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0020] The embodiment of the present invention provides an OOK modulator with adjustable signal amplitude and slope, referring to Figure 2 and Figure 3 As shown, the OOK modulator of the present invention includes three input signal ports, one output signal port, a control logic circuit and a modulator circuit; wherein the three input signal ports are a low-frequency input signal IN, a high-frequency carrier signal OSC, and a reference voltage signal VREF, and the output signal port is a modulated output signal OUT.

[0021] Reference Figure 2 As shown in FIG, the control logic circuit of the OOK modulator of the present invention is used to process the low-frequency input signal IN and the high-frequency carrier signal OSC to generate a signal for controlling the modulator circuit.

[0022] Among them, the high-frequency carrier signal OSC is used to beat and delay the low-frequency input signal IN through the DFF chain, and the signal after the beat delay is logically operated with the low-frequency input signal IN to obtain the IN_D signal; the IN_D signal and the high-frequency carrier signal OSC are logically operated to generate the OUT_B signal, and the OUT_B signal is inverted to obtain the OUT_A signal; the low-frequency input signal IN is directly inverted to obtain the IN_B signal.

[0023] Specifically, refer to Figure 3 and Figure 4 As shown, the DFF chain is used to beat delay the OSC signal to the IN signal. Each beat delays one osc cycle. The number of beats N is approximately equal to R1 multiplied by C1 and then divided by the osc cycle Tosc, that is, N≈(R1×C1) / Tosc. The signal after the beat delay is then logically ANDed with the IN signal to obtain the IN_D signal, as shown Figure 4 As shown in the signal diagram, the low-level pulse width of the IN_D signal increases by N*Tosc relative to the IN signal, and the high-level pulse width decreases accordingly. Then the IN_D signal and the OSC signal are combined to generate OUT_B, which is then inverted to generate OUT_A. The IN signal is directly inverted to generate IN_B. OUT_A, OUT_B, and IN_B are used to control Figure 3 The switches for amplitude modulation and slope modulation in the OOK modulator circuit.

[0024] The modulator circuit generates a reference current, clamps the charge and discharge point voltage, and controls the charge and discharge of the capacitor to form a specific trapezoidal wave, and then generates an OOK modulated output signal with adjustable amplitude and slope through envelope shaping. Figure 3 As shown, the OOK modulator circuit of the present invention can be generally divided into four parts. The first part is the reference current generating circuit 1, the second part is the current comparator 2 with feedback, the third part is the amplitude modulation and slope adjustment part 3, and the fourth part is the envelope shaping part 4.

[0025] A reference current generating circuit is used to generate a reference current based on a reference voltage signal VREF and mirror the reference current. The reference current generating circuit includes an operational amplifier OPA, an NMOS transistor NM8, a resistor R1, and multiple MOS transistors for current mirroring. The reference voltage signal VREF generates a reference current VREF / R1 on the corresponding PMOS transistor through the operational amplifier OPA, the NMOS transistor NM8, and the resistor R1. This current is then mirrored to PM4 / 7 / 8 respectively. The current of PM4 is then mirrored to NM4 through NM3, so that the charging current of PM8 is equal to the discharging current of NM4.

[0026] The current comparator with feedback is used to compare the reference voltage signal VREF with the voltage of the charge and discharge point VC to achieve the clamping of the charge and discharge point VC voltage. Figure 3 As shown, the current comparator with feedback is composed of multiple PMOS transistors and NMOS transistors, including PM1, PM2, PM7, NM1, NM2, and NM7; among which, the gate of PM1 is connected to the reference voltage signal VREF, and the gate of PM2 is connected to the charge and discharge point VC.

[0027] When the voltage at the charge and discharge point VC is close to the reference voltage signal VREF, most of the current of PM7 flows through PM1, the current in PM2 decreases, the gate voltage of NM1 increases, and the voltage at the charge and discharge point VC is pulled down through NM7 until the voltage at the charge and discharge point VC is equal to the reference voltage signal VREF; when the voltage at the charge and discharge point VC is discharged to 0V, most of the current of PM7 flows through PM2, the current in PM1 decreases, the gate voltage of NM1 drops, NM7 is turned off, and has no effect on the charge and discharge point VC.

[0028] Reference Figure 3 As shown, the amplitude modulation and slope adjustment part is used to charge and discharge the capacitor of the charge and discharge point VC using the mirrored current under the control of the IN signal and the IN_B signal, forming a trapezoidal wave with a specific amplitude and slope.

[0029] The amplitude modulation and slope adjustment part includes switching tubes PM5, PM6, NM5, NM6 and capacitor C1; the IN signal and IN_B signal generated by the logic control circuit control the on and off of the switching tubes. When IN is low and IN_B is high, PM5 and NM6 are turned on, PM6 and NM5 are turned off, and the charging current charges the capacitor C1 at point VC; when IN is high and IN_B is low, PM5 and NM6 are turned off, PM6 and NM5 are turned on, and the discharge current discharges the capacitor C1 at point VC; the charging current is equal to the discharging current, and the charging and discharging time is equal.

[0030] During the charging process of VC, when the voltage at VC reaches VREF, the current comparator with feedback can play a clamping role, clamping the maximum level of VC at VREF. The specific clamping process is that when the voltage at VC is about to exceed VREF, most of the current of PM7 begins to flow through PM1, the current in PM2 decreases, the current of PM1 flows through NM1, the gate voltage of NM1 increases, and the voltage at VC is pulled down through NM7 until a balance VC equals VREF is formed. At this time, the current of PM8 flows through NM7 and no longer charges VC. During the discharge process of VC, the voltage at VC can be reduced to 0 because when discharging to 0, most of the current of PM7 flows through PM2, the current in PM1 decreases, the gate voltage of NM1 drops, NM7 is turned off, and has no effect on VC. The current of NM4 can continue to pull down the VC point, so it can be discharged to the minimum voltage of 0V.

[0031] After the charge and discharge is completed, the Figure 4 The VC waveform in the figure is a trapezoidal wave with a certain slope and a certain amplitude. The maximum amplitude of the trapezoidal wave formed by the amplitude modulation and slope adjustment part is the reference voltage signal VREF, and the slope is approximately equal to the reference voltage signal VREF divided by the product of the resistor R1 and the capacitor C1, that is, the slope ≈ VREF / (R1×C1).

[0032] Reference Figure 3 As shown, the envelope shaping part is used to perform envelope shaping on the OUT_A signal and the OUT_B signal, modulate their amplitude and slope to the trapezoidal wave of the charge and discharge point VC, and generate the final modulated output signal OUT.

[0033] like Figure 4 As can be seen, OUT is a trapezoidal OOK modulated signal with a certain slope and amplitude. The amplitude of the OOK modulated signal can be adjusted by adjusting the VREF voltage, and the slope of the OOK modulated signal can be adjusted by adjusting the resistor R1 or the capacitor C1. It can adapt to different applications and reduce dynamic power consumption and external radiation.

[0034] The present invention also provides a method for using an OOK modulator with adjustable signal amplitude and slope, the method specifically comprising: Signal access steps: connect the low-frequency input signal IN to the low-frequency signal input terminal of the modulator, connect the high-frequency carrier signal OSC to the carrier signal input terminal of the modulator, and connect the reference voltage signal VREF to the reference voltage input terminal of the modulator.

[0035] Amplitude parameter setting steps: According to the amplitude requirement of the target output signal, adjust the magnitude of the reference voltage signal VREF so that the amplitude of the modulator output signal OUT changes with the change of VREF, wherein the maximum amplitude of the output signal OUT is equal to VREF.

[0036] Steps for setting the slope parameters: According to the edge slope requirements of the target output signal, adjust the parameters of the resistor R1 or capacitor C1 in the AM slope adjustment part of the modulator so that the slope of the output signal OUT changes with the change of R1 or C1, where the slope is approximately VREF / (R1×C1).

[0037] Start modulation step: The input signal is processed by the modulator control logic circuit and the modulator circuit to generate and output the OOK modulated signal OUT that meets the set amplitude and slope, where: The control logic circuit performs beat delay and logic operations on the OSC signal and the IN signal through the DFF chain to generate the OUT_A, OUT_B, and IN_B control signals; The modulator circuit is based on the control signal and uses a reference current generation circuit and a current comparator with feedback to control the charge and discharge of the charge and discharge point VC, forming a trapezoidal wave, and assigning the amplitude and slope of the trapezoidal wave to the OOK modulated signal through envelope shaping.

[0038] An embodiment of the present invention provides an OOK modulator with adjustable signal amplitude and slope and a method for using the same. The voltage envelope of the OOK modulated signal is generated by a current comparator with feedback. The amplitude and slope of this envelope can be adjusted by the VREF voltage, resistors and capacitors. This envelope signal is then shaped onto the OOK modulated signal to generate a final output signal. Compared with traditional OOK modulated signals, this output signal has the function of adjustable amplitude and slope, which can reduce dynamic power consumption and external radiation.

[0039] Those skilled in the art will appreciate that, in addition to implementing the system and its various devices, modules, and units provided by the present invention in purely computer-readable program code, it is entirely possible to implement the same functions of the system and its various devices, modules, and units provided by the present invention in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered a hardware component, and the devices, modules, and units included therein for implementing various functions can also be considered as structures within the hardware component; the devices, modules, and units for implementing various functions can also be considered as both software modules implementing the method and structures within the hardware component.

[0040] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. An OOK modulator with adjustable signal amplitude and slope, characterized in that: include: a control logic circuit, a modulator circuit, an input signal port, and an output signal port; The control logic circuit is used to process the input signal and generate a signal for controlling the modulator circuit; The modulator circuit generates a reference current, clamps the charge and discharge point voltage, and controls the charge and discharge of the capacitor to form a specific trapezoidal wave, and then generates an OOK modulated output signal with adjustable amplitude and slope through envelope shaping.

2. The OOK modulator with adjustable signal amplitude and slope according to claim 1, characterized in that: The OOK modulator specifically includes: three input signal ports and one output signal port; Among them, the three input signal ports are low-frequency input signal IN, high-frequency carrier signal OSC, and reference voltage signal VREF, and the output signal port is the modulated output signal OUT; The control logic circuit is used to process the low-frequency input signal IN and the high-frequency carrier signal OSC to generate signals for controlling the modulator circuit, including the IN_D signal, the OUT_A signal, the OUT_B signal and the IN_B signal; Among them, the high-frequency carrier signal OSC is used to beat and delay the low-frequency input signal IN through the DFF chain, and the signal after the beat delay is logically operated with the low-frequency input signal IN to obtain the IN_D signal; the IN_D signal and the high-frequency carrier signal OSC are logically operated to generate the OUT_B signal, and the OUT_B signal is inverted to obtain the OUT_A signal; the low-frequency input signal IN is directly inverted to obtain the IN_B signal.

3. The OOK modulator with adjustable signal amplitude and slope according to claim 2, characterized in that: The modulator circuit includes a reference current generating circuit, a current comparator with feedback, an amplitude modulation and slope adjustment part, and an envelope shaping part; The reference current generating circuit is used to generate a reference current based on a reference voltage signal VREF and mirror the reference current; The current comparator with feedback is used to compare the reference voltage signal VREF with the voltage of the charge and discharge point VC to achieve clamping of the voltage of the charge and discharge point VC; The amplitude modulation and slope adjustment part is used to charge and discharge the capacitor of the charge and discharge point VC using the mirrored current under the control of the IN signal and the IN_B signal, forming a trapezoidal wave with a specific amplitude and slope; The envelope shaping part is used to perform envelope shaping on the OUT_A signal and the OUT_B signal, modulate their amplitude and slope onto the trapezoidal wave of the charge and discharge point VC, and generate the final modulated output signal OUT.

4. The OOK modulator with adjustable signal amplitude and slope according to claim 3, characterized in that: The reference current generating circuit includes an operational amplifier OPA, an NMOS transistor NM8, a resistor R1 and a plurality of MOS transistors for current mirroring; The reference voltage signal VREF generates a reference current VREF / R1 on the corresponding PMOS transistor through the operational amplifier OPA, the NMOS transistor NM8 and the resistor R1, and then the reference current is mirrored to other corresponding MOS transistors through the mirroring effect of multiple MOS transistors.

5. The OOK modulator with adjustable signal amplitude and slope according to claim 3, characterized in that: The current comparator with feedback is composed of multiple PMOS transistors and NMOS transistors, including PM1, PM2, PM7, NM1, NM2, and NM7; wherein the gate of PM1 is connected to the reference voltage signal VREF, and the gate of PM2 is connected to the charge and discharge point VC; When the voltage at the charge / discharge point VC approaches the reference voltage signal VREF, most of the current in PM7 flows through PM1, the current in PM2 decreases, the gate voltage of NM1 increases, and the voltage at the charge / discharge point VC is pulled down through NM7 until the voltage at the charge / discharge point VC equals the reference voltage signal VREF. When the voltage at the charge and discharge point VC is discharged to 0V, most of the current of PM7 flows through PM2, the current in PM1 decreases, the gate voltage of NM1 drops, NM7 is turned off, and has no effect on the charge and discharge point VC.

6. The OOK modulator with adjustable signal amplitude and slope according to claim 3, characterized in that: The amplitude modulation and slope adjustment part includes switch tubes PM5, PM6, NM5, NM6 and capacitor C1; The IN signal and IN_B signal control the on and off of the switch tube. When IN is low and IN_B is high, PM5 and NM6 are turned on, PM6 and NM5 are turned off, and the charging current charges the capacitor C1; When IN is high and IN_B is low, PM5 and NM6 are turned off, PM6 and NM5 are turned on, and the discharge current discharges the capacitor C1; the charging current is equal to the discharging current, and the charging and discharging time is equal.

7. The OOK modulator with adjustable signal amplitude and slope according to claim 2, characterized in that: The number of beats N of the DFF chain is approximately equal to the product of the resistor R1 and the capacitor C1 divided by the period Tosc of the high-frequency carrier signal OSC, ie, N≈(R1×C1) / Tosc.

8. The OOK modulator with adjustable signal amplitude and slope according to claim 3, characterized in that: The maximum amplitude of the trapezoidal wave formed by the amplitude modulation and slope adjustment part is the reference voltage signal VREF, and the slope is approximately equal to the reference voltage signal VREF divided by the product of the resistor R1 and the capacitor C1, that is, slope≈VREF / (R1×C1).

9. A method for using an OOK modulator with adjustable signal amplitude and slope, based on the OOK modulator with adjustable signal amplitude and slope according to any one of claims 1 to 8, characterized in that: include: Signal access steps: connect the low-frequency input signal IN to the low-frequency signal input terminal of the modulator, connect the high-frequency carrier signal OSC to the carrier signal input terminal of the modulator, and connect the reference voltage signal VREF to the reference voltage input terminal of the modulator; Amplitude parameter setting steps: According to the amplitude requirement of the target output signal, adjust the value of the reference voltage signal VREF so that the amplitude of the modulator output signal OUT changes with the change of VREF, wherein the maximum amplitude of the output signal OUT is equal to VREF; Steps for setting the slope parameters: According to the edge slope requirements of the target output signal, adjust the parameters of the resistor R1 or capacitor C1 of the AM slope adjustment part of the modulator so that the slope of the output signal OUT changes with the change of R1 or C1; Start the modulation step: The input signal is processed by the modulator's control logic circuit and modulator circuit to generate and output an OOK modulated signal OUT that meets the set amplitude and slope.

10. The method for using the OOK modulator with adjustable signal amplitude and slope according to claim 9, wherein: The starting modulation step comprises: The control logic circuit performs beat delay and logic operations on the OSC signal and the IN signal through the DFF chain to generate the OUT_A, OUT_B, and IN_B control signals; The modulator circuit is based on the control signal and uses a reference current generation circuit and a current comparator with feedback to control the charge and discharge of the charge and discharge point VC, forming a trapezoidal wave, and assigning the amplitude and slope of the trapezoidal wave to the OOK modulated signal through envelope shaping.

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