A hybrid integrated quantum random number generator and generation system

Abstract

The present invention discloses a hybrid integrated quantum random number generating device and generating system, comprising a local oscillator light source and an optical signal processing module, wherein the local oscillator light source is connected to an input end of the optical signal processing module, and further comprising a stray light eliminator connected to a vacuum state optical signal input end of the optical signal processing module; the present invention has the advantages of adding a stray light eliminator device to the vacuum state optical signal input end to ensure that the vacuum state optical field is not disturbed, that is, to ensure the quantum randomness of the random source, reducing the volume, reducing the power consumption, and having a high degree of integration.

Description

Technical Field

[0001] The present invention relates to the field of quantum random numbers, and more specifically to a hybrid integrated quantum random number generating device and generating system. Background Art

[0002] As a widely used basic resource, random numbers are of great value in cryptography, finance, artificial intelligence, information security and other fields. Generally, random numbers are divided into two categories: pseudo-random numbers and physical random numbers. Pseudo-random numbers are generated by computers using fixed algorithms to repeatedly iterate the initial seeds, so they are periodic. As long as their algorithms and seeds are obtained, pseudo-random numbers can be deciphered. Physical random numbers are generated based on physical random phenomena, including classical random phenomena and quantum random phenomena. Typical classical random phenomena, such as atmospheric noise, electronic thermal noise, oscillator jitter, etc., can be used as random sources to extract physical random numbers. However, the randomness of classical physical random phenomena is difficult to be rigorously theoretically deduced and proved, and limited by the bandwidth of classical physical random entropy sources, the random number generation rate of the above scheme is difficult to reach the Gbps level. Under certain specific conditions, it is also possible to replicate classical physical random sources by obtaining key parameter information of classical physical random sources. The randomness of quantum random numbers comes from quantum mechanics. For example, the non-determinism caused by unpredictable measurement collapse in the quantum world is a physical process that truly meets the characteristics of unpredictability and non-replicability. In other words, quantum random numbers are the only method so far that can be rigorously proven in theory to produce completely unpredictable random sequences.

[0003] Quantum random number generators are mainly divided into two categories according to the different random sources used: discrete and continuous. The earliest research was on discrete quantum random number generators, which mainly use single-photon sources, entangled photon pairs and other signals as carriers of random variables. The principle of this scheme is simple, easy to model, and has obvious quantum non-determinism. However, due to the line width of the random source and the detection efficiency of the single-photon detector, the random number generation rate of this scheme is lower than that of the continuous quantum random number generator. The continuous quantum random number generator uses laser phase fluctuations, vacuum shot noise, etc. as entropy sources. The light source intensity is no longer at the single-photon level, and the corresponding detector rate and detection efficiency are no longer limited by the light source, thereby greatly improving the random number generation rate, and can achieve a random number generation rate of the order of Gbps.

[0004] The quantum random number scheme based on the vacuum state has received extensive attention and research due to its advantages such as simple device structure, strong environmental adaptability, and suitable miniaturization. The patent application document with publication number CN108536424A provides a quantum random number generator based on the vacuum state, including: a light source, a beam splitter, a first detector, a second detector, a subtractor, and an analog-to-digital converter. The light source outputs the generated coherent light to the first input end of the beam splitter; the second input end of the beam splitter receives the vacuum state; the beam splitter divides the coherent light and the vacuum state into two light signals and outputs them to the first and second detectors respectively; the first detector converts the light signal into a first current signal and outputs it to the first input end of the subtractor; the second detector converts the light signal into a second current signal and outputs it to the second input end of the subtractor; the subtractor outputs the difference between the received first current signal and the second current signal to the converter; the converter converts the difference into a discrete digital signal. This scheme extracts the vacuum state random signal through homodyne detection and converts it into a random digital signal. This scheme is implemented using discrete devices, with large overall size and high power consumption. Moreover, since it is difficult to achieve an accurate 50:50 splitting ratio in the beam splitter, there will be a difference in the power of the two signal beams output by the beam splitter, resulting in the inability of homodyne detection to completely eliminate the local oscillator light, affecting the extraction of the vacuum state optical signal.

[0005] The patent application document with publication number CN108491185A discloses a high-speed real-time quantum random number generator based on optoelectronic hybrid integration, including: a light source, a random number chip and an electronic readout circuit connected in sequence, wherein: the random number chip includes: an optical beam splitter, a first and a second optical attenuator, a first and a second photodetector and a transimpedance amplifier; the two output ends of the optical beam splitter are independently connected to the first and the second optical attenuator respectively; the output end of the first optical attenuator is connected to the first photodetector, and the output end of the second optical attenuator is connected to the second photodetector; the output ends of the first and the second photodetector are connected to the transimpedance amplifier. This scheme uses silicon-based waveguide technology to achieve chip integration of optical devices and electronic devices. However, the random number chip part of this scheme only integrates optical signal post-processing devices, and the light source part still needs to be externally connected, wherein a laser is connected to one input end of the beam splitter, and the continuous laser output by the laser is used as the local oscillator light source, and the other end of the beam splitter is vacant, that is, as vacuum state light. Due to the existence of end face reflection in actual devices, whether discrete devices or integrated chips are used, during the transmission of optical signals, some reflected stray light will enter the vacant input end of the beam splitter, which will interfere with the vacuum light field. Summary of the invention

[0006] The technical problem to be solved by the present invention is how to eliminate the interference signal entering the vacuum state light field and ensure good quantum randomness.

[0007] The present invention solves the above technical problems through the following technical solutions: a hybrid integrated quantum random number generating device, comprising a local oscillator light source and an optical signal processing module, wherein the local oscillator light source is connected to an input end of the optical signal processing module, and further comprising a stray light eliminator connected to the vacuum state optical signal input end of the optical signal processing module. By arranging a stray light elimination module at the input end of the optical signal processing module, the interference signal entering the vacuum state optical field is eliminated to ensure good quantum randomness.

[0008] Preferably, the optical signal processing module includes a beam splitter, a first adjustable optical attenuator, a second adjustable optical attenuator, a first photodetector, a second photodetector, and a transimpedance amplifier. The local oscillator light source is connected to an input end of the beam splitter. The beam splitter has two outputs, and its two output ends are respectively connected to the first adjustable optical attenuator and the second adjustable optical attenuator. The output ends of the first adjustable optical attenuator and the second adjustable optical attenuator are respectively connected to the first photodetector and the second photodetector. The output ends of the first photodetector and the second photodetector are connected to the input end of the transimpedance amplifier. The other input end of the beam splitter serves as a vacuum state optical signal input end, which is connected to the stray light eliminator. The output end of the transimpedance amplifier serves as the output end of the optical signal processing module.

[0009] Preferably, the splitting ratio of the beam splitter is 50:50.

[0010] As a specific implementation of the present invention, the local oscillator light source, the stray light eliminator and the optical signal processing module are integrated into one chip.

[0011] Preferably, the local oscillator light source is optically coupled to an input end of the beam splitter by lens coupling.

[0012] Preferably, a grating structure is etched on a waveguide at an input end of the beam splitter, and the local oscillator light source is optically coupled to the grating structure through a flip-chip bonding process.

[0013] As another specific implementation of the present invention, the stray light eliminator and the optical signal processing module are integrated into one chip.

[0014] Preferably, the local oscillator light source is connected to an input end of the beam splitter via an optical fiber.

[0015] In the above two specific embodiments, the stray light eliminator, the beam splitter, the first adjustable optical attenuator, the second adjustable optical attenuator, the first photodetector and the second photodetector are monolithically integrated through a silicon process platform compatible with CMOS process.

[0016] As another specific implementation scheme of the present invention, the local oscillator light source, stray light eliminator, beam splitter, first adjustable optical attenuator, second adjustable optical attenuator, first photodetector and second photodetector are monolithically integrated through a III-V process platform, i.e., using an indium phosphide substrate.

[0017] Preferably, the stray light eliminator is connected to the other input end of the beam splitter through a silicon waveguide, one output end of the beam splitter, the first adjustable optical attenuator and the first photodetector are connected through a silicon waveguide, and the other output end of the beam splitter, the second adjustable optical attenuator and the second photodetector are connected through a silicon waveguide.

[0018] Preferably, the cathode bonding point or anode bonding point of the first photodetector and the anode bonding point or cathode bonding point of the second photodetector are used as signal output terminals in the form of common electrode bonding points, and are connected to the input bonding point of the transimpedance amplifier by wire welding.

[0019] Preferably, the chip is in a butterfly package form.

[0020] Preferably, the local oscillator light source is a laser.

[0021] Preferably, the stray light eliminator is any one of an optical attenuator, a photodetector or a curved optical waveguide with a small curvature radius.

[0022] The present invention also provides a generation system using a hybrid integrated quantum random number generator, comprising a hybrid integrated quantum random number generator and an analog-to-digital converter, wherein the output end of the hybrid integrated quantum random number generator is connected to the input end of the analog-to-digital converter.

[0023] Preferably, the generation system of the hybrid integrated quantum random number generation device also includes a post-processor, and the input end of the post-processor is connected to the output end of the analog-to-digital converter.

[0024] Preferably, the post-processor is a programmable logic gate array.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] 1) Add a stray light elimination device at the input end of the vacuum state optical signal to ensure that the vacuum state light field is not disturbed, that is, to ensure the quantum randomness of the random source.

[0027] 2) The hybrid integrated quantum random number generation chip realizes the overall integration of the quantum random source and the quantum random source detection device, which reduces the volume and power consumption and has high integration. The device can directly output the vacuum state optical signal detection results.

[0028] 3) The splitting ratio of the beam splitter is 50:50. There will be no difference in the power of the two signal beams output by the beam splitter. Homodyne detection can completely eliminate the local oscillator light, which is beneficial to the extraction of vacuum state optical signals.

[0029] 4) Provide a quantum random number generating device, the post-processor processes the original quantum random number output by the analog-to-digital converter, removes interference such as electronic noise of the actual device, and further optimizes the random characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0031] Figure 1 is a schematic diagram of a hybrid integrated quantum random number generating device disclosed in an embodiment of the present invention;

[0032] Figure 2 It is a schematic diagram of a quantum random number generating chip of a hybrid integrated quantum random number generating device disclosed in Embodiment 1 and Embodiment 3 of the present invention;

[0033] Figure 3 It is a schematic diagram of the packaging of a hybrid integrated quantum random number generating device disclosed in Embodiment 1 and Embodiment 3 of the present invention;

[0034] Figure 4 This is a schematic diagram of the packaging of a hybrid integrated quantum random number generating device disclosed in Example 2 of the present invention;

[0035] Figure 5 It is a schematic diagram of a generation system of a hybrid integrated quantum random number generation device disclosed in Example 4 of the present invention.

[0036] The numbers in the figure represent the corresponding parts names:

[0037] 1. Local oscillator light source 2. Stray light eliminator 3. Beam splitter

[0038] 4. First adjustable optical attenuator 5. Second adjustable optical attenuator 6. First photodetector

[0039] 7. Second photodetector 8. Transimpedance amplifier

[0040] 10. Quantum random number generator 20. Analog-to-digital converter 30. Post-processor DETAILED DESCRIPTION

[0041] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0042] like Figure 1 As shown, a hybrid integrated quantum random number generating device includes a local oscillator light source 1, a stray light eliminator 2 and an optical signal processing module, wherein the optical signal processing module includes a beam splitter 3, a first adjustable optical attenuator 4, a second adjustable optical attenuator 5, a first photodetector 6, a second photodetector 7 and a transimpedance amplifier 8.

[0043] The local oscillator light source 1 is a laser, and the local oscillator light source 1 is connected to an input end of the beam splitter 3, and the local oscillator light output by the local oscillator light source 1 is coupled to an input end of the beam splitter 3; the other input end of the beam splitter 3 receives a vacuum state optical signal and is connected to the stray light eliminator 2. The beam splitter 3 has two outputs, and its two output ends are respectively connected to a first adjustable optical attenuator 4 and a second adjustable optical attenuator 5, and the output ends of the first adjustable optical attenuator 4 and the second adjustable optical attenuator 5 are respectively connected to a first photodetector 6 and a second photodetector 7. The output ends of the first photodetector 6 and the second photodetector 7 are connected to the input end of the transimpedance amplifier 8.

[0044] As a preferred solution of the present invention, the local oscillator light source 1 is a laser.

[0045] As a preferred embodiment of the present invention, the stray light eliminator 2 is a light energy consuming device such as an optical attenuator, a photodetector or a curved optical waveguide with a small curvature radius, and its function is to eliminate the stray light that enters the vacuum light field due to reflection from the end face of the device, thereby avoiding interference with the vacuum light signal.

[0046] As a preferred solution of the present invention, the splitting ratio of the beam splitter 3 is 50:50. When the splitting ratio is 50:50, there will be no difference in the power of the two signal beams output by the beam splitter, and homodyne detection can completely eliminate the local oscillation light, which is conducive to the extraction of vacuum state optical signals.

[0047] The working process of a hybrid integrated quantum random number generating device disclosed in the present invention is as follows: the local oscillator light output by the local oscillator light source 1 is coupled to an input end of a beam splitter 3, and the other input end of the beam splitter 3 receives a vacuum state optical signal and is connected to the stray light eliminator 2, and the stray light eliminator 2 eliminates the stray light entering the vacuum state optical field due to the reflection of the device end face, so as to avoid the vacuum state optical signal from being interfered. The first adjustable optical attenuator 4 and the second adjustable optical attenuator 5 are used to adjust the power of the two optical signals, compensate for the errors in the splitting ratio of the beam splitter and the responsiveness of the first photodetector 6 and the second photodetector 7. The first photodetector 6 and the second photodetector 7 convert the optical signal into an electrical signal. The output currents of the first photodetector 6 and the second photodetector 7 are subtracted to obtain a differential current and input into a transimpedance amplifier 8. The transimpedance amplifier 8 amplifies the differential detection signal, and its output is used as the vacuum state optical signal detection result.

[0048] A hybrid integrated quantum random number generator disclosed in the present invention can realize a variety of hybrid integration forms. Different hybrid integration forms form different random number generation chips. Different devices in the quantum random number generator are integrated in different combinations to form different quantum random number generation chips. Unintegrated devices are connected through external wiring. A highly integrated random number generation chip integrates a local oscillator light source 1, a stray light eliminator 2, a beam splitter 3, a first adjustable optical attenuator 4, a second adjustable optical attenuator 5, a first photodetector 6, a second photodetector 7, and a transimpedance amplifier 8. The various hybrid integration forms of the present invention are introduced below through specific embodiments.

[0049] Example 1

[0050] Embodiment 1 provides a hybrid integration form with a high degree of integration, integrating the local oscillator light source 1, the stray light eliminator 2 and the optical signal processing module into one chip, that is, the local oscillator light source 1, the stray light eliminator 2, the beam splitter 3, the first adjustable optical attenuator 4, the second adjustable optical attenuator 5, the first photodetector 6, the second photodetector 7 and the transimpedance amplifier 8 are integrated into a quantum random number generation chip; the structure of the quantum random number generation chip is shown in FIG. Figure 2As shown, specifically, the local oscillator light source 1 can be optically coupled with an input end of the beam splitter 3 by lens coupling, or a grating structure can be etched on a silicon waveguide at an input end of the beam splitter 3, and the local oscillator light source 1 is optically coupled with the grating by flip-chip (flip-chip bonding process). The stray light eliminator 2, the beam splitter 3, the first adjustable optical attenuator 4, the second adjustable optical attenuator 5, the first photodetector 6 and the second photodetector 7 are monolithically integrated through a silicon process platform compatible with the CMOS process. The stray light eliminator 2 is connected to the other input end of the beam splitter 3 through a silicon waveguide, an output end of the beam splitter 3, the first adjustable optical attenuator 4 and the first photodetector 6 are connected through a silicon waveguide, the other output end of the beam splitter 3, the second adjustable optical attenuator 5 and the second photodetector 7 are connected through a silicon waveguide, and the cathode pad (welding point) or anode pad of the first photodetector 6 and the anode pad or cathode pad of the second photodetector 7 are connected as a signal output end through a common electrode pad and the input end pad of the transimpedance amplifier 8 through wire-bonding.

[0051] Specifically, the local oscillator light source 1 is a distributed feedback laser (DFB).

[0052] Specifically, the beam splitter 3 is a multi-mode interferometer.

[0053] Specifically, the package of the hybrid integrated device is a butterfly package, such as Figure 3 As shown, Figure 3 a is a front view of the package of the hybrid integrated device disclosed in Example 1 of the present invention, Figure 3 b is a side view of the package of the hybrid integrated device disclosed in Example 1 of the present invention, Figure 3 c is a top view of the package of the hybrid integrated device disclosed in Example 1 of the present invention.

[0054] Example 2

[0055] The difference between Example 2 of the present invention and Example 1 is that:

[0056] The stray light eliminator 2 is integrated with the optical signal processing module into a chip, that is, the stray light eliminator 2, the beam splitter 3, the first adjustable optical attenuator 4, the second adjustable optical attenuator 5, the first photodetector 6, the second photodetector 7 and the transimpedance amplifier 8 are integrated into a quantum random number generation chip, and the local oscillator light source 1 is not integrated. The local oscillator light source 1 is connected to an input end of the beam splitter 3 through an optical fiber, wherein the integration method of the stray light eliminator 2, the beam splitter 3, the first adjustable optical attenuator 4, the second adjustable optical attenuator 5, the first photodetector 6, the second photodetector 7 and the transimpedance amplifier 8 is the same as that of Example 1.

[0057] Specifically, the package of the hybrid integrated device is a butterfly package, such as Figure 4 As shown, Figure 4 a is a front view of the package of the hybrid integrated device disclosed in Example 2 of the present invention, Figure 4 b is a side view of the package of the hybrid integrated device disclosed in Example 2 of the present invention, Figure 4 c is a top view of the package of the hybrid integrated device disclosed in Example 2 of the present invention.

[0058] Example 3

[0059] Compared with Example 1, Example 3 integrates the local oscillator light source 1, the stray light eliminator 2 and the optical signal processing module into one chip, that is, the local oscillator light source 1, the stray light eliminator 2, the beam splitter 3, the first adjustable optical attenuator 4, the second adjustable optical attenuator 5, the first photodetector 6, the second photodetector 7 and the transimpedance amplifier 8 are integrated into a quantum random number generation chip. The structure of the quantum random number generation chip is shown in FIG. Figure 2 As shown, the package is the same as that of embodiment 1, both are butterfly package forms, so its package diagram is the same as that of embodiment 1, as shown in FIG. Figure 3 However, the integration method of Example 3 is different from that of Example 1. Specifically, the local oscillator light source 1, the stray light eliminator 2, the beam splitter 3, the first adjustable optical attenuator 4, the second adjustable optical attenuator 5, the first photodetector 6 and the second photodetector 7 are monolithically integrated through a III-V group process platform, i.e., using an InP (indium phosphide) substrate.

[0060] Example 4

[0061] The present invention also provides a generation system using the hybrid integrated quantum random number generation device described in any one of Embodiments 1 to 3:

[0062] like Figure 5 As shown, the generation system of the hybrid integrated quantum random number generator includes a hybrid integrated quantum random number generator 10, an analog-to-digital converter 20 and a post-processor 30, wherein the output end of the transimpedance amplifier 8 of the hybrid integrated quantum random number generator 10 is connected to the input end of the analog-to-digital converter 20, and the input end of the post-processor 30 is connected to the output end of the analog-to-digital converter 20. The analog-to-digital converter 20 is connected to the output end of the transimpedance amplifier 8, collects and quantifies the vacuum state light signal detection results and converts them into digital information, which is input into the post-processor 30 (such as FPGA) and processed by the random number generation method to obtain the final random number. The post-processor 30 processes the original quantum random number output by the analog-to-digital converter 20, removes interference such as electronic noise of the actual device, and further optimizes the random characteristics.

[0063] Specifically, the post-processor 30 is a programmable logic gate array.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hybrid integrated quantum random number generator, comprising a local oscillator light source and an optical signal processing module, wherein the local oscillator light source is connected to an input end of the optical signal processing module, characterized in that: It also includes a stray light eliminator connected to the vacuum state optical signal input end of the optical signal processing module, which is used to eliminate interference signals entering the vacuum state optical field.

2. A hybrid integrated quantum random number generator according to claim 1, characterized in that: The optical signal processing module includes a beam splitter, a first adjustable optical attenuator, a second adjustable optical attenuator, a first photodetector, a second photodetector, and a transimpedance amplifier. The local oscillator light source is connected to an input end of the beam splitter. The beam splitter has two outputs, and its two output ends are respectively connected to the first adjustable optical attenuator and the second adjustable optical attenuator. The output ends of the first adjustable optical attenuator and the second adjustable optical attenuator are respectively connected to the first photodetector and the second photodetector. The output ends of the first photodetector and the second photodetector are connected to the input end of the transimpedance amplifier. The other input end of the beam splitter serves as a vacuum state optical signal input end, which is connected to the stray light eliminator. The output end of the transimpedance amplifier serves as the output end of the optical signal processing module.

3. A hybrid integrated quantum random number generator according to claim 2, characterized in that: The beam splitter has a splitting ratio of 50:

50.

4. A hybrid integrated quantum random number generator according to claim 2, characterized in that: The local oscillator light source, the stray light eliminator and the optical signal processing module are integrated into one chip.

5. A hybrid integrated quantum random number generator according to claim 4, characterized in that: The local oscillator light source is optically coupled to an input end of the beam splitter by lens coupling.

6. A hybrid integrated quantum random number generator according to claim 4, characterized in that: A grating structure is etched on a waveguide at an input end of the beam splitter, and the local oscillator light source is optically coupled with the grating structure through a flip-chip bonding process.

7. A hybrid integrated quantum random number generator according to claim 4, characterized in that: The local oscillator light source, the stray light eliminator, the beam splitter, the first adjustable optical attenuator, the second adjustable optical attenuator, the first photodetector and the second photodetector can be monolithically integrated through a III-V group process platform, that is, using an indium phosphide substrate.

8. A hybrid integrated quantum random number generator according to claim 2, characterized in that: The stray light eliminator and the optical signal processing module are integrated into one chip.

9. A hybrid integrated quantum random number generator according to claim 8, characterized in that: The local oscillator light source is connected to an input end of the beam splitter through an optical fiber.

10. A hybrid integrated quantum random number generator according to claim 4 or 8, characterized in that: The stray light eliminator, the beam splitter, the first adjustable optical attenuator, the second adjustable optical attenuator, the first photodetector and the second photodetector can be monolithically integrated through a silicon process platform compatible with the CMOS process.

11. A hybrid integrated quantum random number generator according to claim 2, characterized in that: The stray light eliminator is connected to the other input end of the beam splitter through a silicon waveguide, an output end of the beam splitter, a first adjustable optical attenuator and a first photodetector are connected through a silicon waveguide, and the other output end of the beam splitter, a second adjustable optical attenuator and a second photodetector are connected through a silicon waveguide.

12. A hybrid integrated quantum random number generator according to claim 2, characterized in that: The cathode bonding point or anode bonding point of the first photodetector and the anode bonding point or cathode bonding point of the second photodetector are used as signal output terminals in the form of common electrode bonding points, and are connected to the input bonding point of the transimpedance amplifier in the form of wire welding.

13. A hybrid integrated quantum random number generator according to claim 4 or 8, characterized in that: The chip is in a butterfly package form.

14. A hybrid integrated quantum random number generator according to claim 1, characterized in that: The local oscillator light source is a laser.

15. A hybrid integrated quantum random number generator according to claim 1, characterized in that: The stray light eliminator is any one of an optical attenuator, a photodetector or a curved optical waveguide with a small curvature radius.

16. A generation system using the hybrid integrated quantum random number generator according to any one of claims 1 to 15, characterized in that: The invention comprises a hybrid integrated quantum random number generating device and an analog-to-digital converter, wherein the output end of the hybrid integrated quantum random number generating device is connected to the input end of the analog-to-digital converter.

17. The generating system according to claim 16, characterized in that: The generation system of the hybrid integrated quantum random number generator also includes a post-processor, and the input end of the post-processor is connected to the output end of the analog-to-digital converter.

18. The generating system according to claim 17, characterized in that: The post-processor is a programmable logic gate array.

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