Quantum random signal generator

Abstract

The utility model discloses a quantum random signal generator which comprises an amplified spontaneous emission entropy source module, a transimpedance amplification filtering module, an analog-to-digital signal conversion module, a quantum random number generation module, a numerical control reference voltage generation module and a digital-to-analog signal conversion module. The cross-group amplification filtering module is electrically connected with the amplified spontaneous emission entropy source module and converts an analog current signal output by the amplified spontaneous emission entropy source module into an analog voltage signal; the analog-to-digital signal conversion module is electrically connected with the cross-group amplification filtering module and converts the analog voltage signal into a digital signal; the quantum random number generation module is electrically connected with the analog-to-digital signal conversion module and is used for post-processing the digital signal to generate a random number; and the digital-analog signal conversion module is electrically connected with the output end of the numerical control reference voltage generation module and the quantum random number generation module, and converts the random number into a random voltage signal in accordance with the output reference voltage range of the numerical control reference voltage generation module. By means of the structure, the amplitude-adjustable random voltage signal is generated.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to a quantum random signal generator. Background Art

[0002] Currently, random numbers have important applications in cryptography, simulation, physical experiments, etc. Traditional pseudo-random number generators (PRNGs) use deterministic algorithms to generate digital sequences, which lack true randomness.

[0003] In order to meet the demand for random numbers, a true random number generator based on a true random process has also appeared in the prior art to generate random numbers. However, the true random number generator can only generate random numbers, but cannot generate a controllable random voltage signal, and has a narrow scope of application. Utility Model Content

[0004] The utility model provides a quantum random signal generator for generating a random voltage signal with a wide application range and adjustable amplitude.

[0005] The utility model provides a quantum random signal generator, including an amplified spontaneous radiation entropy source module, a transimpedance amplification and filtering module, an analog-to-digital signal conversion module, a quantum random number generation module, a digitally controlled reference voltage generation module, and a digital-to-analog signal conversion module;

[0006] The input end of the cross-group amplification and filtering module is electrically connected to the output end of the amplified spontaneous radiation entropy source module, and the cross-group amplification and filtering module converts the analog current signal output by the amplified spontaneous radiation entropy source module into an analog voltage signal, and filters the converted analog voltage signal;

[0007] The input end of the analog-to-digital signal conversion module is electrically connected to the output end of the cross-group amplification and filtering module, and the analog-to-digital signal conversion module converts the analog voltage signal into a digital signal;

[0008] The input end of the quantum random number generation module is electrically connected to the output end of the analog-to-digital signal conversion module, and the quantum random number generation module performs post-processing on the digital signal to generate a random number;

[0009] The input end of the digital-to-analog signal conversion module is electrically connected to the output end of the digital control reference voltage generation module and the output end of the quantum random number generation module respectively, and the digital-to-analog signal conversion module converts the random number into a random voltage signal that conforms to the reference voltage range output by the digital control reference voltage generation module.

[0010] Optionally, the quantum random signal generator further includes: an operational amplifier module;

[0011] The operational amplifier module is electrically connected to the output end of the digital-to-analog signal conversion module, and the operational amplifier module amplifies the random voltage signal.

[0012] Optionally, the amplified spontaneous emission entropy source module includes an amplified spontaneous emission laser and a photodetector;

[0013] The amplified spontaneous emission laser is connected to the photodetector by flip-chip welding, and the signal output port of the photodetector is electrically connected to the input end of the transimpedance amplification and filtering module.

[0014] Optionally, the transimpedance amplification and filtering module includes an amplification unit and a filter;

[0015] The output end of the amplifying unit is electrically connected to the input end of the filter, and the output end of the filter is electrically connected to the input end of the analog-to-digital signal conversion module.

[0016] Optionally, the amplification unit includes an operational amplifier and a feedback resistor;

[0017] The negative input terminal of the operational amplifier is electrically connected to the output terminal of the amplified spontaneous radiation entropy source module, the positive input terminal of the operational amplifier is grounded, and the output terminal of the operational amplifier is electrically connected to the input terminal of the filter;

[0018] The feedback resistor is connected in parallel between the negative input terminal and the output terminal of the operational amplifier.

[0019] Optionally, the quantum random signal generator further includes: a controller;

[0020] The output end of the controller is electrically connected to the input end of the digital control reference voltage generating module, and the controller controls the digital control reference voltage generating module to output a reference voltage range.

[0021] Optionally, the quantum random signal generator further includes: a human-computer interaction module;

[0022] The input end of the controller is electrically connected to the output end of the human-machine interaction module. The controller controls the reference voltage generation module to output a corresponding reference voltage range according to the reference voltage control number input by the human-machine interaction module.

[0023] Optionally, the human-computer interaction module includes mechanical buttons, digital keys or a touch display.

[0024] Optionally, the quantum random number generation module includes one or more FPGA chips.

[0025] Optionally, the quantum random signal generator further includes: a circuit board;

[0026] The amplified spontaneous radiation entropy source module, the transimpedance amplification and filtering module, the analog-to-digital signal conversion module, the quantum random number generation module, the digital control reference voltage generation module and the digital-to-analog signal conversion module are all integrated on the circuit board.

[0027] The technical solution of the utility model is to input the analog current signal output by the amplified spontaneous radiation entropy source module into the transimpedance amplification and filtering module. After receiving the analog current signal, the transimpedance amplification and filtering module will convert the received analog current signal into an analog voltage signal, and at the same time, the analog voltage signal can be amplified. The amplified analog voltage signal will also be filtered in the transimpedance amplification and filtering module to remove noise and stray signals, improve the quality and purity of the analog voltage signal, and thus generate a filtered analog voltage signal. The filtered analog voltage signal will be transmitted to the analog-to-digital signal conversion module. After receiving the analog voltage signal, the analog-to-digital signal conversion module will convert the received analog voltage signal into a discrete digital signal. The converted digital signal will be transmitted to the quantum random number generation module. After receiving the digital signal, the quantum random number generation module will perform Toplitz matrix transformation on the received digital signal to convert the digital signal into a discrete random number, thereby generating a high-quality quantum digital random number. The generated random number will be transmitted to the digital-to-analog signal conversion module, and at the same time, the digital control reference voltage generation module can transmit the output reference voltage range to the digital-to-analog signal conversion module. After receiving the random number generated by the quantum random number generation module and the reference voltage range output by the digital control reference voltage generation module, the digital-to-analog signal conversion module will convert the random number into a random voltage signal that conforms to the reference voltage range. Using the above structure, by changing the reference voltage range output by the digital control reference voltage generation module, the random voltage signal output by the digital-to-analog signal conversion module changes accordingly, and the random voltage signal is regulated, so that the digital-to-analog signal conversion module can generate random voltage signals of different amplitudes to meet the needs of subsequent related experimental research using the random voltage signal. The adjustability of the random voltage signal is achieved.

[0028] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic diagram of the structure of a quantum random signal generator provided by an embodiment of the utility model;

[0031] Figure 2A schematic diagram of the structure of a second quantum random signal generator provided by an embodiment of the utility model;

[0032] Figure 3 A schematic diagram of the structure of an amplified spontaneous radiation entropy source module provided in an embodiment of the utility model;

[0033] Figure 4 A schematic diagram of the structure of a third quantum random signal generator provided by an embodiment of the utility model;

[0034] Figure 5 A schematic diagram of the structure of a transimpedance amplification and filtering module provided in an embodiment of the utility model;

[0035] Figure 6 A schematic diagram of the structure of a fourth quantum random signal generator provided by an embodiment of the utility model;

[0036] Figure 7 A schematic structural diagram of a fifth quantum random signal generator provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein.

[0039] In one embodiment, Figure 1 A schematic diagram of the structure of a quantum random signal generator provided by an embodiment of the utility model, such as Figure 1As shown, the quantum random signal generator includes an amplified spontaneous radiation entropy source module 1, a transimpedance amplification and filtering module 2, an analog-to-digital signal conversion module 3, a quantum random number generation module 4, a digital control reference voltage generation module 5 and a digital-to-analog signal conversion module 6; the input end of the transimpedance amplification and filtering module 2 is electrically connected to the output end of the amplified spontaneous radiation entropy source module 1, the transimpedance amplification and filtering module 2 converts the analog current signal output by the amplified spontaneous radiation entropy source module 1 into an analog voltage signal, and filters the converted analog voltage signal; the input end of the analog-to-digital signal conversion module 3 is electrically connected to the output end of the transimpedance amplification and filtering module 2, and the analog-to-digital signal conversion module 3 converts the analog voltage signal into a digital signal; the input end of the quantum random number generation module 4 is electrically connected to the output end of the analog-to-digital signal conversion module 3, and the quantum random number generation module 4 performs post-processing on the digital signal to generate a random number; the input end of the digital-to-analog signal conversion module 6 is electrically connected to the output end of the digital control reference voltage generation module 5 and the output end of the quantum random number generation module 4, respectively, and the digital-to-analog signal conversion module 6 converts the random number into a random voltage signal that meets the reference voltage range output by the digital control reference voltage generation module 5.

[0040] Among them, entropy is a measure of disorder, randomness or difference in a closed system. The amplified spontaneous radiation entropy source module 1 is the basis of this structure, which uses the current signal of amplified spontaneous radiation as the entropy source; since spontaneous radiation is an unpredictable natural phenomenon, the current signal generated by spontaneous radiation has a high degree of randomness and uncertainty, which can provide a basis for the subsequent generation of random numbers and random voltage signals. The transimpedance amplification and filtering module 2 is a front-end amplifier of an optical sensor (such as a photodiode), which is used to convert the analog current signal output by the amplified spontaneous radiation entropy source module 1 into an analog voltage signal, and can amplify and filter the converted analog voltage signal. The analog-to-digital signal conversion module 3 represents the conversion of a continuously changing analog signal into a discrete digital signal through techniques such as sampling and quantization. In this embodiment, the analog-to-digital signal conversion module 3 may include an analog-to-digital converter (ADC) chip, and the model of the analog-to-digital converter chip may be 5962R1320801VXC. The quantum random number generation module 4 is used to post-process the digital signal to generate high-quality quantum digital random numbers. In this embodiment, the quantum random number generation module 4 includes one or more FPGA chips, and the model of the FPGA chip can be XC7K325T-1FBG676C. The digital control reference voltage generation module 5 is used to generate an adjustable reference voltage. Specifically, the reference voltage value of the output can be changed by inputting a specific digital control signal to generate a reference voltage with a certain range. In this embodiment, the digital control reference voltage generation module 5 may include a reference voltage chip of model LM4040. The digital-to-analog signal conversion module 6 represents the conversion of discrete digital signals into continuously changing analog signals through techniques such as sampling and quantization. In this embodiment, the digital-to-analog signal conversion module 6 may include a digital-to-analog converter (DAC) chip, and the model of the digital-to-analog converter chip may be DAC8830IDR.

[0041] Specifically, when generating a random voltage signal, the input end of the transimpedance amplification and filtering module 2 is electrically connected to the output end of the amplified spontaneous radiation entropy source module 1, the input end of the analog-to-digital signal conversion module 3 is electrically connected to the output end of the transimpedance amplification and filtering module 2, the input end of the quantum random number generation module 4 is electrically connected to the output end of the analog-to-digital signal conversion module 3, and the input end of the digital-to-analog signal conversion module 6 is electrically connected to the output end of the digital control reference voltage generation module 5 and the output end of the quantum random number generation module 4, respectively, so that the analog current signal output by the amplified spontaneous radiation entropy source module 1 can be input to the transimpedance amplification and filtering module 2. After receiving the analog current signal, the transimpedance amplification and filtering module 2 will convert the received analog current signal into an analog voltage signal, and at the same time, the analog voltage signal can be amplified. The amplified analog voltage signal will also be filtered in the transimpedance amplification and filtering module 2 to remove noise and stray signals of the analog voltage signal, improve the quality and purity of the analog voltage signal, thereby generating a filtered analog voltage signal. The filtered analog voltage signal will be transmitted to the analog-to-digital signal conversion module 3. After receiving the analog voltage signal, the analog-to-digital signal conversion module 3 will convert the received analog voltage signal into a discrete digital signal. The converted digital signal will be transmitted to the quantum random number generation module 4. After receiving the digital signal, the quantum random number generation module 4 will post-process the received digital signal. Specifically, the received digital signal can be subjected to a Toplitz matrix transformation to convert the digital signal into a discrete random number, thereby generating a high-quality quantum digital random number, wherein the random number is usually a binary random number, that is, the output number only includes 0 and / or 1, but the output random number can include at least one digit, that is, it can be one digit, two digits, or three digits, etc. Exemplarily, the random number can be 0, 01, or 011, etc. The generated random number will be transmitted to the digital-to-analog signal conversion module 6. At the same time, the digital control reference voltage generation module 5 can input the reference voltage through the human-computer interaction mode or output the adjustable reference voltage range in a default form. The reference voltage range output by the digital control reference voltage generation module 5 will be transmitted to the digital-to-analog signal conversion module 6. After the digital-to-analog signal conversion module 6 receives the random number generated by the quantum random number generation module 4 and the reference voltage range output by the digital control reference voltage generation module 5, it will convert the random number into a random voltage signal that conforms to the reference voltage range, wherein the reference voltage range is mainly used to limit the maximum voltage signal of the random voltage signal output by the digital control reference voltage generation module 5.

[0042] It can be understood that by changing the reference voltage range output by the digital control reference voltage generating module 5, the random voltage signal output by the digital-to-analog signal conversion module 6 will also change accordingly. Therefore, according to different application requirements, the digital-to-analog signal conversion module 6 can generate random voltage signals of different amplitudes to achieve the adjustability of the random voltage signal.

[0043] In an optional embodiment, when the random number generated by the quantum random number generation module 4 is a 1-bit digit, that is, the output random number may be 0 or 1, at this time, the reference voltage range output by the numerical control reference voltage generation module 5 may be 0 to 3V. When the random number output by the quantum random number generation module 4 is 0, the digital-to-analog signal conversion module 6 will convert the input random number 0 into a random voltage signal that is consistent with the reference voltage range of 0 to 3V. In this embodiment, the random voltage signal corresponding to the random number 0 is set to 0V, so the digital-to-analog signal conversion module 6 will output a random voltage signal of 0V. Similarly, when the random number output by the quantum random number generation module 4 is 1, the digital-to-analog signal conversion module 6 will convert the input random number 1 into a random voltage signal that is consistent with the reference voltage range of 0 to 3V. In this embodiment, the random voltage signal corresponding to the random number 1 is 3V, so the digital-to-analog signal conversion module 6 will output a random voltage signal of 3V.

[0044] In another optional embodiment, when the random number generated by the quantum random number generation module 4 is a 2-digit number, that is, the output random number may be 00, 01, 10 or 11, at this time, the reference voltage range output by the digital control reference voltage generation module 5 can be 0 to 3V. When the random number output by the quantum random number generation module 4 is 00, the digital-to-analog signal conversion module 6 converts the input random number 00 into a random voltage signal that conforms to the reference voltage range of 0 to 3V. In this embodiment, the random voltage signal corresponding to the random number 00 is 0V, so the digital-to-analog signal conversion module 6 outputs a random voltage signal of 0V. When the random number output by the quantum random number generation module 4 is 01, the digital-to-analog signal conversion module 6 converts the input random number 01 into a random voltage signal that conforms to the reference voltage range of 0 to 3V. In this embodiment, the random voltage signal corresponding to the random number 01 is 1V, so the digital-to-analog signal conversion module 6 outputs a random voltage signal of 1V. When the random number output by the quantum random number generation module 4 is 10, the digital-to-analog signal conversion module 6 will convert the input random number 10 into a random voltage signal that is consistent with the reference voltage range of 0 to 3V. In this embodiment, the random voltage signal corresponding to the random number 10 is 2V, so the digital-to-analog signal conversion module 6 will output a 2V random voltage signal. When the random number output by the quantum random number generation module 4 is 11, the digital-to-analog signal conversion module 6 will convert the input random number 11 into a random voltage signal that is consistent with the reference voltage range of 0 to 3V. In this embodiment, the random voltage signal corresponding to the random number 11 is 3V, so the digital-to-analog signal conversion module 6 will output a 3V random voltage signal. Among them, the size of the random voltage signal output by the digital-to-analog signal conversion module 6 can correspond to the decimal number after the binary random number is converted to a decimal random number, or can be set accordingly in other ways, and no specific restrictions are made here.

[0045] In another optional embodiment, when the random number generated by the quantum random number generation module 4 is a 4-digit number, that is, the output random number may be 0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111, 1000, 1001, 1010, 1011, 1100, 1101, 1110 or 1111, a total of 16 cases, at which time the reference voltage range output by the numerical control reference voltage generation module 5 may be 0 to 15V. When the random number output by the quantum random number generation module 4 is 0000, the digital-to-analog signal conversion module 6 converts the input random number 0000 into a random voltage signal that conforms to the reference voltage range of 0 to 15V. In this embodiment, the random voltage signal corresponding to the random number 0000 is 0V, so the digital-to-analog signal conversion module 6 outputs a random voltage signal of 0V. When the random number output by the quantum random number generation module 4 is 0001, the digital-to-analog signal conversion module 6 converts the input random number 0001 into a random voltage signal that is consistent with the reference voltage range of 0 to 15V. In this embodiment, the random voltage signal corresponding to the random number 0001 is 1V, so the digital-to-analog signal conversion module 6 outputs a random voltage signal of 1V. When the random number output by the quantum random number generation module 4 is 0010, the digital-to-analog signal conversion module 6 converts the input random number 0010 into a random voltage signal that is consistent with the reference voltage range of 0 to 15V. In this embodiment, the random voltage signal corresponding to the random number 0010 is 2V, so the digital-to-analog signal conversion module 6 outputs a random voltage signal of 2V. When the random number output by the quantum random number generation module 4 is 0011, the digital-to-analog signal conversion module 6 will convert the input random number 0011 into a random voltage signal that conforms to the reference voltage range of 0 to 15V. In this embodiment, the random voltage signal corresponding to the random number 0011 is 3V, so the digital-to-analog signal conversion module 6 will output a 3V random voltage signal. When the random number output by the quantum random number generation module 4 is 0100, the digital-to-analog signal conversion module 6 will convert the input random number 0100 into a random voltage signal that conforms to the reference voltage range of 0 to 15V. In this embodiment, the random voltage signal corresponding to the random number 0100 is 4V, so the digital-to-analog signal conversion module 6 will output a 4V random voltage signal. By analogy, different random voltage signals that conform to the reference voltage range can be output according to different random numbers. Similarly, the size of the random voltage signal output by the digital-to-analog signal conversion module 6 can correspond to the decimal number after the binary random number is converted to a decimal random number, or can correspond in other ways, which are not specifically limited here.

[0046] The technical solution of the embodiment of the utility model is to input the analog current signal output by the amplified spontaneous radiation entropy source module into the transimpedance amplification and filtering module. After receiving the analog current signal, the transimpedance amplification and filtering module will convert the received analog current signal into an analog voltage signal, and at the same time, the analog voltage signal can be amplified. The amplified analog voltage signal will also be filtered in the transimpedance amplification and filtering module to remove noise and stray signals, improve the quality and purity of the analog voltage signal, and thus generate a filtered analog voltage signal. The filtered analog voltage signal will be transmitted to the analog-to-digital signal conversion module. After receiving the analog voltage signal, the analog-to-digital signal conversion module will convert the received analog voltage signal into a discrete digital signal. The converted digital signal will be transmitted to the quantum random number generation module. After receiving the digital signal, the quantum random number generation module will perform a Toplitz matrix transformation on the received digital signal to convert the digital signal into a discrete random number, thereby generating a high-quality quantum digital random number. The generated random number will be transmitted to the digital-to-analog signal conversion module, and at the same time, the digital control reference voltage generation module can transmit the output reference voltage range to the digital-to-analog signal conversion module. After receiving the random number generated by the quantum random number generation module and the reference voltage range output by the digital control reference voltage generation module, the digital-to-analog signal conversion module will convert the random number into a random voltage signal that conforms to the reference voltage range. Using the above structure, by changing the reference voltage range output by the digital control reference voltage generation module, the random voltage signal output by the digital-to-analog signal conversion module changes accordingly, and the random voltage signal is regulated, so that the digital-to-analog signal conversion module can generate random voltage signals of different amplitudes to meet the needs of subsequent related experimental research using the random voltage signal. The adjustability of the random voltage signal is achieved.

[0047] Optional, Figure 2 A schematic diagram of the structure of a second quantum random signal generator provided by an embodiment of the utility model, referring to Figure 2 As shown, the quantum random signal generator also includes: an operational amplifier module 7; the operational amplifier module 7 is electrically connected to the output end of the digital-to-analog signal conversion module 6, and the operational amplifier module 7 amplifies the random voltage signal.

[0048] Among them, the operational amplifier module 7 may include an electronic device that can amplify the amplitude of the input signal, thereby increasing the amplitude of the output signal and making the output signal clearer. In this embodiment, the operational amplifier module 7 is electrically connected to the output end of the digital-to-analog signal conversion module 6, and can amplify the random voltage signal output by the digital-to-analog signal conversion module 6, so that the random voltage signal can obtain a higher output amplitude and a stable random voltage signal without distortion. Exemplarily, the operational amplifier module 7 may include an operational amplifier chip.

[0049] It should be noted that if it is necessary to perform further filtering and enhancement processing on the random voltage signal after amplification, a filtering module can be electrically connected to the output end of the operational amplifier module 7, or the operational amplifier module 7 can be improved, that is, a filtering unit can be added to the operational amplifier module 7 to realize the filtering function to obtain a filtered random voltage signal and improve the quality and purity of the random voltage signal. The specific implementation method can be set according to the specific situation and is not specifically limited here.

[0050] Optional, Figure 3 A schematic diagram of a structure of an amplified spontaneous radiation entropy source module provided in an embodiment of the utility model, referring to Figure 3 As shown, the amplified spontaneous emission entropy source module 1 includes an amplified spontaneous emission laser 11 and a photodetector 12; the amplified spontaneous emission laser 11 and the photodetector 12 are connected by flip-chip bonding, and the signal output port 121 of the photodetector 12 is electrically connected to the input end of the transimpedance amplification and filtering module 2.

[0051] The amplified spontaneous emission laser 11 is used to output an analog light signal of amplified spontaneous emission, and the photodetector 12 is used to receive the analog light signal output by the amplified spontaneous emission laser 11 and convert the analog light signal into an analog current signal. In this embodiment, the amplified spontaneous emission laser 11 and the photodetector 12 are connected by flip-chip bonding, and the signal output port 121 of the photodetector 12 is electrically connected to the input end of the transimpedance amplification and filtering module 2. After the photodetector 12 converts the analog light signal output by the amplified spontaneous emission laser 11 into an analog current signal, the analog light signal can be input into the transimpedance amplification and filtering module 2 through the signal output port 121 of the photodetector 12, so as to perform subsequent signal processing in the transimpedance amplification and filtering module 2.

[0052] It should be noted that the amplified spontaneous emission laser 11 may include an amplified spontaneous emission laser chip, and the photodetector 12 may include a photodetector chip. In practical applications, the amplified spontaneous emission laser chip and the photodetector chip may be configured as an optoelectronic hybrid chip to reduce production costs.

[0053] Optional, Figure 4 The schematic diagram of the structure of the third quantum random signal generator provided by the embodiment of the utility model is shown in FIG. Figure 4 As shown, the transimpedance amplification and filtering module 2 includes an amplification unit 21 and a filter 22 ; the output end of the amplification unit 21 is electrically connected to the input end of the filter 22 , and the output end of the filter 22 is electrically connected to the input end of the analog-to-digital signal conversion module 3 .

[0054] The amplifier unit 21 is used to amplify and convert the analog voltage signal to obtain an analog voltage signal with a higher output amplitude. The filter 22 is mainly used to remove noise and stray signals from the analog voltage signal to improve the quality and purity of the analog voltage signal. In this embodiment, the amplifier unit 21 and the filter 22 can be integrated into an analog chip.

[0055] Specifically, by electrically connecting the output end of the amplifying unit 21 to the input end of the filter 22, and the output end of the filter 22 to the input end of the analog-to-digital signal conversion module 3, the amplifying unit 21 can convert the received analog current signal, convert the analog current signal into an analog voltage signal, and amplify the analog voltage signal at the same time. The amplified analog voltage signal will be transmitted to the filter 22. After receiving the amplified analog voltage signal, the filter 22 will filter the analog voltage signal to remove noise and stray signals of the analog voltage signal, thereby improving the quality and purity of the analog voltage signal. The filtered analog voltage signal can be transmitted to the analog-to-digital signal conversion module 3 for subsequent signal processing in the analog-to-digital signal conversion module 3.

[0056] Optional, Figure 5 A schematic diagram of the structure of a transimpedance amplification and filtering module provided by an embodiment of the utility model, referring to Figure 5 As shown, the amplification unit 21 includes an operational amplifier 211 and a feedback resistor R; the negative input terminal of the operational amplifier 211 is electrically connected to the output terminal of the amplified spontaneous radiation entropy source module 1, the positive input terminal of the operational amplifier 211 is grounded GND, and the output terminal of the operational amplifier 211 is electrically connected to the input terminal of the filter 22; the feedback resistor R is connected in parallel between the negative input terminal and the output terminal of the operational amplifier 211.

[0057] The operational amplifier 211 is a circuit structure with a high amplification factor. The feedback resistor R is connected in parallel between the negative input terminal and the output terminal of the operational amplifier 211, which can reduce the output offset voltage and improve the accuracy and stability of the analog voltage signal.

[0058] Optional, Figure 6 A schematic diagram of the structure of a fourth quantum random signal generator provided by an embodiment of the utility model, referring to Figure 6 As shown, the quantum random signal generator also includes: a controller 8; the output end of the controller 8 is electrically connected to the input end of the digital control reference voltage generating module 5, and the controller 8 controls the digital control reference voltage generating module 5 to output a reference voltage range.

[0059] Optional, continue to refer to Figure 6As shown, the quantum random signal generator also includes: a human-computer interaction module 9; the input end of the controller 8 is electrically connected to the output end of the human-computer interaction module 9, and the controller 8 controls the reference voltage generation module 5 to output a corresponding reference voltage range according to the reference voltage control number input by the human-computer interaction module 9.

[0060] Optionally, the human-computer interaction module 9 includes a mechanical button, a digital key or a touch display screen.

[0061] The controller 8 is used to control the numerical control reference voltage generating module 5 to output a corresponding reference voltage range according to the reference voltage input by the human-computer interaction module 9. In this embodiment, the controller 8 may include a single-chip microcomputer MCU chip. The human-computer interaction module 9 is used to provide the user with an input port for inputting a reference voltage.

[0062] Specifically, the human-computer interaction module 9 can receive a reference voltage input by the user, wherein the user input method may include a mechanical button, a digital key or a touch screen to select the reference voltage to be input, which can be determined according to the actual situation and is not specifically limited here. After the user-computer interaction module 9 receives the reference voltage input by the user, it will transmit the reference voltage to the controller 8. After the controller 8 receives the input reference voltage, it will control the reference voltage generation module 5 to output the corresponding reference voltage range according to the input reference voltage. Exemplarily, if the reference voltage input by the user is 5V, the reference voltage range finally output by the reference voltage generation module 5 is -5 to 5V.

[0063] Optional, Figure 7 A schematic diagram of the structure of a fifth quantum random signal generator provided by an embodiment of the utility model, referring to Figure 7 As shown, the quantum random signal generator also includes: a circuit board 10; an amplified spontaneous radiation entropy source module 1, a transimpedance amplification and filtering module 2, an analog-to-digital signal conversion module 3, a quantum random number generation module 4, a digitally controlled reference voltage generation module 5 and a digital-to-analog signal conversion module 6 are all integrated on the circuit board 10.

[0064] Among them, the circuit board 10 can fix each structure in an appropriate position and connect them to each other so that each structure can work normally. Specifically, by setting the circuit board 10, and integrating the amplified spontaneous radiation entropy source module 1, the transimpedance amplification and filtering module 2, the analog-to-digital signal conversion module 3, the quantum random number generation module 4, the digital control reference voltage generation module 5 and the digital-to-analog signal conversion module 6 on the circuit board 10, the volume of the quantum random signal generator can be reduced and the production cost can be reduced.

[0065] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0066] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A quantum random signal generator, characterized in that: It includes an amplified spontaneous radiation entropy source module, a transimpedance amplification and filtering module, an analog-to-digital signal conversion module, a quantum random number generation module, a digital control reference voltage generation module and a digital-to-analog signal conversion module; The input end of the transimpedance amplification and filtering module is electrically connected to the output end of the amplified spontaneous radiation entropy source module, and the transimpedance amplification and filtering module converts the analog current signal output by the amplified spontaneous radiation entropy source module into an analog voltage signal, and filters the converted analog voltage signal; The input end of the analog-to-digital signal conversion module is electrically connected to the output end of the transimpedance amplification and filtering module, and the analog-to-digital signal conversion module converts the analog voltage signal into a digital signal; The input end of the quantum random number generation module is electrically connected to the output end of the analog-to-digital signal conversion module, and the quantum random number generation module performs post-processing on the digital signal to generate a random number; The input end of the digital-to-analog signal conversion module is electrically connected to the output end of the digital control reference voltage generation module and the output end of the quantum random number generation module respectively, and the digital-to-analog signal conversion module converts the random number into a random voltage signal that conforms to the reference voltage range output by the digital control reference voltage generation module.

2. The quantum random signal generator according to claim 1, characterized in that: Also includes: Operational amplifier module; The operational amplifier module is electrically connected to the output end of the digital-to-analog signal conversion module, and the operational amplifier module amplifies the random voltage signal.

3. The quantum random signal generator according to claim 1, characterized in that: The amplified spontaneous emission entropy source module includes an amplified spontaneous emission laser and a photodetector; The amplified spontaneous emission laser is connected to the photodetector by flip-chip bonding, and the signal output port of the photodetector is electrically connected to the input end of the transimpedance amplification and filtering module.

4. The quantum random signal generator according to claim 1, characterized in that: The transimpedance amplification and filtering module includes an amplification unit and a filter; The output end of the amplifying unit is electrically connected to the input end of the filter, and the output end of the filter is electrically connected to the input end of the analog-to-digital signal conversion module.

5. The quantum random signal generator according to claim 4, characterized in that: The amplification unit includes an operational amplifier and a feedback resistor; The negative input terminal of the operational amplifier is electrically connected to the output terminal of the amplified spontaneous radiation entropy source module, the positive input terminal of the operational amplifier is grounded, and the output terminal of the operational amplifier is electrically connected to the input terminal of the filter; The feedback resistor is connected in parallel between the negative input terminal and the output terminal of the operational amplifier.

6. The quantum random signal generator according to claim 1, characterized in that: Also includes: Controller; The output end of the controller is electrically connected to the input end of the digital control reference voltage generating module, and the controller controls the digital control reference voltage generating module to output a reference voltage range.

7. The quantum random signal generator according to claim 6, characterized in that: Also includes: Human-computer interaction module; The input end of the controller is electrically connected to the output end of the human-computer interaction module, and the controller controls the digital control reference voltage generation module to output a corresponding reference voltage range according to the reference voltage input by the human-computer interaction module.

8. The quantum random signal generator according to claim 7, characterized in that: The human-computer interaction module includes a mechanical button, a digital key or a touch display screen.

9. The quantum random signal generator according to claim 1, characterized in that: The quantum random number generation module includes one or more FPGA chips.

10. The quantum random signal generator according to claim 1, characterized in that: Also includes: Circuit boards; The amplified spontaneous radiation entropy source module, the transimpedance amplification and filtering module, the analog-to-digital signal conversion module, the quantum random number generation module, the digital control reference voltage generation module and the digital-to-analog signal conversion module are all integrated on the circuit board.

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