Ion trap radio frequency drive device

Abstract

The present application discloses an ion trap radio frequency driving device, comprising: a sampling module, used to output a high-voltage signal of the ion trap radio frequency driving device, and to sample the high-voltage signal to obtain a sampling signal; a rectifying and filtering module, used to rectify and filter the sampling signal to obtain a DC voltage signal; a voltage source, used to provide a standard voltage reference signal; a proportional-integral controller, used to compare the DC voltage signal with the standard voltage reference signal to obtain a feedback signal; a radio frequency signal source, used to provide a local oscillator signal; a mixer, used to adjust the radio frequency output signal according to the local oscillator signal and the feedback signal to obtain a radio frequency stable signal; a power amplifier, used to amplify the radio frequency stable signal, and output a high-voltage signal through the sampling circuit, thereby ensuring a larger radio frequency voltage gain and a higher signal-to-noise ratio.

Description

Technical Field

[0001] The present application relates to the field of quantum computing technology, and in particular to an ion trap radio frequency driving device. Background Art

[0002] When the ion trap is working, the frequency of the RF voltage applied to the electrodes is usually 10~100MHz, and the voltage amplitude is in the order of 100~1000V. Generally, a spiral resonant cavity is used as a voltage amplifier for RF signals. At the same time, it is also an excellent passive bandpass filter, which can effectively suppress the high-order harmonic components of RF signals.

[0003] In the process of implementing the prior art, the inventor discovered that:

[0004] When the spiral resonant cavity drives the ion trap electrode to generate a high voltage signal for ion trapping, the ion trap is particularly sensitive to the fluctuation of the driving circuit. The RF potential determines the harmonic oscillation frequency of the trapped ions. A stable RF potential is conducive to the ion trap achieving a better trapping effect. In the current ion trapping system, the influence of factors such as amplifier gain fluctuation, resonant cavity vibration and system temperature drift on the stability of the resonant cavity RF voltage is an urgent problem to be solved.

[0005] Therefore, it is necessary to provide a technical solution in which a sampling circuit and a feedback circuit do not affect the Q value of the resonator as much as possible, while being able to provide a stable radio frequency voltage for the ion trap. Summary of the invention

[0006] The embodiment of the present application provides a sampling circuit and a feedback circuit that do not affect the Q value of the resonator as much as possible and a related technical solution that can provide a stable RF voltage for the ion trap, so as to solve the technical problem that factors such as amplifier gain fluctuation, resonant cavity vibration and system temperature drift affect the stability of the resonant cavity RF voltage in the current ion trapping system.

[0007] The present application provides an ion trap radio frequency driving device, comprising:

[0008] A sampling module is used to output a high-voltage signal of the ion trap radio frequency driving device and to sample the high-voltage signal to obtain a sampling signal;

[0009] A rectifying and filtering module electrically connected to the sampling module, used for rectifying and filtering the sampling signal to obtain a DC voltage signal;

[0010] A voltage source, used for providing a standard voltage reference signal;

[0011] A proportional-integral controller electrically connected to the rectification and filtering module and the voltage source, used for comparing the DC voltage signal with the standard voltage reference signal to obtain a feedback signal;

[0012] A radio frequency signal source, used for providing a local oscillator signal;

[0013] A mixer electrically connected to the proportional-integral controller and the RF signal source, used to adjust the RF output signal according to the local oscillator signal and the feedback signal to obtain a RF stable signal;

[0014] The power amplifier electrically connected to the mixer and the sampling circuit is used to amplify the radio frequency stabilization signal and output a high voltage signal through the sampling circuit.

[0015] Further, the sampling module includes a capacitive frequency divider, a first RC series circuit, and a second RC series circuit;

[0016] The capacitive frequency divider comprises a frequency division input terminal, a first frequency division output terminal, and a second frequency division output terminal;

[0017] The frequency division input terminal is connected to the power amplifier;

[0018] The first frequency division output terminal is respectively connected to one end of the first RC series circuit and the rectifier and filter circuit;

[0019] The second frequency division output terminal is connected to one end of the second RC series circuit;

[0020] The other end of the first RC series circuit and the other end of the second RC series circuit are grounded respectively;

[0021] The component parameters of the first RC series circuit and the second RC series circuit are the same.

[0022] Furthermore, the first RC series circuit includes a first resistor and a first capacitor;

[0023] The second RC series circuit includes a second resistor and a second capacitor;

[0024] One end of the first resistor is connected to the first frequency division output end, the other end of the first resistor is connected to one end of the first capacitor, and the other end of the first capacitor is grounded;

[0025] One end of the second resistor is connected to the second frequency-dividing output end, the other end of the second resistor is connected to one end of the second capacitor, and the other end of the second capacitor is grounded.

[0026] Furthermore, the rectification and filtering module includes a low-pass filter, an RC high-frequency filtering circuit, a first diode, a second diode, an RC parallel circuit, and an access capacitor;

[0027] The low-pass filter comprises a low-pass input terminal and a low-pass output terminal;

[0028] The RC high-frequency filter circuit includes a ground terminal, an output terminal, a first connection terminal, and a second connection terminal;

[0029] The access capacitor includes a first end and a second end;

[0030] The low-pass input end of the low-pass filter is connected to the output end of the RC high-frequency filter circuit, and the low-pass output end of the low-pass filter is connected to the proportional-integral controller;

[0031] The first connection end of the RC high-frequency filter circuit is connected to the cathode of the first diode, and the second connection end of the RC high-frequency filter circuit is connected to the anode of the second diode;

[0032] One end of the RC parallel circuit is connected to the anode of the first diode and the first end of the access capacitor respectively;

[0033] The other end of the RC parallel circuit is connected to the cathode of the second diode and is grounded;

[0034] The second end of the access capacitor is connected to the first frequency division output end.

[0035] Further, the RC parallel circuit includes a third capacitor and a third resistor;

[0036] One end of the third capacitor and the third resistor connected in parallel is respectively connected to the anode of the first diode and the first end of the access capacitor;

[0037] The other end of the third capacitor and the third resistor connected in parallel is connected to the cathode of the second diode and grounded.

[0038] Further, the RC high-frequency filter circuit includes a high-frequency filter capacitor, a fourth resistor, and a fifth resistor;

[0039] One end of the high-frequency filter capacitor is respectively connected to the low-pass input end of the low-pass filter, one end of the fourth resistor, and one end of the fifth resistor;

[0040] The other end of the high frequency filter capacitor is grounded;

[0041] The other end of the fourth resistor is connected to the cathode of the first diode;

[0042] The other end of the fifth resistor is connected to the anode of the second diode.

[0043] Furthermore, the critical frequency of the low-pass filter is 1 MHz.

[0044] Furthermore, the voltage source is a 5V standard voltage source.

[0045] Furthermore, it also includes an oscilloscope electrically connected to the proportional-integral controller for monitoring the feedback signal.

[0046] Furthermore, the power amplifier is a nonlinear amplifier.

[0047] The embodiments provided in this application have at least the following beneficial effects:

[0048] By setting up a separate sampling module to sample the high-voltage signal output by the power amplifier and provide a high-voltage signal to the ion trap at the same time, a more flexible way can be used to obtain the sampling signal, which provides more space for subsequent improvement of the sampling operation. Rectifying and filtering the sampling signal through the rectifier and filter module can reduce the influence of AC and clutter, and the obtained DC voltage signal is more accurate. By setting up a separate voltage source, a more accurate standard voltage reference signal can be provided for the proportional-integral controller. The proportional-integral controller can obtain a more accurate feedback signal with little external interference by processing the obtained DC voltage signal and the standard voltage reference signal. The mixer can adjust and process the local oscillator signal provided by the RF signal source according to the obtained feedback signal, so as to improve the stability of the output RF stable signal. After amplifying the RF stable signal, the power amplifier can provide a more stable high-voltage signal to the outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0050] Figure 1 A connection block diagram of an ion trap radio frequency driving device provided in an embodiment of the present application;

[0051] Figure 2 A schematic diagram of circuit connections of a sampling module in an ion trap radio frequency driving device provided in an embodiment of the present application;

[0052] Figure 3 A circuit connection block diagram of a rectifier and filter module in an ion trap radio frequency drive device provided in an embodiment of the present application;

[0053] Figure 4 A schematic diagram of the circuit connection of a rectifying and filtering module in an ion trap radio frequency driving device provided in an embodiment of the present application;

[0054] Figure 5 This is a schematic diagram of the internal circuit of a proportional-integral controller in an ion trap radio frequency drive device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0056] Please refer to Figure 1 The present application provides an ion trap radio frequency driving device, comprising:

[0057] A sampling module is used to output a high-voltage signal of the ion trap radio frequency driving device and to sample the high-voltage signal to obtain a sampling signal;

[0058] A rectifying and filtering module electrically connected to the sampling module, used for rectifying and filtering the sampling signal to obtain a DC voltage signal;

[0059] A voltage source, used for providing a standard voltage reference signal;

[0060] A proportional-integral controller electrically connected to the rectification and filtering module and the voltage source, used for comparing the DC voltage signal with the standard voltage reference signal to obtain a feedback signal;

[0061] A radio frequency signal source, used for providing a local oscillator signal;

[0062] A mixer electrically connected to the proportional-integral controller and the RF signal source, used to adjust the RF output signal according to the local oscillator signal and the feedback signal to obtain a RF stable signal;

[0063] The power amplifier electrically connected to the mixer and the sampling circuit is used to amplify the radio frequency stabilization signal and output a high voltage signal through the sampling circuit.

[0064] It should be noted that the sampling module in the present application is used to divide the amplified signal output by the power amplifier into two identical signals, one signal is used for sampling to obtain the sampling signal, and the other signal is used to output a high-voltage signal to the ion trap. The sampling signal is the same as the output high-voltage signal, so as to avoid adverse effects on the high-voltage signal output to the ion trap when obtaining the sampling signal. The amplified signal output by the power amplifier can be understood as a current radio frequency signal, and the current radio frequency signal has an amplitude. The sampling module can be understood as sampling the amplitude of the current radio frequency signal. After the sampling module obtains the sampling signal by sampling, it rectifies and filters the sampling signal through the rectifier and filter module, and converts the amplitude of the current radio frequency signal into a DC voltage. The DC voltage is input to the proportional integral controller, and the proportional integral controller here can be understood as a PI controller. The proportional integral controller compares the DC voltage obtained by sampling, rectifying and filtering, with the standard voltage reference signal provided by the voltage source, and outputs a corresponding feedback signal. The feedback signal and the local oscillator signal input by the radio frequency signal source adjust the radio frequency output of the mixer in real time to stabilize the radio frequency constraint potential, ensuring that a stable high-voltage signal is obtained at the output end of the resonant cavity. The present application forms a PI feedback system by combining a sampling module, a rectifier filter module, a proportional integral controller, etc. The PI feedback system improves the stability of the voltage at the output end of the spiral resonant cavity. The ion trap RF driving device in the present application has a good impedance matching effect, which greatly improves the stability of the ion trap RF driving circuit while performing high-performance work, and can achieve a good ion trapping effect. The present application realizes locking the RF voltage through a feedback loop. The ion trap RF driving device in the present application can be understood as a resonant cavity PI feedback system, which can be used for a variety of frequencies and achieve a high quality factor Q at room temperature, ensuring a large RF voltage gain and a high signal-to-noise ratio, and indicating a design route for improving the performance of the ion trap driving circuit. It should be pointed out that the three-dimensional constraints of the trap come from the static harmonic potential (axial) and the RF pseudo potential (transverse). The axial effective trap frequency is quite stable, while the transverse trap frequency fluctuates due to the instability of the RF field. Temperature drift and drifting stray capacitance will cause fluctuations in the trap drive amplitude, resulting in instability in the limiting potential. Therefore, the transverse long-term frequency will be unstable, which will have a negative impact on the fidelity of the gate operation, especially if the transverse mode is used to implement the dual-qubit gate. In order to mitigate these fluctuations, the present application provides an active stabilization system, namely an ion trap radio frequency drive device. The system can stabilize the atomic oscillation frequency of 1MHz to better than 10Hz or 10ppm. This means that the environmental noise on the radio frequency circuit is suppressed by 35dB. The technical solution requested for protection in the present application can effectively improve the sensitivity of ion trap mass spectrometry and the fidelity of quantum operations in ion trap quantum information applications.

[0065] Further, the sampling module includes a capacitive frequency divider, a first RC series circuit, and a second RC series circuit;

[0066] The capacitive frequency divider comprises a frequency division input terminal, a first frequency division output terminal, and a second frequency division output terminal;

[0067] The frequency division input terminal is connected to the power amplifier;

[0068] The first frequency division output terminal is respectively connected to one end of the first RC series circuit and the rectifier and filter circuit;

[0069] The second frequency division output terminal is connected to one end of the second RC series circuit;

[0070] The other end of the first RC series circuit and the other end of the second RC series circuit are grounded respectively;

[0071] The component parameters of the first RC series circuit and the second RC series circuit are the same.

[0072] It should be pointed out that the capacitive frequency divider here is used to divide the signal output by the power amplifier into two completely identical signals, so as to avoid affecting the signal output to the ion trap in order to obtain the sampling signal. The output signals of the first frequency division output terminal and the second frequency division output terminal of the capacitive frequency divider are the same. The first RC series circuit here is used to sample and feed back the sampling signal to the rectifier and filter module, and the second RC series circuit here is used to output a voltage signal to the ion trap. The input signal of the frequency division input terminal is divided into two completely identical signals output by the first frequency division output terminal and the second frequency division output terminal by the capacitive frequency divider, and the signal is sampled by combining the first RC series circuit and the second RC series circuit with the same component parameters, and the sampling signal is fed back to the rectifier and filter module connected to the first RC series circuit, which can effectively prevent the situation where the stability of the voltage signal output to the ion trap is affected by adding a sampling circuit and a feedback circuit. The first RC series circuit and the second RC series circuit here can be an RC series circuit obtained by connecting a simple resistor and at least one capacitor in series, or an RC series circuit obtained by connecting a resistor combination composed of multiple resistors and at least one capacitor in series. In a specific embodiment, the capacitive frequency divider in the sampling module divides the output signal of the power amplifier into two completely identical signals, one of which is used as a sampling signal, and the other is used as an output signal of the resonant cavity output end. The first frequency division output end of the capacitive frequency divider is connected to the first RC series circuit to provide a sampling signal for the rectifier and filter module. Before the capacitive frequency divider is used, the output end of the power amplifier can be understood as the output end of the resonant cavity. After the capacitive frequency divider is used, the second RC series circuit connected to the second frequency division output end of the capacitive frequency divider is used as the resonant cavity output end to provide a stable high-voltage signal to the outside, ensuring that the stability of the ion trap radio frequency drive circuit can be greatly improved while performing high-performance work, and a good ion trapping effect can be achieved. The present application locks the radio frequency voltage through a feedback loop. The ion trap radio frequency drive device can be used for multiple frequencies and achieves a high quality factor Q at room temperature, ensuring a large radio frequency voltage gain and a high signal-to-noise ratio, which can effectively improve the sensitivity of the ion trap mass spectrometer and the fidelity of quantum operations in ion trap quantum information applications, and points out a design route for improving the performance of the ion trap drive circuit.

[0073] For further information, please refer to Figure 2 , the first RC series circuit includes a first resistor Rt1 and a first capacitor Ct1;

[0074] The second RC series circuit includes a second resistor Rt2 and a second capacitor Ct2;

[0075] One end of the first resistor Rt1 is connected to the first frequency division output end, the other end of the first resistor Rt1 is connected to one end of the first capacitor Ct1, and the other end of the first capacitor Ct1 is grounded;

[0076] One end of the second resistor Rt2 is connected to the second frequency-dividing output end, the other end of the second resistor Rt2 is connected to one end of the second capacitor Ct2, and the other end of the second capacitor Ct2 is grounded.

[0077] It should be noted that the component parameters of the first resistor Rt1 and the first capacitor Ct1 in the first RC series circuit need to be consistent with the component parameters of the second resistor Rt2 and the second capacitor Ct2 in the second RC series circuit. The first resistor Rt1 and the second resistor Rt2 here can use adjustable resistors with the same model parameters, or fixed value resistors with the same model parameters. When the first resistor Rt1 and the second resistor Rt2 can use adjustable resistors with the same model parameters, the resistance values ​​finally adjusted by the two need to be consistent. The first capacitor Ct1 and the second capacitor Ct2 here can use adjustable capacitors with the same model parameters, or fixed value capacitors with the same model parameters. When the first capacitor Ct1 and the second capacitor Ct2 use adjustable capacitors with the same model parameters, the capacitance values ​​finally adjusted by the two need to be consistent. In a preferred embodiment, the first resistor Rt1 and the second resistor Rt2 here use ordinary fixed value resistors with fixed resistance values, and the first capacitor Ct1 and the second capacitor Ct2 here use ordinary fixed value capacitors with fixed capacitance values. In a specific implementation, the first resistor Rt1 and the second resistor Rt2 can respectively use fixed-value resistors with a resistance value of 10Ω, and the first capacitor Ct1 and the second capacitor Ct2 can respectively use fixed-value capacitors with a capacitance value of 4pF. It can be understood that the series connection sequence of the first resistor Rt1 and the first capacitor Ct1 can be interchanged, and the series connection sequence of the second resistor Rt2 and the second capacitor Ct2 can also be interchanged. When the series connection sequence of the first resistor Rt1 and the first capacitor Ct1 is interchanged, the series connection sequence of the second resistor Rt2 and the second capacitor Ct2 is also interchanged, so as to ensure that the output of the first frequency-dividing output terminal and the second frequency-dividing output terminal is consistent.

[0078] For further information, please refer to Figure 3 The rectification and filtering module includes a low-pass filter, an RC high-frequency filtering circuit, a first diode D1, a second diode D2, an RC parallel circuit, and an access capacitor Cd1;

[0079] The low-pass filter comprises a low-pass input terminal and a low-pass output terminal;

[0080] The RC high-frequency filter circuit includes a ground terminal, an output terminal, a first connection terminal, and a second connection terminal;

[0081] The access capacitor Cd1 includes a first end and a second end;

[0082] The low-pass input end of the low-pass filter is connected to the output end of the RC high-frequency filter circuit, and the low-pass output end of the low-pass filter is connected to the proportional-integral controller;

[0083] The first connection end of the RC high-frequency filter circuit is connected to the cathode of the first diode D1, and the second connection end of the RC high-frequency filter circuit is connected to the anode of the second diode D2;

[0084] One end of the RC parallel circuit is connected to the anode of the first diode D1 and the first end of the access capacitor Cd1 respectively;

[0085] The other end of the RC parallel circuit is connected to the cathode of the second diode D2 and grounded;

[0086] The second end of the access capacitor Cd1 is connected to the first frequency division output end.

[0087] It should be pointed out that the low-pass filter has the function of passing low frequencies and blocking high frequencies. The RC high-frequency filter circuit here is used to filter high-frequency signals. The first diode D1 and the second diode D2 are used for rectification. The sampling signal of the first frequency-dividing output terminal is obtained by the RC parallel circuit and the access capacitor Cd1. The first diode D1 and the second diode D2 here can be understood as diodes, preferably rectifier diodes. The RC high-frequency filter circuit here can be composed of at least one resistor connected between the cathode of the first diode D1 and the low-pass input terminal of the low-pass filter, at least one resistor connected between the anode of the second diode D2 and the low-pass input terminal of the low-pass filter, and at least one capacitor connected between the low-pass input terminal of the low-pass filter and the ground. The RC parallel circuit here can be a simple RC parallel circuit obtained by connecting a resistor and a capacitor in parallel, or a resistor combination formed by a plurality of resistors and a capacitor combination formed by a plurality of capacitors in parallel, or a resistor combination formed by a plurality of resistors and a capacitor combination formed by a plurality of capacitors in parallel, or a resistor combination formed by a plurality of resistors and a capacitor combination formed by a plurality of capacitors in parallel, or a resistor combination formed by a plurality of resistors and a capacitor combination formed by a plurality of capacitors in parallel, or a resistor combination formed by a plurality of resistors and a capacitor combination formed by a plurality of capacitors in parallel. In a preferred embodiment, the component parameters of the first diode D1 and the second diode D2 are the same. The access capacitor Cd1 here can be an adjustable capacitor with an adjustable capacitance value, or a fixed value capacitor with a fixed capacitance value. The access capacitor Cd1 here is preferably a fixed value capacitor with a fixed capacitance value. In a specific embodiment, the access capacitor Cd1 here can be a fixed value capacitor with a capacitance value of 0.2pF. It can be understood that in order to control the sampling signal in real time or conduct simulation experiments, probes can be connected to both ends of the access capacitor Cd1 during the specific implementation, and the voltage conditions at both ends of the capacitor Cd1 can be detected as needed to obtain the voltage condition of the sampling signal, so as to judge the operation of the ion trap radio frequency drive device.

[0088] For further information, please refer to Figure 4 , the RC parallel circuit includes a third capacitor Ct3 and a third resistor Rt3;

[0089] One end of the third capacitor Ct3 and the third resistor Rt3 connected in parallel is respectively connected to the anode of the first diode D1 and the first end of the access capacitor Cd1;

[0090] The other end of the third capacitor Ct3 and the third resistor Rt3 connected in parallel is connected to the cathode of the second diode D2 and grounded.

[0091] It can be understood that the third capacitor Ct3 here can be understood as an ordinary capacitor, and the third resistor Rt3 here can be understood as an ordinary resistor. The RC parallel circuit here is composed of the third capacitor Ct3 and the third resistor Rt3 in parallel, and the third capacitor Ct3 and the third resistor Rt3 can both pass alternating current, and the magnitude of the alternating current is determined by the resistance of the third resistor Rt3 and the capacitive reactance of the third capacitor Ct3. The third capacitor Ct3 here can adopt an adjustable capacitor with adjustable capacitance value, or a fixed value capacitor with fixed capacitance value, and the third capacitor Ct3 here preferably has a fixed value capacitor with fixed capacitance value. The third resistor Rt3 here can adopt an adjustable resistor with adjustable resistance value, or a fixed value resistor with fixed resistance value, and the third resistor Rt3 here preferably has a fixed value resistor with fixed resistance value. In a specific embodiment, the third capacitor Ct3 here can adopt a fixed value capacitor with a capacitance value of 20pF, and the third resistor Rt3 here can adopt a fixed value resistor with a resistance value of 3kΩ.

[0092] For further information, please refer to Figure 4 , the RC high-frequency filter circuit includes a high-frequency filter capacitor Cd2, a fourth resistor Rt4, and a fifth resistor Rt5;

[0093] One end of the high-frequency filter capacitor Cd2 is respectively connected to the low-pass input end of the low-pass filter, one end of the fourth resistor Rt4, and one end of the fifth resistor Rt5;

[0094] The other end of the high frequency filter capacitor Cd2 is grounded;

[0095] The other end of the fourth resistor Rt4 is connected to the cathode of the first diode D1;

[0096] The other end of the fifth resistor Rt5 is connected to the anode of the second diode D2.

[0097] It should be pointed out that the high-frequency filter capacitor Cd2 here can be understood as an ordinary capacitor, and the fourth resistor Rt4 and the fifth resistor Rt5 here can be understood as ordinary resistors. The high-frequency filter capacitor Cd2 here can adopt an adjustable capacitor with adjustable capacitance value, or a fixed value capacitor with fixed capacitance value. The high-frequency filter capacitor Cd2 here is preferably a fixed value capacitor with fixed capacitance value. The high-frequency filter capacitor Cd2 here can be used to filter high-frequency signals. It should be noted that the fourth resistor Rt4 and the fifth resistor Rt5 here can respectively adopt adjustable resistors with the same model parameters of adjustable resistance value, or respectively adopt fixed value resistors with the same model parameters of fixed resistance value. The fourth resistor Rt4 and the fifth resistor Rt5 here are preferably fixed value resistors with fixed resistance value. When the fourth resistor Rt4 and the fifth resistor Rt5 here respectively adopt adjustable resistors with adjustable resistance value, the resistance values ​​finally adjusted by the two need to be consistent. In a specific implementation process, the sampling signal enters the rectifier filter module through the access capacitor Cd1, is processed by the RC parallel circuit in the rectifier filter module, and further rectified by the first diode D1 and the second diode D2, and then high-frequency filtering is performed by the RC high-frequency filter circuit, and finally further low-pass filtering is performed by the low-pass filter according to the set critical value frequency (FC), and finally a DC voltage signal is obtained. The proportional integral controller compares the received DC voltage signal with the standard voltage reference signal obtained by the voltage source, and finally obtains and outputs a feedback signal. In a preferred embodiment, the fourth resistor Rt4 and the fifth resistor Rt5 have the same component parameters, the high-frequency filter capacitor Cd2 here can use a fixed value capacitor with a capacitance value of 100pF, and the fourth resistor Rt4 and the fifth resistor Rt5 here can respectively use fixed value resistors with a resistance value of 5kΩ.

[0098] Furthermore, the critical frequency of the low-pass filter is 1 MHz.

[0099] It can be understood that when the low-pass filter is working, the signal with a frequency lower than the set critical value (FC) can pass normally, while the signal with a frequency higher than the set critical value is blocked and attenuated. When the low-pass filter performs low-pass filtering, it can be understood as setting a frequency point. When the signal frequency is higher than this set frequency point, it cannot pass through the low-pass filter. Please refer to Figure 3 and Figure 4 , the critical frequency of the low-pass filter in the present application is preferably set to FC=1MHz.

[0100] Furthermore, the voltage source is a 5V standard voltage source.

[0101] It should be noted that the proportional-integral controller in this application requires a standard voltage reference signal input. Figure 5, the proportional-integral controller in this application includes an input terminal vref, an input terminal vsense, and an output terminal vctrl. The proportional-integral controller in this application is composed of an operational amplifier, a resistor R1, a resistor R2, a capacitor C1, a capacitor C2, etc. The voltage source in this application provides a standard voltage reference signal for the proportional-integral controller through the vref interface. When the voltage source here adopts a 5V standard voltage source, the negative pole of the voltage source is grounded, and the positive pole of the voltage source is connected to the vref interface of the proportional-integral controller. The 5V standard voltage source provides a 5V standard voltage reference signal for the proportional-integral controller through the vref interface. The DC voltage signal output by the rectifier and filter module is input to the proportional-integral controller through the vsense interface. The proportional-integral controller outputs a feedback signal through the output terminal vctrl by comparing the DC voltage signal with the standard voltage reference signal. In a specific implementation, the positive input terminal of the operational amplifier in the proportional-integral controller serves as the input terminal vref of the proportional-integral controller, the negative input terminal of the operational amplifier is connected to one end of the resistor R1, the other end of the resistor R1 serves as the input terminal vsense of the proportional-integral controller, and the output terminal of the operational amplifier serves as the output terminal vctrl of the proportional-integral controller. A capacitor C2 is connected in parallel between the negative input terminal and the output terminal of the operational amplifier, and an RC series circuit obtained by connecting the capacitor C1 and the resistor R2 in series is also connected in parallel.

[0102] Furthermore, it also includes an oscilloscope electrically connected to the proportional-integral controller for monitoring the feedback signal.

[0103] It is understandable that the oscilloscope can be used to display various waveform signals according to voltage or current, etc., so that the user can intuitively obtain test data. The feedback signal output by the proportional integral controller in this application can display the corresponding waveform through the connected oscilloscope, helping the user to grasp the working status of the ion trap RF drive device in time and improve work efficiency.

[0104] Furthermore, the power amplifier is a nonlinear amplifier.

[0105] It should be noted that the nonlinear amplifier here can be understood as a power amplifier using pulse modulation technology.

[0106] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0107] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0108] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. An ion trap radio frequency driving device, characterized in that: include: A sampling module is used to output a high-voltage signal of the ion trap radio frequency driving device and to sample the high-voltage signal to obtain a sampling signal; A rectifying and filtering module electrically connected to the sampling module, used for rectifying and filtering the sampling signal to obtain a DC voltage signal; A voltage source, used for providing a standard voltage reference signal; A proportional-integral controller electrically connected to the rectification and filtering module and the voltage source, used for comparing the DC voltage signal with the standard voltage reference signal to obtain a feedback signal; A radio frequency signal source, used for providing a local oscillator signal; A mixer electrically connected to the proportional-integral controller and the RF signal source, used to adjust the RF output signal according to the local oscillator signal and the feedback signal to obtain a RF stable signal; A power amplifier electrically connected to the mixer and the sampling circuit, used to amplify the radio frequency stabilization signal and output a high voltage signal through the sampling circuit; The sampling module includes a capacitive frequency divider, a first RC series circuit, and a second RC series circuit; The capacitive frequency divider comprises a frequency division input terminal, a first frequency division output terminal, and a second frequency division output terminal; The frequency division input terminal is connected to the power amplifier; The first frequency division output terminal is respectively connected to one end of the first RC series circuit and the rectifier and filter circuit; The second frequency division output terminal is connected to one end of the second RC series circuit; The other end of the first RC series circuit and the other end of the second RC series circuit are grounded respectively; The component parameters of the first RC series circuit and the second RC series circuit are the same.

2. The ion trap radio frequency driving device according to claim 1, characterized in that: The first RC series circuit includes a first resistor and a first capacitor; The second RC series circuit includes a second resistor and a second capacitor; One end of the first resistor is connected to the first frequency division output end, the other end of the first resistor is connected to one end of the first capacitor, and the other end of the first capacitor is grounded; One end of the second resistor is connected to the second frequency-dividing output end, the other end of the second resistor is connected to one end of the second capacitor, and the other end of the second capacitor is grounded.

3. The ion trap radio frequency driving device according to claim 1, characterized in that: The rectification and filtering module includes a low-pass filter, an RC high-frequency filtering circuit, a first diode, a second diode, an RC parallel circuit, and an access capacitor; The low-pass filter comprises a low-pass input terminal and a low-pass output terminal; The RC high-frequency filter circuit includes a ground terminal, an output terminal, a first connection terminal, and a second connection terminal; The access capacitor includes a first end and a second end; The low-pass input end of the low-pass filter is connected to the output end of the RC high-frequency filter circuit, and the low-pass output end of the low-pass filter is connected to the proportional-integral controller; The first connection end of the RC high-frequency filter circuit is connected to the cathode of the first diode, and the second connection end of the RC high-frequency filter circuit is connected to the anode of the second diode; One end of the RC parallel circuit is connected to the anode of the first diode and the first end of the access capacitor respectively; The other end of the RC parallel circuit is connected to the cathode of the second diode and is grounded; The second end of the access capacitor is connected to the first frequency division output end.

4. The ion trap radio frequency driving device according to claim 3, characterized in that: The RC parallel circuit includes a third capacitor and a third resistor; One end of the third capacitor and the third resistor connected in parallel is respectively connected to the anode of the first diode and the first end of the access capacitor; The other end of the third capacitor and the third resistor connected in parallel is connected to the cathode of the second diode and grounded.

5. The ion trap radio frequency driving device according to claim 3, characterized in that: The RC high-frequency filter circuit includes a high-frequency filter capacitor, a fourth resistor, and a fifth resistor; One end of the high-frequency filter capacitor is respectively connected to the low-pass input end of the low-pass filter, one end of the fourth resistor, and one end of the fifth resistor; The other end of the high frequency filter capacitor is grounded; The other end of the fourth resistor is connected to the cathode of the first diode; The other end of the fifth resistor is connected to the anode of the second diode.

6. The ion trap radio frequency driving device according to claim 3, characterized in that: The critical frequency of the low-pass filter is 1 MHz.

7. The ion trap radio frequency driving device according to claim 1, characterized in that: The voltage source is a 5V standard voltage source.

8. The ion trap radio frequency driving device according to claim 1, characterized in that: An oscilloscope electrically connected to the proportional-integral controller is also included to monitor the feedback signal.

9. The ion trap radio frequency driving device according to claim 1, characterized in that: The power amplifier is a nonlinear amplifier.

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