CN113837389B - Ion trap driving device - Google Patents
Ion trap driving device Download PDFInfo
- Publication number
- CN113837389B CN113837389B CN202111132146.8A CN202111132146A CN113837389B CN 113837389 B CN113837389 B CN 113837389B CN 202111132146 A CN202111132146 A CN 202111132146A CN 113837389 B CN113837389 B CN 113837389B
- Authority
- CN
- China
- Prior art keywords
- signal
- radio frequency
- frequency
- ion trap
- signals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005040 ion trap Methods 0.000 title claims abstract description 33
- 230000008878 coupling Effects 0.000 claims abstract description 5
- 238000010168 coupling process Methods 0.000 claims abstract description 5
- 238000005859 coupling reaction Methods 0.000 claims abstract description 5
- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06N—COMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
- G06N10/00—Quantum computing, i.e. information processing based on quantum-mechanical phenomena
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
Abstract
The invention discloses an ion trap driving device, which relates to the field of quantum computation and comprises a signal generator, an integrator, a frequency selector, a power amplifier, a resonator, a collector, an analog-to-digital converter, an offset monitor and a regulator, wherein the signal generator is used for preparing PWM pulse signals, the integrator is used for integrating the PWM pulse signals to obtain triangular wave signals, the frequency selector is used for selecting signals with specific frequencies from the triangular wave signals as radio frequency signals, the power amplifier is used for increasing the power of the radio frequency signals with the specific frequencies, the resonator is used for coupling the radio frequency signals with the specific frequencies into an ion trap, the offset monitor is used for calculating the frequency offset of the radio frequency signals in real time according to digital signals, and the regulator is used for regulating parameters of the signal generator in real time according to the frequency offset of the radio frequency signals, so that the frequency drift amplitude of the radio frequency signals is reduced, and the stability of the radio frequency signals is improved.
Description
Technical Field
The invention relates to the technical field of quantum computing, in particular to an ion trap driving device.
Background
In the field of quantum computing, it is desirable for ion trap drives to produce stable radio frequency signals at a frequency of 48 MHz. The ion trap driving device is generally composed of components such as a radio frequency oscillator, a power amplifier, a resonant transformer and the like. The ion trap injection driving device is easy to be interfered by the fluctuation of the ambient temperature, so that the output radio frequency signal is unstable, and frequency offset is easy to generate, thereby reducing the time of ion trapping. Because the rf oscillator that generates the rf signal of the ion trap is susceptible to temperature fluctuations, when the temperature changes, some parameters in the rf oscillator may generate small-amplitude fluctuations, and the generated rf signal may also generate small-amplitude frequency drift or "jitter", and this frequency drift may affect the trapping of the ion trap on the ions, so it is necessary to design a solution that can reduce the frequency drift of the rf signal.
The current ion trap driving device mainly adopts a radio frequency oscillator to generate a radio frequency signal source, the radio frequency oscillator is easy to generate heat, and part of parameters in the radio frequency oscillator are greatly influenced by the ambient temperature. When the ambient temperature changes, the internal parameters of the ion trap change, so that the frequency of the output radio frequency signal shifts or 'shakes', and the digital PID control circuit is difficult to eliminate the shift or the 'shake' of the frequency of the radio frequency signal, thereby affecting the capture of ions by the ion trap.
Disclosure of Invention
Aiming at the defects existing in the prior art, the embodiment of the invention provides an ion trap driving device, which aims to solve the defects existing in the prior art.
In order to achieve the above object, an ion trap driving device according to an embodiment of the present invention includes:
and the signal generator is used for preparing the PWM pulse signal.
And the integrator is used for integrating the PWM pulse signal to obtain a triangular wave signal.
And the frequency selector is used for selecting a signal with a specific frequency from the triangular wave signals as a radio frequency signal.
And the power amplifier is used for increasing the power of the radio frequency signal with the specific frequency.
And the resonator is used for coupling the radio-frequency signal with the specific frequency into the ion trap.
And the collector is used for collecting the radio frequency signals output by the resonator in real time according to the set proportion.
And the analog-to-digital converter is used for converting the radio frequency signal into a corresponding digital signal.
And the offset monitor is used for calculating the frequency offset of the radio frequency signal in real time according to the digital signal.
And the adjuster is used for adjusting the parameters of the signal generator in real time according to the frequency offset of the radio frequency signal.
As a preferred embodiment of the present invention, the signal generator is a PWM pulse signal generator.
As a preferred embodiment of the present invention, the frequency selector is a band-pass filter.
As a preferred embodiment of the present invention, the offset monitor is specifically configured to perform fourier transform on the digital signal, and calculate, in real time, a frequency offset of the radio frequency signal according to a fourier transform result.
As a preferred embodiment of the present invention, the adjuster is specifically configured to determine in real time whether the frequency offset of the radio frequency signal is a positive value or a negative value, and if the frequency offset is a positive value, adjust the duty cycle of the PWM pulse signal output by the signal generator in real time by using a first duty cycle calculation model.
In a preferred embodiment of the present invention, the adjuster is specifically configured to adjust the duty ratio of the PWM pulse signal output by the signal generator by using a second duty ratio calculation model if the frequency offset of the radio frequency signal is determined to be a positive value or a negative value.
As a preferred embodiment of the present invention, the first duty cycle calculation model is:
wherein, the liquid crystal display device comprises a liquid crystal display device,
representing the frequency offset, +.>
P represents the duty cycle of the PWM pulse signal.
As a preferred embodiment of the present invention, the second duty cycle calculation model is:
the ion trap driving device provided by the embodiment of the invention has the following beneficial effects:
(1) The PWM pulse signal generator with small self heating value is adopted, so that the influence of the ambient temperature is small, and the frequency drift amplitude of the radio frequency signal is reduced;
(2) Aiming at different conditions of frequency drift of the radio frequency signals, different duty ratio calculation models are adopted to adjust the duty ratio of the PWM pulse signals, so that the frequency drift amplitude of the radio frequency signals is further reduced, and the stability of the radio frequency signals is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will briefly introduce the drawings that are required to be used in the embodiments or the prior art descriptions, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an ion trap driving device according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of an integrator.
Fig. 3 is a schematic diagram of frequency offset of a radio frequency signal.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, an ion trap driving apparatus provided by an embodiment of the present invention includes a signal generator, an integrator, a frequency selector, a power amplifier, a resonator, a collector, an analog-to-digital converter, an offset monitor, and a regulator, wherein:
the signal generator is used for preparing PWM pulse signals.
As an alternative embodiment of the present invention, the signal generator is a PWM pulse signal generator. The PWM pulse signal is a pulse signal with a pulse width that is adjustable, that is, a pulse signal with a variable duty ratio.
The integrator is used for integrating the PWM pulse signal to obtain a triangular wave signal.
As a specific embodiment of the present invention, the circuit of the integrator is shown in fig. 2.
The integrator is a component, the output signal of which is the integral of the input signal with respect to time, and the integrator can be regarded as a continuous version of the counter, and the input signal can be accumulated and then output.
The frequency selector is used for selecting a signal with a specific frequency from the triangular wave signals as a radio frequency signal.
As an alternative embodiment of the present invention, the frequency selector is a band-pass filter for selecting a triangular wave signal having a frequency of 48MHz from triangular wave signals having a plurality of frequencies and filtering out triangular wave signals having other frequencies.
The power amplifier is used for increasing the power of the radio frequency signal with a specific frequency.
The resonator is for coupling the radio frequency signal of the specific frequency into the ion trap.
The collector is used for collecting the radio frequency signals output by the resonator in real time according to the set proportion.
As an alternative embodiment of the present invention, the set ratio is 1/100, that is, when the power of the rf signal output by the resonator is 100mw, the power of the rf signal collected by the collector is 1mw, and the power of the rf signal coupled into the ion trap is 99mw.
The analog-to-digital converter is used for converting the radio frequency signal into a corresponding digital signal.
The offset monitor is used for calculating the frequency offset of the radio frequency signal in real time according to the digital signal.
As an optional embodiment of the present invention, the offset monitor is specifically configured to perform fourier transform on the digital signal, and calculate, in real time, a frequency offset of the radio frequency signal according to a result of the fourier transform. The specific calculation process is as follows:
the frequency of the radio frequency signal in the channel, i.e. the frequency of the radio frequency signal in the channel, can be calculated by fourier transformation of the sampled signal. The sampled signal is represented by fourier transform, and the sampled signal is represented by a signal in the frequency domain. The frequency corresponding to the maximum value of the pulse signal is the frequency of the radio frequency signal in the channel.
The adjuster is used for adjusting parameters of the signal generator in real time according to the frequency offset of the radio frequency signal.
As an alternative embodiment of the present invention, as shown in fig. 3, the adjuster is specifically configured to determine in real time whether the frequency offset of the radio frequency signal is positive or negative, and if the frequency offset is positive, adjust the duty cycle of the PWM pulse signal output by the signal generator in real time by using the first duty cycle calculation model, and if the frequency offset is negative, adjust the duty cycle of the PWM pulse signal output by the signal generator in real time by using the second duty cycle calculation model.
Wherein, the definition of duty cycle is:
wherein->
Representing the duration of a high level in one cycle, +.>
Representing the duration of the low level in one cycle. The frequency of the rf signal is the number of times the rf signal goes from high to low and back to high per second. When the duty ratio of the PWM pulse signal output by the signal generator is 50%, the frequency of the radio frequency signal output by the frequency selector reaches the minimum value. The larger the absolute value of the difference between the duty ratio of the PWM pulse signal output by the signal generator and 50%, the larger the frequency of the radio frequency signal output by the frequency selector, so the frequency of the radio frequency signal output by the frequency selector can be adjusted by adjusting the duty ratio of the PWM pulse signal output by the signal generator to stabilize the frequency of the radio frequency signal.
As an alternative embodiment of the present invention, when the ion trap drive is required to generate a stable rf signal at 48MHz, the frequency offset of the 48MHz rf signal in the rf channel may be either positive or negative. At this time, the regulator adjusts the duty ratio of the PWM pulse signal output from the PWM pulse signal generator by using the duty ratio calculation model to correct the frequency of the radio frequency signal.
If the frequency offset of the 48MHz radio frequency signal is positive, the duty cycle calculation model employed by the regulator is expressed as follows:
if the frequency offset of the 48MHz radio frequency signal is negative, the duty cycle calculation model employed by the regulator is expressed as follows:
in the formula (1) and (2),
representing the frequency offset, +.>
P represents the duty cycle of the PWM pulse signal.
The ion trap radio frequency device comprises a signal generator, an integrator, a frequency selector, a power amplifier, a resonator, an acquisition device, an analog-to-digital converter, an offset monitor and a regulator, wherein the signal generator is used for preparing PWM pulse signals, the integrator is used for integrating the PWM pulse signals to obtain triangular wave signals, the frequency selector is used for selecting signals with specific frequencies from the triangular wave signals to serve as radio frequency signals, the power amplifier is used for increasing the power of the radio frequency signals with specific frequencies, the resonator is used for coupling the radio frequency signals with specific frequencies into the ion trap, the acquisition device is used for acquiring the radio frequency signals output by the resonator in real time according to a set proportion, the analog-to-digital converter is used for converting the radio frequency signals into corresponding digital signals, the offset monitor is used for calculating the frequency offset of the radio frequency signals in real time according to the digital signals, the regulator is used for adjusting parameters of the signal generator in real time according to the frequency offset of the radio frequency signals, the frequency drift amplitude of the radio frequency signals is reduced, and the stability of the radio frequency signals is improved.
It will be appreciated that the relevant features of the apparatus described above may be referred to with respect to each other. The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.
It should be noted that, the above embodiments are not intended to limit the present invention in any way, and all the technical solutions obtained by adopting equivalent substitution or equivalent transformation fall within the protection scope of the present invention.
Claims (8)
1. An ion trap drive circuit, comprising:
a signal generator for preparing a PWM pulse signal;
the integrator is used for integrating the PWM pulse signal to obtain a triangular wave signal;
the frequency selector is used for selecting a signal with a specific frequency from the triangular wave signals as a radio frequency signal;
a power amplifier for increasing the power of the radio frequency signal of the specific frequency;
a resonator for coupling the radio frequency signal of the specific frequency into the ion trap;
the collector is used for collecting the radio frequency signals output by the resonator in real time according to the set proportion;
the analog-to-digital converter is used for converting the radio frequency signal into a corresponding digital signal;
the offset monitor is used for calculating the frequency offset of the radio frequency signal in real time according to the digital signal;
and the adjuster is used for adjusting the parameters of the signal generator in real time according to the frequency offset of the radio frequency signal.
2. The ion trap drive circuit of claim 1, wherein:
the signal generator is a PWM pulse signal generator.
3. The ion trap drive circuit of claim 1, wherein:
the frequency selector is a bandpass filter.
4. An ion trap drive circuit according to claim 1 or claim 2, wherein:
the offset monitor is specifically configured to perform fourier transform on the digital signal, and calculate, in real time, a frequency offset of the radio frequency signal according to a fourier transform result.
5. The ion trap driving circuit of claim 4, wherein:
the adjuster is specifically configured to determine whether the frequency offset of the radio frequency signal is a positive value or a negative value in real time, and if the frequency offset is a positive value, adjust the duty ratio of the PWM pulse signal output by the signal generator in real time by using the first duty ratio calculation model.
6. The ion trap drive circuit of claim 5, wherein:
the adjuster is specifically configured to adjust the duty ratio of the PWM pulse signal output by the signal generator by using the second duty ratio calculation model if the frequency offset of the radio frequency signal is determined to be a positive value or a negative value.
7. The ion trap drive circuit of claim 5, wherein:
the first duty ratio calculation model is as follows:
wherein, the liquid crystal display device comprises a liquid crystal display device,
representing the frequency offset, +.>
P represents the duty cycle of the PWM pulse signal.
8. The ion trap drive circuit of claim 6, wherein:
the second duty ratio calculation model is as follows:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111132146.8A CN113837389B (en) | 2021-09-27 | 2021-09-27 | Ion trap driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111132146.8A CN113837389B (en) | 2021-09-27 | 2021-09-27 | Ion trap driving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113837389A CN113837389A (en) | 2021-12-24 |
| CN113837389B true CN113837389B (en) | 2023-07-11 |
Family
ID=78970508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111132146.8A Active CN113837389B (en) | 2021-09-27 | 2021-09-27 | Ion trap driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113837389B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5451947A (en) * | 1993-02-26 | 1995-09-19 | Schlumberger Industries S. A. | Modulated dither signal |
| CN101840836A (en) * | 2010-04-29 | 2010-09-22 | 中国计量科学研究院 | Radio frequency power supply for mass spectrometer |
| CN102508183A (en) * | 2011-11-11 | 2012-06-20 | 辽宁开普医疗系统有限公司 | Digital variable frequency PWM (Pulse Width Modulation) gradient amplifier with adaptively-controlled load |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE60029097T2 (en) * | 2000-08-04 | 2007-06-14 | Stmicroelectronics S.R.L., Agrate Brianza | Pulse Code Modulation / Pulse Width Modulation Converter with Pulse Width Modulation Power Amplifier |
| JP4506285B2 (en) * | 2004-05-28 | 2010-07-21 | 株式会社島津製作所 | Ion trap apparatus and method for adjusting the apparatus |
| US7973277B2 (en) * | 2008-05-27 | 2011-07-05 | 1St Detect Corporation | Driving a mass spectrometer ion trap or mass filter |
| US7825726B2 (en) * | 2008-10-30 | 2010-11-02 | Freescale Semiconductor, Inc. | Digital pulse width modulation for half bridge amplifiers |
| US11630138B2 (en) * | 2019-04-15 | 2023-04-18 | The Regents Of The University Of California | High resolution spectrum monitoring |
-
2021
- 2021-09-27 CN CN202111132146.8A patent/CN113837389B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5451947A (en) * | 1993-02-26 | 1995-09-19 | Schlumberger Industries S. A. | Modulated dither signal |
| CN101840836A (en) * | 2010-04-29 | 2010-09-22 | 中国计量科学研究院 | Radio frequency power supply for mass spectrometer |
| CN102508183A (en) * | 2011-11-11 | 2012-06-20 | 辽宁开普医疗系统有限公司 | Digital variable frequency PWM (Pulse Width Modulation) gradient amplifier with adaptively-controlled load |
Non-Patent Citations (1)
| Title |
|---|
| 离子阱射频源谐振回路参数自动调节研究;罗宇;舒帅;孙奉娄;;电子技术(第07期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113837389A (en) | 2021-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105224811B (en) | A kind of PMU dynamic data processing methods based on feedback iteration formula frequency-tracking | |
| CN107782972B (en) | Power grid impedance measurement method based on variable PWM carrier frequency | |
| Blackwood et al. | Continuous phase estimation for phase-locked neural stimulation using an autoregressive model for signal prediction | |
| WO2021047447A1 (en) | Method for calculating oscillation damping ratio of power grid | |
| CN113837389B (en) | Ion trap driving device | |
| CN109742795A (en) | Single-phase grid-connected control method under virtual coordinate system based on SOGI | |
| CN109725200A (en) | A kind of adaptive frequency analysis system and its analysis method | |
| CN103647550A (en) | Phase-locked loop method for dynamic voltage reactive compensation | |
| Sumathi et al. | Phase locking scheme based on look-up-table-assisted sliding discrete Fourier transform for low-frequency power and acoustic signals | |
| Kitzig et al. | Improvement of mains frequency estimation robustness towards ripple control signals | |
| CN102789192A (en) | Feedback control system and frequency response measuring device thereof | |
| CN104510471A (en) | Signal processing method, device and magnetic resonance system | |
| US11143167B2 (en) | Estimating a characteristic of a wind turbine electrical signal | |
| CN115051364A (en) | Negative band-pass filter and hysteresis correction feedback type active damping system and method | |
| CN116165424A (en) | Multi-zero-crossing metering method and system for voltage and current | |
| Zölzer et al. | PLL-based pitch detection and tracking for audio signals | |
| CN110412522B (en) | NLFM waveform design method | |
| CN110880784B (en) | Grid-connected inverter current frequency self-adaptive repetitive control method | |
| CN112557750B (en) | Method and system for measuring signal frequency of secondary circuit of mutual inductor of metering device | |
| CN110098799A (en) | One kind is equivalent to restart frequency modulation real random number generator and true random number method for generation | |
| CN109581376A (en) | A kind of VCO frequency sweep non-linear correction method for safety check imaging | |
| CN113804936B (en) | Triangular wave signal parameter measurement method | |
| CN113644836B (en) | Robust control method suitable for LCL type grid-connected inverter | |
| CN113783552B (en) | Triangular wave signal generating system | |
| Føyen et al. | Single-phase synchronisation with Hilbert transformers: a linear and frequency independent orthogonal system generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Liuping Inventor after: Wan Xiangkui Inventor after: Luo Le Inventor after: Han Zhuo Inventor after: Li Wuyi Inventor before: Chen Liuping Inventor before: Wan Xiangkui Inventor before: Han Zhuo Inventor before: Li Wuyi |
|
| CB03 | Change of inventor or designer information | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231011 Address after: No. 049, 3rd Floor, Building A4, Phase I, Zhong'an Chuanggu Science and Technology Park, No. 900 Wangjiang West Road, High tech Zone, Hefei City, Anhui Province, 230031 Patentee after: Guokaike Quantum Technology (Anhui) Co.,Ltd. Patentee after: Guokaike quantum technology (Beijing) Co.,Ltd. Address before: 100193 room 108, 1st floor, building 5, East District, yard 10, xibeiwangdong Road, Haidian District, Beijing Patentee before: Guokaike quantum technology (Beijing) Co.,Ltd. |
|
| TR01 | Transfer of patent right |