Clock signal generation method, clock and clock system

Abstract

The invention provides a clock signal generation method, a clock and a clock system, and the method comprises the steps: determining a target oscillator in a plurality of adjacent clock oscillators, and the plurality of clock oscillators are electrically connected; aiming at any initial driving voltage signal in the plurality of different initial driving voltage signals, reading a first current signal of each time clock oscillator under the condition that the initial driving voltage signals are respectively applied to the plurality of time clock oscillators; for each time-clock oscillator, performing fitting processing on the plurality of first current signals to obtain oscillator parameters of the time-clock oscillator; generating a target driving voltage signal according to the oscillator parameters of the plurality of clock oscillators; and under the condition that the target driving voltage signal is applied to the target oscillator, reading a target clock signal generated by the associated oscillator related to the target oscillator.

Description

Technical Field

[0001] The present invention relates to the field of wireless sensing technology, and more specifically, to a clock signal generation method, a clock, and a clock system. Background Art

[0002] As a key tool for measuring time, the clock is not only related to the rhythm of daily life but also plays a crucial role in the development of modern science and technology. It supports the global satellite navigation system, promotes the progress of quantum information communication technology, and plays an irreplaceable role in testing physics beyond the standard model. To further meet the needs of scientific research, it is necessary to improve the stability of the clock. Summary of the Invention

[0003] In view of this, embodiments of the present invention provide a clock signal generation method, a clock, and a clock system.

[0004] One aspect of the embodiments of the present invention provides a clock signal generation method, including:

[0005] Determine a target oscillator among a plurality of adjacent clock oscillators, wherein the plurality of clock oscillators are electrically connected to each other;

[0006] For any one of a plurality of different initial drive voltage signals, when the initial drive voltage signal is respectively applied to the plurality of clock oscillators, read the first current signal of each clock oscillator;

[0007] For each clock oscillator, perform fitting processing on the plurality of first current signals to obtain the oscillator parameters of the clock oscillator;

[0008] Generate a target drive voltage signal according to the oscillator parameters of the plurality of clock oscillators;

[0009] When the target drive voltage signal is applied to the target oscillator, read the target clock signal generated by the associated oscillator related to the target oscillator.

[0010] According to an embodiment of the present invention, when the initial drive voltage signal is respectively applied to the plurality of clock oscillators, reading the first current signal of each clock oscillator includes:

[0011] Respectively apply the initial drive voltage signal to the plurality of clock oscillators so that the plurality of clock oscillators vibrate under the action of a magnetic field;

[0012] For each clock oscillator, when the clock oscillator cuts the magnetic induction line during vibration, read the first current signal generated by the clock oscillator.

[0013] According to an embodiment of the present invention, fitting processing is performed on a plurality of the above-mentioned first current signals to obtain the oscillator parameters of the above-mentioned clock oscillator, including:

[0014] For each of the above-mentioned first current signals, the signal amplitude of the above-mentioned first current signal is read, wherein the above-mentioned signal amplitude represents the oscillator spectrum of the above-mentioned clock oscillator;

[0015] Lorentz fitting is performed on a plurality of the above-mentioned oscillator spectra to obtain the above-mentioned oscillator parameters.

[0016] According to an embodiment of the present invention, the above-mentioned oscillator parameters include a resonance frequency.

[0017] According to an embodiment of the present invention, when the number of the above-mentioned clock oscillators is three, a plurality of the above-mentioned clock oscillators are respectively the associated oscillator, the target oscillator, and the related oscillator.

[0018] Among them, generating a target drive voltage signal according to the oscillator parameters of a plurality of the above-mentioned clock oscillators includes:

[0019] Generating a first resonance frequency according to the resonance frequency of the above-mentioned associated oscillator and the resonance frequency of the above-mentioned target oscillator;

[0020] Generating a second resonance frequency according to the resonance frequency of the above-mentioned target oscillator and the resonance frequency of the above-mentioned related oscillator;

[0021] Generating the above-mentioned target drive voltage signal according to the above-mentioned first resonance frequency and the above-mentioned second resonance frequency.

[0022] According to an embodiment of the present invention, the above-mentioned oscillator parameters further include an initial spectral linewidth.

[0023] According to an embodiment of the present invention, the above-mentioned target drive voltage signal is generated in the following manner:

[0024] When different initial voltage signals are applied to the above-mentioned target oscillator, a first relational expression is determined according to a plurality of second current signals read from the above-mentioned associated oscillator, wherein the above-mentioned first relational expression represents the relationship between the coupling strength and the above-mentioned initial voltage signal, and the above-mentioned initial voltage signal includes an initial coupling signal having the above-mentioned first resonance frequency and a DC signal;

[0025] When different initial pump signals are applied to the above-mentioned target oscillator, a second relational expression is determined according to a plurality of third current signals read from the above-mentioned related oscillator, wherein the above-mentioned second relational expression represents the relationship between the intermediate spectral linewidth corresponding to the above-mentioned target oscillator when the above-mentioned initial pump signal is applied and the initial spectral linewidths corresponding to the above-mentioned target oscillator and the above-mentioned related oscillator respectively when the above-mentioned initial drive voltage signal is applied;

[0026] Predict a target pump signal based on the above second relational expression, where the intermediate spectral linewidth is less than a preset value when the above target pump signal is applied;

[0027] Determine the voltage range of the target coupling signal according to the above first relational expression, the initial spectral linewidth of the above associated oscillator, and the above multiple associated spectral linewidths, so as to generate the above target drive voltage signal according to the above target coupling signal and the above target pump signal, where each of the above associated spectral linewidths corresponding to the relevant oscillator is less than the above preset value.

[0028] According to an embodiment of the present invention, determining the first relational expression according to multiple second current signals read from the above associated oscillator includes:

[0029] When different initial voltage signals are applied to the above target oscillator, the above target oscillator vibrates the above associated oscillator through electrostatic force under the drive of different above initial voltage signals;

[0030] For each of the above initial voltage signals, generate an initial spectrum according to the second current signal read from the above associated oscillator to determine the first splitting width of the spectral peak on the above initial spectrum, where the above first splitting width represents the first coupling strength;

[0031] Perform a fitting process on multiple above initial voltage signals and the first coupling strength corresponding to each of the above initial voltage signals to obtain the above first relational expression.

[0032] According to an embodiment of the present invention, determining the second relational expression according to multiple third current signals read from the above relevant oscillator includes:

[0033] When different initial pump signals are applied to the above target oscillator, the above target oscillator vibrates the above relevant oscillator through electrostatic force under the drive of different above initial pump signals;

[0034] For each of the above initial pump signals, generate an intermediate spectrum according to the third current signal read from the above relevant oscillator to determine the second splitting width of the spectral peak on the above intermediate spectrum, where the above second splitting width represents the second coupling strength;

[0035] Perform a fitting process on multiple above initial pump signals and the second coupling strength corresponding to each of the above initial pump signals to obtain a transition relational expression;

[0036] Generate the above second relational expression according to the above transition relational expression, the above intermediate spectral linewidth, the initial spectral linewidth corresponding to the above relevant oscillator, and the initial spectral linewidth corresponding to the above target oscillator.

[0037] According to an embodiment of the present invention, generating the target drive voltage signal based on the above-mentioned target coupling signal and the above-mentioned target pump signal includes:

[0038] Generating a plurality of first coupling signals with different voltages according to the voltage range of the above-mentioned target coupling signal;

[0039] For each of the above-mentioned first coupling signals, generating a first drive voltage signal based on the above-mentioned first coupling signal and the above-mentioned target pump signal, wherein the frequency of the above-mentioned first drive voltage signal is generated according to the above-mentioned first resonance frequency and the above-mentioned second resonance frequency;

[0040] Applying the above-mentioned first drive voltage signal to the above-mentioned target oscillator and reading the initial clock signal on the above-mentioned associated oscillator;

[0041] When the above-mentioned initial clock signal meets the preset conditions, determining the above-mentioned first drive voltage signal as the above-mentioned target drive voltage signal.

[0042] Another aspect of the embodiment of the present invention provides a clock, including:

[0043] A plurality of clock oscillators, wherein the plurality of above-mentioned clock oscillators are electrically connected, and one of the plurality of above-mentioned clock oscillators is a target oscillator;

[0044] Wherein, when a target drive voltage signal is applied to the above-mentioned target oscillator, reading a stable target clock signal of continuous oscillation generated by an associated oscillator related to the above-mentioned target oscillator, wherein the above-mentioned target drive voltage signal is generated according to the oscillator parameters of the plurality of above-mentioned clock oscillators, and the oscillator parameter of each of the above-mentioned clock oscillators is obtained by fitting a plurality of first current signals related to the above-mentioned clock oscillator, and the plurality of above-mentioned first current signals are read from the above-mentioned clock oscillator when different initial drive voltage signals are applied to the above-mentioned target oscillator.

[0045] Another aspect of the embodiment of the present invention provides a clock system, including:

[0046] The clock as above;

[0047] A voltage input device configured to input an initial drive voltage signal or a target drive voltage signal to a target oscillator in the above-mentioned clock so that the above-mentioned clock generates a first current signal or a target clock signal;

[0048] A clock signal reading device configured to read the above-mentioned first current signal from each clock oscillator in the above-mentioned clock, or read the above-mentioned target clock signal from an associated oscillator related to the above-mentioned target oscillator.

[0049] According to an embodiment of the present invention, by applying a plurality of different initial drive voltage signals to a plurality of clock oscillators respectively, so that each clock oscillator generates different first current signals in response to each initial drive voltage signal, calculating the oscillator parameters of the clock oscillator according to the plurality of first current signals of each clock oscillator, and thereby determining a target drive voltage signal for a target clock signal based on the oscillator parameters of the plurality of clock oscillators. The target drive voltage signal determined by the clock signal generation method of the present invention can make the clock system at the singularity of the non-Hermitian system, and thereby can continuously output a stable target clock signal, improving the generation accuracy and stability of the target clock signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Through the following description of the embodiments of the present invention with reference to the drawings, the above and other objects, features and advantages of the present invention will become clearer. In the drawings:

[0051] Figure 1 FIG. shows a flowchart of a clock signal generation method according to an embodiment of the present invention;

[0052] Figure 2 FIG. shows a waveform schematic diagram of a target clock signal according to an embodiment of the present invention;

[0053] Figure 3 FIG. shows a flowchart of the generation of a target drive voltage signal according to an embodiment of the present invention;

[0054] Figure 4 FIG. shows a schematic diagram of the composition of a clock system according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0055] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In the following detailed description, for the sake of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention. However, obviously, one or more embodiments can also be implemented without these specific details. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0056] The terms used herein are merely for describing specific embodiments and are not intended to limit the present invention. The terms "including", "comprising", etc. used herein indicate the presence of the described features, steps, operations and / or components, but do not exclude the presence or addition of one or more other features, steps, operations or components.

[0057] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those of ordinary skill in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

[0058] In cases where expressions similar to "at least one of A, B, and C, etc." are used, generally, it should be interpreted according to the meaning that those of ordinary skill in the art usually understand such expressions (for example, "a system having at least one of A, B, and C" should include, but not be limited to, a system having only A, only B, only C, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.). In cases where expressions similar to "at least one of A, B, or C, etc." are used, generally, it should be interpreted according to the meaning that those of ordinary skill in the art usually understand such expressions (for example, "a system having at least one of A, B, or C" should include, but not be limited to, a system having only A, only B, only C, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.).

[0059] The clock signal is generated by a highly stable reference system. To improve the stability of the clock, an effective method is to select a reference system with a higher frequency and a narrower linewidth, such as microwave atomic clocks and optical clocks. They both utilize the energy level transitions of electrons inside atoms as the reference system. However, the current higher-frequency reference systems are difficult to read out due to the limitation of the frequency comb linewidth. At the same time, atomic clocks also have problems such as large size, high energy consumption, and high cost.

[0060] Another effective strategy is to achieve a narrower relative linewidth and a longer service life by minimizing system losses. However, there are still significant challenges in system operation, measurement, and error suppression of ultra-precise clock systems.

[0061] Non-Hermitian physics focuses on studying systems in which energy is not conserved due to environmental interactions. In non-Hermitian systems, singularities are the key critical points where unique physical phenomena occur, and these singularities are usually caused by certain parameters becoming undefined or tending to infinity during the modulation process. In particular, the so-called exceptional points (EPs), at such singularities, the eigenenergies and eigenstates are simultaneously degenerate, resulting in a series of remarkable phenomena such as enhanced sensitivity, chiral mode switching, and coherent perfect absorption. Therefore, the unique properties of singularities in non-Hermitian systems have the potential to improve clock performance.

[0062] In view of this, embodiments of the present invention provide a clock signal generation method, a clock, and a clock system. The method includes determining a target oscillator among a plurality of adjacent clock oscillators, where the plurality of clock oscillators are electrically connected; for any one of a plurality of different initial drive voltage signals, reading a first current signal of each clock oscillator when the initial drive voltage signal is applied to the target oscillator; for each clock oscillator, performing a fitting process on the plurality of first current signals to obtain an oscillator parameter of the clock oscillator; generating a target drive voltage signal according to the oscillator parameters of the plurality of clock oscillators; and reading a target clock signal generated by an associated oscillator related to the target oscillator when the target drive voltage signal is applied to the target oscillator.

[0063] Figure 1 FIG. shows a flowchart of a clock signal generation method according to an embodiment of the present invention. Figure 2 FIG. shows a waveform schematic diagram of a target clock signal according to an embodiment of the present invention.

[0064] According to an embodiment of the present invention, as Figure 1 shown, the clock signal generation method includes operations S101 to S105.

[0065] In operation S101, a target oscillator is determined among a plurality of adjacent clock oscillators, where the plurality of clock oscillators are electrically connected.

[0066] In operation S102, for any one of a plurality of different initial drive voltage signals, when the initial drive voltage signal is applied to the plurality of clock oscillators respectively, a first current signal of each clock oscillator is read.

[0067] In operation S103, for each clock oscillator, a fitting process is performed on the plurality of first current signals to obtain an oscillator parameter of the clock oscillator.

[0068] In operation S104, a target drive voltage signal is generated according to the oscillator parameters of the plurality of clock oscillators.

[0069] In operation S105, when the target drive voltage signal is applied to the target oscillator, a target clock signal generated by an associated oscillator related to the target oscillator is read.

[0070] According to an embodiment of the present invention, the number of clock oscillators can be set according to actual needs. In this embodiment, 3 clock oscillators are taken as an example. The voltage values of the plurality of different initial drive voltage signals are different.

[0071] According to an embodiment of the present invention, first, a target oscillator is determined among three clock oscillators. For example, the clock oscillator in the middle position is determined as the target oscillator. Then, different initial drive voltage signals are sequentially applied to a plurality of clock oscillators. When a certain initial drive voltage signal is applied, all three clock oscillators will vibrate under the action of this initial drive voltage signal. When the clock oscillator vibrates, it cuts the magnetic induction lines in the magnetic field applied by the permanent magnet, and thus each clock oscillator will generate a first current signal corresponding to this initial drive voltage signal.

[0072] According to an embodiment of the present invention, for each clock oscillator, a plurality of first current signals corresponding to different initial drive voltage signals of this clock oscillator are fitted, and then the oscillator parameters of this clock oscillator can be obtained. The oscillator parameters may refer to the resonant frequency and the spectral line width. Among them, the spectral line width is also the oscillator loss.

[0073] According to an embodiment of the present invention, after obtaining the oscillator parameters of each clock oscillator, a target drive voltage signal can be generated based on the above-mentioned oscillator parameters. Applying this target drive voltage signal to the previous target oscillator, a continuous and stable sine signal as shown in Figure 2 can be generated from the associated oscillators related to this target oscillator, that is, the target clock signal.

[0074] It should be noted that since there are slight differences even between different clock oscillators of the same model, for each combination (that is, a plurality of clock oscillators used to generate the target clock signal), the method of the present invention is required to calculate the target drive voltage signal.

[0075] According to an embodiment of the present invention, by respectively applying a plurality of different initial drive voltage signals to a plurality of clock oscillators, so that each clock oscillator generates different first current signals in response to each initial drive voltage signal, the oscillator parameters of this clock oscillator are calculated according to the plurality of first current signals of each clock oscillator, and thus the target drive voltage signal for the target clock signal is determined based on the oscillator parameters of the plurality of clock oscillators. The target drive voltage signal determined by the clock signal generation method of the present invention can make the clock system at the singularity of the non-Hermitian system, and thus a stable target clock signal can be continuously output, improving the generation accuracy and stability of the target clock signal.

[0076] According to an embodiment of the present invention, when initial drive voltage signals are respectively applied to a plurality of clock oscillators, reading the first current signal of each clock oscillator includes:

[0077] Respectively applying initial drive voltage signals to a plurality of clock oscillators to make the plurality of clock oscillators vibrate under the action of the magnetic field; for each clock oscillator, when the clock oscillator cuts the magnetic induction lines during vibration, reading the first current signal generated by the clock oscillator.

[0078] According to an embodiment of the present invention, the clock oscillator may be a mechanical oscillator with gold or other materials plated on its surface, and the mechanical oscillator may be a silicon-based resonator such as silicon oxide or silicon nitride.

[0079] According to an embodiment of the present invention, when an initial driving voltage signal is applied to the target oscillator, under the action of the magnetic field applied by the permanent magnet, each clock oscillator is driven to vibrate by the Ampere force. The vibrating clock oscillator will cut the magnetic induction line, thereby generating and reading a first current signal related to the amplitude.

[0080] According to an embodiment of the present invention, multiple first current signals are subjected to fitting processing to obtain the oscillator parameters of the clock oscillator, including: for each first current signal, reading the signal amplitude of the first current signal, where the signal amplitude represents the oscillator spectrum of the clock oscillator; performing Lorentz fitting on multiple oscillator spectra to obtain the oscillator parameters.

[0081] According to an embodiment of the present invention, the oscillator spectra of three clock oscillators can be obtained based on the amplitude of the read first current signal. For each clock oscillator, performing Lorentz line fitting on multiple oscillator spectra of the clock oscillator can obtain the oscillator parameters of the clock oscillator, such as the resonance frequency and oscillator loss (or spectral linewidth) , where and respectively represent the resonance frequency and oscillator loss of the i-th clock oscillator. When i = 1, it represents the associated oscillator; when i = 2, it represents the target oscillator; when i = 3, it represents the related oscillator.

[0082] According to an embodiment of the present invention, when the number of clock oscillators is three, the multiple clock oscillators are respectively an associated oscillator, a target oscillator, and a related oscillator.

[0083] According to an embodiment of the present invention, a target driving voltage signal is generated based on the oscillator parameters of multiple clock oscillators, including: generating a first resonance frequency according to the resonance frequency of the associated oscillator and the resonance frequency of the target oscillator; generating a second resonance frequency according to the resonance frequency of the target oscillator and the resonance frequency of the related oscillator; generating a target driving voltage signal according to the first resonance frequency and the second resonance frequency.

[0084] According to an embodiment of the present invention, according to the resonance frequency of the associated oscillator and the resonance frequency of the target oscillator , a first resonance frequency is generated. According to the resonance frequency of the target oscillator and the resonance frequency of the related oscillator, a second resonance frequency is generated. According to the first resonance frequency and the second resonance frequency , a target drive voltage signal is generated, and the target drive voltage signal is generated according to the first resonance frequency and the second resonance frequency .

[0085] Figure 3 Fig. shows a flowchart of generating a target drive voltage signal according to an embodiment of the present invention.

[0086] According to an embodiment of the present invention, the oscillator parameters further include an initial spectral linewidth.

[0087] According to an embodiment of the present invention, as Figure 3 shown, the target drive voltage signal is generated through operation S301 to operation S304:

[0088] In operation S301, when different initial voltage signals are applied to the target oscillator, according to a plurality of second current signals read from the associated oscillator, a first relational expression is determined, where the first relational expression characterizes the relationship between the coupling strength and the initial voltage signal, and the initial voltage signal includes an initial coupling signal having the first resonance frequency and a DC signal.

[0089] In operation S302, when different initial pump signals are applied to the target oscillator, according to a plurality of third current signals read from the relevant oscillator, a second relational expression is determined, where the second relational expression characterizes the relationship between the intermediate spectral linewidth corresponding to the target oscillator when the initial pump signal is applied and the initial spectral linewidths corresponding to the target oscillator and the relevant oscillator respectively when the initial drive voltage signal is applied, and the initial pump signal is generated according to a sum frequency signal having the second resonance frequency and a DC signal.

[0090] In operation S303, based on the second relational expression, a target pump signal is predicted, where the intermediate spectral linewidth is less than a preset value when the target pump signal is applied.

[0091] In operation S304, according to the first relational expression, the initial spectral linewidth of the associated oscillator, and a plurality of associated spectral linewidths, a voltage range of the target coupling signal is determined, so as to generate a target drive voltage signal according to the target coupling signal and the target pump signal, where each associated spectral linewidth corresponding to the relevant oscillator is less than a preset value.

[0092] According to an embodiment of the present invention, an initial coupling signal with a frequency of but different AC voltages (the voltage is 70 - 80 mV) is applied to the target oscillator , while applying a DC signal of a certain magnitude (e.g., 2 - 10V, preferably 5V), the target oscillator is coupled to the associated oscillator adjacent to it through electrostatic force, that is, the vibration signals of the two clock oscillators will affect each other. Determine the first relationship based on multiple second current signals read from the associated oscillator.

[0093] According to an embodiment of the present invention, after determining the first relationship, turn off the initial voltage signal, and then apply an AC voltage signal with a frequency of (i.e., the sum - frequency signal) and a DC signal of a certain magnitude (e.g., 2 - 10V, preferably 5V) as the initial pump signal together. The target oscillator is gain - coupled to the associated oscillator adjacent to it through electrostatic force. By selecting initial pump signals with different voltage values , determine the second relationship using multiple third current signals read from the associated oscillator.

[0094] According to an embodiment of the present invention, after determining the second relationship, predict the intermediate spectral linewidth less than a preset value (e.g., a negative value) for a target pump signal. At this time, the oscillator loss is negative loss.

[0095] According to an embodiment of the present invention, according to the first relationship and the initial spectral linewidth of the associated oscillator and multiple associated spectral linewidths (i.e., the multiple intermediate spectral linewidths when selecting multiple different initial pump signals above ), determine the voltage range of the target coupling signal through formula (1), for example, the voltage range is 50 - 300mV. Generate a target drive voltage signal based on the target coupling signal and the target pump signal within this voltage range.

[0096] (1)

[0097] Wherein, is the first coefficient, is the initial coupling signal in the initial voltage signal, is the initial spectral linewidth of the associated oscillator, i.e., the intermediate spectral linewidth related to the target oscillator when selecting multiple different initial pump signals above.

[0098] According to an embodiment of the present invention, determining the first relationship based on multiple second current signals read from the associated oscillator includes the following operations:

[0099] When different initial voltage signals are applied to the target oscillator, the target oscillator causes the associated oscillator to vibrate through electrostatic force under the drive of different initial voltage signals.

[0100] For each initial voltage signal, an initial spectrum is generated based on the second current signal read from the associated oscillator to determine the first splitting width of the spectral peak on the initial spectrum, where the first splitting width characterizes the first coupling strength.

[0101] Fitting processing is performed on multiple initial voltage signals and the first coupling strength corresponding to each initial voltage signal to obtain a first relational expression.

[0102] According to an embodiment of the present invention, after applying a certain initial voltage signal to the target oscillator, the target oscillator makes the associated oscillator vibrate through electrostatic force under the drive of different initial voltage signals, and the second current signal of the associated oscillator is read, so as to obtain the initial spectrum corresponding to the second current signal. Compared with the oscillator spectrum when the initial drive voltage signal is applied, the spectrum of the associated oscillator on the initial spectrum will split from a single peak into a double peak, and the splitting width (i.e., the first splitting width) is the first coupling strength , by measuring the initial coupling signals of different magnitudes The initial voltage signals formed are used for fitting to obtain the magnitude of the first coefficient so as to obtain the first relational expression as shown in formula (2).

[0103] (2)

[0104] wherein, is the first coupling strength, is the first coefficient determined through fitting, is the initial coupling signal in the initial voltage signal.

[0105] According to an embodiment of the present invention, a second relational expression is determined according to multiple third current signals read from the relevant oscillator, including:

[0106] When different initial pump signals are applied to the target oscillator, the target oscillator makes the relevant oscillator vibrate through electrostatic force under the drive of different initial pump signals.

[0107] For each initial pump signal, an intermediate spectrum is generated based on the third current signal read from the relevant oscillator to determine the second splitting width of the spectral peak on the intermediate spectrum, where the second splitting width characterizes the second coupling strength.

[0108] Fitting processing is performed on multiple initial pump signals and the second coupling strength corresponding to each initial pump signal to obtain a transition relational expression.

[0109] A second relational expression is generated according to the transition relational expression, the intermediate spectrum linewidth, the initial spectrum linewidth corresponding to the relevant oscillator, and the initial spectrum linewidth corresponding to the target oscillator.

[0110] According to an embodiment of the present invention, an initial pump signal is applied to the target oscillator. When the target oscillator is driven by the initial pump signal through electrostatic force, a gain coupling is generated between the target oscillator and the related oscillator adjacent thereto. At this time, compared with the oscillator spectrum when the initial driving voltage signal is applied, the linewidth of the target oscillator (i.e., the intermediate spectrum linewidth) becomes narrower to . The width of the narrowed linewidth depends on the second coupling strength

[0111] According to an embodiment of the present invention, by selecting initial pump signals with different voltage magnitudes and combining with an unknown second coefficient , a transition relationship as shown in formula (3) can be obtained:

[0112] (3)

[0113] Wherein, is the second coupling strength, is the initial pump signal, is the unknown second coefficient.

[0114] According to an embodiment of the present invention, based on the transition relationship, the intermediate spectrum linewidth , the initial spectrum linewidth corresponding to the related oscillator and the initial spectrum linewidth corresponding to the target oscillator , a second relationship as shown in formula (4) is generated:

[0115] (4)

[0116] Wherein, is the intermediate spectrum linewidth corresponding to the target oscillator, is the initial spectrum linewidth corresponding to the target oscillator, is the initial spectrum linewidth corresponding to the related oscillator.

[0117] According to an embodiment of the present invention, according to different initial pump signals , the corresponding intermediate spectrum linewidth is read, and the second coupling strength is deduced based on formula (4). For each deduced second coupling strength and the initial pump signal , fitting is performed to determine the specific value of the unknown second coefficient .

[0118] According to an embodiment of the present invention, the target pump signal is predicted based on the second relationship. Among them, when the above target pump signal is applied, the above intermediate spectrum linewidth Less than a preset value (such as a negative value, e.g., 0), at this time the oscillator loss is negative loss. Select the initial pump signal with the maximum voltage value from the multiple different initial pump signals selected above as the target pump signal.

[0119] According to an embodiment of the present invention, generating a target drive voltage signal according to the target coupling signal and the target pump signal includes: generating a plurality of first coupling signals with different voltages according to the voltage range of the target coupling signal; for each first coupling signal, generating a first drive voltage signal according to the first coupling signal and the target pump signal, wherein the frequency of the first drive voltage signal is generated according to the first resonance frequency and the second resonance frequency; applying the first drive voltage signal to the target oscillator, and reading the initial clock signal on the associated oscillator; when the initial clock signal meets the preset conditions, determining the first drive voltage signal as the target drive voltage signal.

[0120] According to an embodiment of the present invention, according to the voltage range of the target coupling signal (for example, the voltage range is 50~300 mV), a plurality of first coupling signals with different voltages are generated. For each first coupling signal, it is combined with the target pump signal (for example, 200 mV) to generate a first drive voltage signal, and the first drive voltage signal is applied to the target oscillator, so that the associated oscillator is coupled with the target oscillator with "negative loss" at this time. At this time, without additional driving, the target oscillator will be driven by thermal noise. However, because the linewidth of the clock system is large and the thermal noise spectral peak is not high, it will be submerged by environmental noise and electronics noise. By adjusting the voltage magnitude of the target coupling signal to control the coupling strength it is possible to make the clock system gradually approach the singularity of the non-Hermitian system. At this time, the linewidth of the clock system will be significantly narrowed, and the output initial clock signal will change from noise to a stable sinusoidal signal that oscillates continuously (i.e., meets the preset conditions). At this time, the first drive voltage signal can be determined as the target drive voltage signal, and the target drive voltage signal can be expressed by formula (5):

[0121] (5)

[0122] where t is time, is the DC signal recorded above, is the target coupling signal, is the target pump signal.

[0123] According to an embodiment of the present invention, continuously applying the determined target drive voltage signal to the target oscillator, a stable target clock signal that oscillates continuously can be read from the associated oscillator.

[0124] Figure 4 The schematic diagram of the composition of the clock system according to an embodiment of the present invention is shown.

[0125] See Figure 4 , the clock of the embodiment of the present invention includes a plurality of clock oscillators, wherein the plurality of clock oscillators are electrically connected to each other, and one of the plurality of clock oscillators is a target oscillator 100.

[0126] When a target drive voltage signal is applied to the target oscillator 100, a stable target clock signal generated by the associated oscillator 200 associated with the target oscillator 100 is read. The target drive voltage signal is generated according to the oscillator parameters of the plurality of clock oscillators, and the oscillator parameter of each clock oscillator is obtained by fitting a plurality of first current signals related to the clock oscillator. The plurality of first current signals are read from the clock oscillator when different initial drive voltage signals are applied to the target oscillator 100.

[0127] According to an embodiment of the present invention, the target oscillator 100 is electrically connected to the relevant oscillator and the associated oscillator 200 respectively through a resistor 110. The resistance value of the resistor 110 can be 1 MΩ.

[0128] According to an embodiment of the present invention, by applying a plurality of different initial drive voltage signals to the plurality of clock oscillators respectively, so that each clock oscillator generates different first current signals in response to each initial drive voltage signal, the oscillator parameters of each clock oscillator are calculated according to the plurality of first current signals of each clock oscillator, and thus the target drive voltage signal for the target clock signal is determined based on the oscillator parameters of the plurality of clock oscillators. The target drive voltage signal determined by the clock signal generation method of the present invention can make the clock system at the singularity of the non-Hermitian system, thereby continuously outputting a stable target clock signal and improving the generation accuracy and stability of the target clock signal.

[0129] As Figure 4 shown, the clock system includes a clock, a voltage input device 300, and a clock signal reading device 400.

[0130] The voltage input device 300 is configured to input an initial drive voltage signal or a target drive voltage signal to the target oscillator 100 in the clock, so that the clock generates a first current signal or a target clock signal.

[0131] The clock signal reading device 400 is configured to read the first current signal from each clock oscillator in the clock, or read the target clock signal from the associated oscillator 200 associated with the target oscillator 100.

[0132] According to an embodiment of the present invention, the voltage input device 300 may include an arbitrary waveform generator 310, a DC voltage source 320, and a combiner 330 connected to the arbitrary waveform generator 310 and the DC voltage source 320. The combiner 330 applies a voltage signal to the target oscillator 100.

[0133] According to an embodiment of the present invention, the clock signal reading device 400 may be an oscilloscope, a lock-in amplifier, or the like.

[0134] According to an embodiment of the present invention, by respectively applying a plurality of different initial drive voltage signals to a plurality of clock oscillators, so that each clock oscillator generates different first current signals in response to each initial drive voltage signal, the oscillator parameters of the clock oscillator are calculated according to the plurality of first current signals of each clock oscillator, and thus the target drive voltage signal for the target clock signal is determined based on the oscillator parameters of the plurality of clock oscillators. The target drive voltage signal determined by the clock signal generation method of the embodiment of the present invention can make the clock system at the singularity of the non-Hermitian system, and thus a stable target clock signal can be continuously output, improving the generation accuracy and stability of the target clock signal.

[0135] The embodiments of the present invention have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Although the embodiments are described separately above, this does not mean that the measures in each embodiment cannot be used advantageously in combination. The scope of the present invention is defined by the embodiments and their equivalents. Without departing from the scope of the present invention, those skilled in the art can make various substitutions and modifications, and these substitutions and modifications should fall within the scope of the present invention.

Claims

1. A clock signal generation method, characterized in that: include: Determining a target oscillator among a plurality of clock oscillators adjacent to each other, wherein the plurality of clock oscillators are electrically connected to each other; For any one of a plurality of different initial driving voltage signals, when the initial driving voltage signal is applied to a plurality of clock oscillators respectively, a first current signal of each of the clock oscillators is read; For each of the clock oscillators, a fitting process is performed on a plurality of the first current signals to obtain an oscillator parameter of the clock oscillator; generating a target driving voltage signal according to the oscillator parameters of the plurality of clock oscillators; In a case where the target driving voltage signal is applied to the target oscillator, a target clock signal generated by an associated oscillator related to the target oscillator is read.

2. The method according to claim 1, characterized in that: When the initial driving voltage signal is applied to the plurality of clock oscillators respectively, reading the first current signal of each of the clock oscillators comprises: Applying the initial driving voltage signal to the plurality of clock oscillators respectively, so that the plurality of clock oscillators vibrate under the action of the magnetic field; For each of the clock oscillators, when the clock oscillator cuts the magnetic flux lines during vibration, a first current signal generated by the clock oscillator is read.

3. The method according to claim 1, characterized in that Performing fitting processing on the plurality of first current signals to obtain oscillator parameters of the clock oscillator includes: For each of the first current signals, reading a signal amplitude of the first current signal, wherein the signal amplitude represents an oscillator spectrum of the clock oscillator; Lorentz fitting is performed on a plurality of the oscillator spectra to obtain the oscillator parameters.

4. The method according to claim 1, characterized in that: The oscillator parameters include resonance frequency; Wherein, when the number of the clock oscillators is three, the multiple clock oscillators are respectively the associated oscillator, the target oscillator and the related oscillator; The step of generating a target driving voltage signal according to the oscillator parameters of the plurality of clock oscillators comprises: generating a first resonant frequency according to the resonant frequency of the associated vibrator and the resonant frequency of the target vibrator; generating a second resonant frequency according to the resonant frequency of the target vibrator and the resonant frequency of the related vibrator; The target driving voltage signal is generated according to the first resonant frequency and the second resonant frequency.

5. The method according to claim 4, characterized in that The oscillator parameters also include initial spectrum line width; Wherein, the target driving voltage signal is generated in the following manner: In the case where different initial voltage signals are applied to the target vibrator, a first relational expression is determined according to a plurality of second current signals read from the associated vibrator, wherein the first relational expression represents a relationship between coupling strength and the initial voltage signal, wherein the initial voltage signal includes an initial coupling signal having the first resonant frequency and a DC signal; In the case where different initial pump signals are applied to the target oscillator, a second relational expression is determined according to a plurality of third current signals read from the related oscillators, wherein the second relational expression represents a relationship between an intermediate spectrum line width corresponding to the target oscillator when the initial pump signal is applied and initial spectrum line widths corresponding to the target oscillator and the related oscillator respectively when the initial driving voltage signal is applied, and the initial pump signal is generated according to a sum frequency signal having a second resonant frequency and the DC signal; predicting a target pump signal based on the second relational expression, wherein the intermediate spectrum line width is smaller than a preset value when the target pump signal is applied; The voltage range of the target coupling signal is determined according to the first relationship, the initial spectral linewidth of the associated oscillator and the multiple associated spectral linewidths, so as to generate the target driving voltage signal according to the target coupling signal and the target pump signal, wherein each of the associated spectral linewidths corresponding to the relevant oscillator is smaller than the preset value.

6. The method according to claim 5, characterized in that Determining a first relational expression according to a plurality of second current signals read from the associated vibrator includes: When different initial voltage signals are applied to the target vibrator, the target vibrator vibrates the associated vibrator through electrostatic force when driven by the different initial voltage signals; For each of the initial voltage signals, generating an initial spectrum according to the second current signal read from the associated oscillator, so as to determine a first splitting width of a spectrum peak on the initial spectrum, wherein the first splitting width represents a first coupling strength; Fitting processing is performed on the plurality of initial voltage signals and the first coupling strength corresponding to each of the initial voltage signals to obtain the first relationship.

7. The method according to claim 5, characterized in that Determining a second relational expression according to a plurality of third current signals read from the relevant vibrator includes: When different initial pump signals are applied to the target oscillator, the target oscillator is driven by the different initial pump signals to vibrate the related oscillator through electrostatic force; For each of the initial pump signals, an intermediate spectrum is generated according to the third current signal read from the relevant oscillator to determine a second splitting width of a spectrum peak on the intermediate spectrum, wherein the second splitting width represents a second coupling strength; Performing fitting processing on the plurality of initial pump signals and the second coupling strength corresponding to each of the initial pump signals to obtain a transition relationship; The second relational expression is generated according to the transitional relational expression, the intermediate spectrum linewidth, the initial spectrum linewidth corresponding to the relevant oscillator, and the initial spectrum linewidth corresponding to the target oscillator.

8. The method according to claim 5, characterized in that Generating the target driving voltage signal according to the target coupling signal and the target pump signal includes: generating a plurality of first coupling signals with different voltage amplitudes according to the voltage range of the target coupling signal; For each of the first coupling signals, generating a first driving voltage signal according to the first coupling signal and the target pump signal, wherein the frequency of the first driving voltage signal is generated according to the first resonant frequency and the second resonant frequency; Applying the first driving voltage signal to the target oscillator and reading the initial clock signal on the associated oscillator; When the initial clock signal meets a preset condition, the first driving voltage signal is determined as the target driving voltage signal.

9. A clock, characterized in that: include: A plurality of clock oscillators, wherein the plurality of clock oscillators are electrically connected to each other and the plurality of clock oscillators include a target oscillator; Wherein, when a target driving voltage signal is applied to the target oscillator, a stable target clock signal of continuous oscillation generated by an associated oscillator related to the target oscillator is read, wherein the target driving voltage signal is generated based on oscillator parameters of a plurality of clock oscillators, and the oscillator parameters of each clock oscillator are obtained by fitting a plurality of first current signals related to the clock oscillator, and the plurality of first current signals are read from different clock oscillators when different initial driving voltage signals are applied to the plurality of clock oscillators respectively.

10. A clock system, characterized in that: include: The clock as claimed in claim 9; A voltage input device configured to input an initial driving voltage signal or a target driving voltage signal to a target oscillator in the clock so that the clock generates a first current signal or a target clock signal; The clock signal reading device is configured to read the first current signal from each clock oscillator in the clock, or read the target clock signal from an associated oscillator related to the target oscillator.

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