276 results about "Self excited oscillation" patented technology

The embodiment of the invention discloses a light amplification device and a related system and method. The light amplification device comprises an optical fiber isolator, a pump light source, a beam combiner and an EYDF. A large amount of pump light in the EYDF cannot be completely absorbed by ytterbium ions, and ytterbium-band ASE light generated by the ytterbium ions can be further amplified by the pump light, so that effective amplification of signal light by the pump light is limited by the ytterbium-band ASE light. According to the embodiment of the invention, the optical fiber isolator in the light amplification device is modified, the optical fiber isolator can reflect the ytterbium-band ASE light as an auxiliary signal back to the EYDF, the excited amplification of the auxiliary signal and the absorption of the auxiliary signal by the EYDF can effectively inhibit the EYDF from generating the ytterbium-band ASE light, the self-oscillation and self-pulsation of the ytterbium-band ASE light are avoided, and the reliability of the light amplification device is improved. Therefore, the pumping conversion efficiency and the stability of the output power are improved. Meanwhile, the optical amplification device provided by the embodiment of the invention can effectively inhibit the EYDF from generating the ytterbium-band ASE light without adding an additional device, and is beneficial to reducing the cost and the power consumption.

The invention relates to a self-oscillation fluxgate sensor and a measuring system, and relates to the technical field of electrical variable measurement. The self-oscillation fluxgate sensor comprises a detection assembly used for being connected with a detected wire and used for sensing a detected electric signal on the detected wire; the measurement and control circuit is used for providing a control signal; the feedback filter circuit is connected with the measurement and control circuit and is used for filtering the control signal, outputting a reference signal and adjusting the output reference signal according to the reference signal and the filtered control signal; the driving excitation circuit is respectively connected with the detection assembly, the feedback filter circuit and the measurement and control circuit, and is used for carrying out self-oscillation according to the reference signal and the detected electric signal and generating excitation current; and the measurement and control circuit is also used for determining a measurement value of the measured electric signal according to the excitation current. The method can improve the measurement precision.

The invention discloses a joint heat dissipation structure and a robot in the technical field of robots. The joint heat dissipation structure comprises a joint, the joint is provided with a shell, a containing cavity is formed in the inner side of the shell, a motor is fixedly arranged in the containing cavity, the joint heat dissipation structure is further provided with a heat dissipation assembly used for reducing the temperature in the containing cavity, the heat dissipation assembly is a pulsating heat pipe, and the pulsating heat pipe comprises an evaporation section and a condensation section. The evaporation section is attached to the outer wall of the motor, and the condensation section is attached to the inner wall of the shell. The pulsating heat pipe is used for heat dissipation, based on the phase change heat transfer principle, no extra fan or pump is needed, self-oscillation flowing is achieved completely through thermal driving, and the overall energy consumption of the robot is remarkably reduced. The pulsating heat pipe is small in occupied space, light in weight, simple in structure, low in maintenance cost and suitable for long-term operation, and joint movement flexibility and load capacity are effectively improved; the condensation section is attached to the inner wall of the shell, the joint shell can be heated while heat dissipation is conducted, and the warm touch feeling can be provided without extra energy consumption.

The invention belongs to the technical field of high-pressure water jet rock breaking and well drilling, and particularly relates to a double-self-oscillation pulse porous water jet nozzle which comprises a water jet input section, a water jet output section and a water jet output section. The self-excited oscillation cavity section is detachably connected with the water jet input section, a first self-excited oscillation part is arranged at one end of the self-excited oscillation cavity section and used for conducting first-time self-excited oscillation on high-pressure water, and a second self-excited oscillation part is arranged at the other end of the self-excited oscillation cavity section and used for conducting second-time self-excited oscillation on high-pressure water; the second self-excited oscillation part is used for carrying out second self-excited oscillation on the high-pressure water subjected to the first self-excited oscillation; the water jet output section is detachably connected with the self-excited oscillation cavity section, a third self-excited oscillation part is arranged at one end of the water jet output section, the third self-excited oscillation part and the second self-excited oscillation part jointly carry out second-time self-excited oscillation on the high-pressure water, and a porous jet part is arranged at the other end of the water jet output section and communicates with the third self-excited oscillation part.

The invention provides a multi-feedback-channel fluid oscillator, and belongs to the technical field of fluid jetting devices. Comprising an oscillation cavity, an inlet, a nozzle and at least three feedback channels, the inlet is formed in one end of the oscillation cavity, the nozzle is formed in the other end of the oscillation cavity, the nozzle and the inlet are oppositely arranged along the central axis of the oscillation cavity, and the feedback channels are circumferentially distributed around the central axis of the oscillation cavity. And each feedback channel is provided with a feedback channel inlet and a feedback channel outlet. Through the configuration design of the multiple feedback channels, the fluid can form feedback control flow through the feedback channels, and the fluid entering the oscillation cavity through the inlet flows along the wall of the oscillation cavity in multiple directions and is switched through the coupling effect of the fluid coanda effect and multi-channel backflow feedback. And finally, multi-direction sweeping self-oscillation jet flow is formed at the nozzle, so that the space coverage range and the atomization efficiency of the jet flow are greatly improved.

The invention discloses a single-magnet-ring dual-processing-circuit switching wide-range leakage current sensor and method. A magnetic core works in a deep magnetic saturation state based on a magnetic modulation principle and is used for sensing a leakage current signal; the square wave self-oscillation circuit is used for sending a square wave signal to the coil by utilizing the inductance effect of the coil; each of the two signal processing circuits comprises a filter, a proportional amplifier and a lock-in amplifier, and only amplification factors of the proportional amplifiers are different, and the proportional amplifiers are used for processing induced leakage current signals; and the microprocessor is used for analyzing and processing the signal output by the signal processing circuit. The system can monitor the insulation state of the energy storage system in real time, effectively improves the safety and reliability of the system, and is suitable for photovoltaic power generation, wind power generation and other application scenes related to the energy storage system.

The invention discloses a feedback oscillator structure applied to a traveling wave tube. The feedback oscillator structure comprises a waveguide structure, a resonant cavity frequency selection structure and a waveguide power regulation structure which are connected in sequence, the input end of the waveguide structure is connected to the output end of the traveling wave tube, the waveguide structure and the resonant cavity frequency selection structure are connected through a coupling gap, the resonant cavity frequency selection structure and the waveguide power regulation structure are connected through a coupling gap, and the output end of the waveguide power regulation structure is connected to the input end of the traveling wave tube; by utilizing the frequency selection characteristic of the resonant cavity frequency selection structure, the resonant cavity eigenfrequency part in clutters output by the output end of the traveling wave tube is selected, and the clutters are input into the input end of the traveling wave tube again after the power is adjusted, so that the self-oscillation of the traveling wave tube with the adjustable frequency is realized. The feedback oscillator structure does not need a solid-state oscillation source, realizes high-power output of the traveling wave tube when input signals are not added in a terahertz frequency band, has a frequency modulation function, and is relatively pure in frequency spectrum of output signals.

The invention discloses an aeration generation system containing a self-excited oscillation turbulent shearing device and an application method of the aeration generation system. The aeration generation system comprises the self-excited oscillation turbulent shearing device, a water inlet unit, an air inlet unit and an aeration tank, wherein the water inlet unit and the air inlet unit are connected to the upstream of the self-excited oscillation turbulent shearing device, and the aeration tank is connected to the downstream of the self-excited oscillation turbulent shearing device. According to the method, through cooperative regulation and control of micro-channel geometric parameters and fluid dynamics, accurate control over the size and distribution of the bubbles is achieved, the particle size is concentrated, and particle size dispersion caused by random breaking or insufficient turbulent shearing in a traditional method is avoided. Only a low-pressure pump is needed to drive fluid, a high-pressure container and a high-power ultrasonic or electrode assembly are not needed, energy consumption is greatly reduced, the risk of electrode passivation or membrane pollution is avoided, and the device is suitable for fluid containing particulate matter or high-turbidity fluid. The provided self-oscillation turbulent shearing device is not provided with a micro-channel, is different from an existing nano bubble generator which must be provided with a releaser, and is not easy to block.

The invention provides a self-excited cesium optical pump atomic magnetometer and a magnetic field measurement method. The magnetometer comprises a physical probe part and a circuit part. The physical probe part comprises a cesium spectrum lamp, an optical element, a cesium atom absorption gas chamber, a radio frequency coil and a photoelectric detector; the circuit part comprises a photoelectric conversion circuit, a phase-locked amplification circuit and a radio frequency excitation circuit modulated by square waves. A macroscopic magnetic moment is generated by pumping cesium atoms through left-handed circularly polarized light, a radio frequency magnetic field induces Larmor precession, light intensity changes are detected and fed back to a radio frequency coil to form self-oscillation, and the external magnetic field intensity is calculated according to the linear relation between oscillation frequency and the magnetic field. Square wave modulation is adopted to broaden the measurement bandwidth, a magnetic field direction adjusting system is additionally arranged to automatically keep an angle of 45 degrees between an optical axis and a magnetic field so as to eliminate a blind area, the hemisphere automatic switching function is achieved, and the advantages of being high in sensitivity, fast in response, high in adaptability, small in size and low in power consumption are achieved.

The invention provides a quartz crystal microbalance resonant frequency detection system, a control method and a terminal, a direct digital frequency synthesis excitation unit is adopted to generate a frequency sweep excitation signal with a preset frequency range and stepping, and the frequency sweep excitation signal is conditioned by a signal injection and conditioning unit and then injected into a QCM sensor. And then the pure amplitude response detection unit measures and quantifies voltage response amplitudes of the QCM sensor under different excitation frequencies, and the resonant frequency intelligent determination unit determines the resonant frequency of the QCM sensor according to the voltage response amplitudes. According to the invention, a QCM self-oscillation circuit does not need to be designed and debugged, a precise phase detection assembly does not need to be configured, the circuit board layout is simpler, and components are greatly reduced. The QCM resonant frequency can be accurately measured only through efficient amplitude detection, a complex algorithm is avoided, the operational capability requirement and the software development difficulty are reduced, the QCM resonant frequency measuring device has the advantages of being simple in structure, low in cost, easy to integrate and the like, miniaturization and low-power-consumption design can be easily achieved, and the QCM resonant frequency measuring device is suitable for portable and wearable application.

The invention provides a handheld shock wave generating system which comprises a shock wave balloon and a driving circuit, and the driving circuit comprises a primary power supply circuit, a high-voltage booster circuit, a voltage doubling circuit and a control circuit. After a voltage signal VCCS2 output by the primary power supply circuit is subjected to self-oscillation and boosting of the high-voltage boosting circuit and multiple rounds of voltage multiplication of the voltage doubling circuit, the voltage signal VCCS2 can be increased by hundreds or even thousands of times, a storage battery and a mains supply do not need to be used, miniaturization can be achieved, and carrying is convenient.

A tactile sense presentation device includes a vibration unit including a piezoelectric element and having a resonance point in a tactile sense frequency band; and a self-oscillation circuit electrically coupled to the vibration unit, in which the piezoelectric element self-oscillates in a frequency band based on the resonance point by a drive voltage input from the self-oscillation circuit according to contact with the vibration unit.

The invention relates to a zero-flux closed-loop circuit which comprises a self-oscillation fluxgate current sensor, a magnetic integrator and a feedback circuit. Wherein the self-oscillation fluxgate current sensor can generate a magnetic field signal under the action of excitation current, the magnetic integrator can generate a corresponding voltage signal according to the magnetic field signal, the feedback circuit can generate a feedback signal according to the magnetic field intensity corresponding to the voltage signal, and the feedback signal acts on the self-oscillation fluxgate current sensor. Therefore, the self-oscillation fluxgate current sensor adjusts the excitation current, thereby ensuring that the magnetic flux of a fluxgate of the self-oscillation fluxgate current sensor is kept near a zero magnetic flux point. Therefore, through the zero-magnetic-flux closed-loop circuit, the electrified current of the electrified wire can be detected in a zero-magnetic-flux environment, the influence of noise can be effectively reduced, the distortion degree of signals is reduced, and the precision of current detection is improved.

The invention provides an ultra wide band millimeter wave transition structure based on gold wire bonding, and relates to the technical field of millimeter wave chip packaging, and the transition structure comprises a substrate, a rectangular cavity, a chip, a parallel gold wire connection structure, a stepped grounding coplanar waveguide GCPW matching structure, and a plurality of blind holes. The substrate comprises a top dielectric layer, a middle metal layer and a bottom metal layer, the rectangular cavity is arranged on the top dielectric layer; the chip is fixed in the rectangular cavity; the parallel gold wire connecting structure is used for connecting the chip and the stepped grounding coplanar waveguide GCPW matching structure; and the plurality of blind holes vertically penetrate through the substrate, are positioned in an area right below the edge of the rectangular cavity and gold wire bonding, are connected with the middle metal layer and the bottom metal layer, and are used for suppressing self-excited oscillation. According to the method provided by the invention, the transition from the chip to the substrate with the average loss lower than 0.28 dB is realized within the frequency band of 30-100GHz.

The frequency modulation MEMS accelerometer comprises a resonator I and a resonator II which are in central symmetry, the resonator I and the resonator II are connected to a mass block in a bilateral symmetry mode, and each of the resonator I and the resonator II comprises an annular structure located in the middle. The middle annular structure is connected with a center anchor point located in the middle of the annular structure through four sets of first decoupling beams, the center anchor point is fixed to the substrate, the left side and the right side of the annular structure are each connected with a driving detection electrode, and the front side and the rear side of the annular structure are each connected with an electrostatic tuning electrode. The driving detection electrodes and the electrostatic tuning electrodes are variable-area comb teeth electrodes, the left side and the right side of each electrostatic tuning electrode are connected with the front end and the rear end of the displacement balance lever on the left side and the right side respectively, and the front end and the rear end of each displacement balance lever are connected with the L-shaped beams on the front side and the rear side through second decoupling beams respectively. According to the invention, the inherent frequency of the resonator can be accurately captured through self-oscillation, and the control precision is improved.

The invention provides a reconfigurable network-fused high-efficiency power amplifier and a design method thereof, and a circuit structure comprises an input fundamental wave broadband matching network, an input reconfigurable network, a stabilizing circuit, a biasing circuit, an output harmonic control network, an output fundamental wave broadband matching network and an output reconfigurable network, wherein the input fundamental wave broadband matching adopts conjugate matching and is mainly responsible for optimizing small signal parameters of the circuit; the stabilizing circuit is a lossy network, so that self-oscillation caused by overlarge gain of the circuit is prevented; the biasing circuit provides direct-current voltage for the transistor; and an output fundamental wave broadband matching network in the output matching network adopts power matching and is mainly responsible for optimizing the output power and efficiency of the circuit under a large signal. According to the power amplifier, the reconfigurable network connected with the switching devices is adopted, and switching of the working frequency bands of the power amplifier is controlled. Finally, the harmonic control type reconfigurable high-efficiency power amplifier which can be applied to Bluetooth, Wi-Fi, radar and base station communication is realized.

The invention relates to an audio decoding output stage circuit and audio equipment, the audio decoding output stage circuit comprises an I / V conversion module and a low-pass filtering module, and the I / V conversion module comprises a conversion circuit, a crossed diamond amplification circuit, an overcurrent protection circuit and a Roche network circuit; the conversion circuit comprises a JFET (Junction Field Effect Transistor) audio operational amplifier chip and an I / V (Input / Output) conversion resistor and is used for converting an input current into an analog voltage signal; the crossed diamond amplifying circuit can reduce the input offset voltage; the over-current protection circuit can carry out over-current protection; the rowbell network circuit can prevent high-frequency self-oscillation of the power output stage; and the low-pass filtering module comprises a filtering circuit and an ultrahigh frequency filtering circuit arranged at the output end of the audio decoding output stage circuit. The scheme can bring high-performance sound performance, and has the advantages of lower distortion, higher conversion rate, low output impedance and large pushing current.

The invention provides a radio frequency power generator, and relates to the technical field of radio frequency. The radio frequency power generator is characterized in that a first input end of an inverter module is connected with a second output end of an oscillation module; the first output end of the inverter module is connected with the second input end of the oscillation module; the power output end of the voltage stabilizing circuit is connected with the power supply voltage input end of the phase inverter module; the power supply input end of the voltage stabilizing circuit inputs external direct-current voltage; the voltage stabilizing circuit generates a target direct-current voltage according to the external direct-current voltage and the sine wave reference amplitude, and inputs the target direct-current voltage into the power supply voltage input end; the oscillation module performs self-oscillation and generates an initial sine wave signal; and the inverter module amplifies the initial sine wave signal according to the target DC voltage, and inputs the amplified initial sine wave signal to the oscillation module, so that the signal output end of the oscillation module outputs a target sine wave signal. According to the invention, the convenience of amplitude adjustment of the radio frequency signal is improved.

The utility model discloses a mining broadcast signal transmission control system, which comprises a main control module, an audio drive circuit, a high-frequency signal detection circuit, an audio filter circuit, a self-oscillation circuit and a power supply module, the main control module is connected with the input end of the audio drive circuit, and the output end of the audio drive circuit is connected with the input end of the audio filter circuit through a two-core cable; the input end of the self-oscillation circuit is connected with the input end of the audio filter circuit, and the output end of the self-oscillation circuit is connected with the main control module; the input end of the high-frequency signal detection circuit is connected with the input end of the audio filter circuit, and the output end of the high-frequency signal detection circuit is connected with the main control module; and the power supply module is used for supplying power to other modules in the mining broadcast signal transmission control system. The utility model provides a mining broadcast signal transmission control system, which can realize simultaneous transmission of audio signals and control signals, and solves the problems of difficult maintenance and low transmission efficiency.

The present application belongs to the field of fans and relates to a fan fault detection method, device, computer equipment and storage medium. The method includes the following steps: configuring the fan type and speed fault threshold; calculating the fan fault signal frequency and processing the fan feedback signal flip flag based on the configuration of the fan type and speed fault threshold; adaptively adjusting the cycle time of a single fan based on the fan fault signal frequency and the fan feedback signal flip flag; determining the current fan order based on the actual cycle time of the single fan by counting through a DSP time base counter; determining the fan type of the currently determined fan based on the fan order and the fan type configured during initialization, and determining the fan fault. By using a multiplexing switch and one isolation device to detect fan faults, the detection circuit is simple and can detect multiple sets of fan fault feedback signals simultaneously, reducing costs; generating a control signal through self-excited oscillation, it is convenient for fans with different fault feedback signals to be compatible.

The application provides a salt-preventing ocean high-pressure water pump port ring structure based on coupled oscillation, and belongs to the technical field of ocean water pump equipment, and comprises a pump body port ring and an impeller port ring, and an annular gap is formed between the two; a nozzle-shaped first groove is arranged on the inner circumferential surface of the pump body port ring, and a second groove with an inclined wall surface and a backflow channel is arranged on the outer circumferential surface of the impeller port ring; the first groove and the second groove are connected to form a fluid oscillation channel. Through the matching design of the circumferential interval of the groove and the rotating speed of the impeller, the groove connection-separation frequency reaches the ultrasonic frequency band, and double coupling of fluid self-excitation oscillation and ultrasonic vibration is realized. The application effectively prevents salt deposition under the premise of not changing the existing lubrication mode, and significantly improves the water film lubrication performance and the service life of the equipment.

A self-excited oscillation type dynamic nuclear polarization magnetic sensor, the sensor includes: a high-frequency oscillator, which generates a frequency-adjustable radio frequency signal and acts on a probe; a probe, which outputs a sine wave signal with a variable amplitude; a differential amplifier, which amplifies the sine wave signal output by the probe; and a low-frequency feedback coil, which generates a rotating magnetic field under the action of the signal output by the differential amplifier. A frequency meter, which receives the output voltage signal of the differential amplifier and measures the frequency of the output voltage signal. The self-excited oscillation type dynamic nuclear polarization magnetic sensor of the present invention can continuously output a sine wave signal whose frequency is proportional to the measured magnetic field, and has the advantages of continuous magnetic field measurement, high accuracy, sensitivity and simple structure.

The invention relates to an induction hob device (10) comprising at least one heating inductor (12, 14, 16, 18) and comprising a detection unit (20) which has at least one self-oscillating oscillator circuit (22) which is provided, in a detection mode, to measure properties of an induction load of the heating inductor (12, 14, 16, 18), and which has a single transistor (24), a feedback network (26), an induction coil (28) and a resistive voltage divider (30), wherein the transistor (24) is connected in common base, wherein the heating inductor (12, 14, 16, 18), in the detection mode, is part of the feedback network (26), wherein the induction coil (28) is connected to a collector terminal (32) of the transistor (24), wherein a base terminal (34) of the transistor (24) is connected to the resistive voltage divider (30) in order to set a direct current operating point of the transistor (24) to a value between 0 V and a supply voltage of the oscillator circuit (22), wherein the oscillator circuit (22) has an electric resistor (38) and a capacitor (40) which are each electrically connected in series to the base terminal (34) of the transistor and are provided to set a base impedance during the alternating current mode in order to ensure an oscillation for a wide range of induction loads.

This invention relates to a ball-operated plugging device for downhole pulsating hydraulic fracturing, comprising a main body assembly. A conical valve seat is disposed in the middle of the main body assembly, and an umbrella-shaped valve is slidably connected within the conical valve seat. The umbrella-shaped valve includes a valve head boss and a valve stem. A self-excited oscillation chamber is also provided at the bottom of the conical valve seat. A spring support seat is disposed below the self-excited oscillation chamber, with a central circular hole at the geometric center of the spring support seat. A spring is placed on the spring support seat, and the top of the spring contacts the valve head boss of the umbrella-shaped valve. A through-hole flow channel is provided in the middle of the umbrella-shaped valve, with its upper and lower ends communicating with cavity A and cavity B, respectively. The valve stem of the umbrella-shaped valve passes through the spring, and its bottom is inserted into the central circular hole of the spring support seat. A spherical groove is provided at the top of the umbrella-shaped valve for placing a soluble plugging ball. This invention can adjust the pressure variation of the pulsating fluid at the bottom of the well during construction.

The application discloses a kind of digital frequency tracking and synchronous sampling control system for resonant gyro, including self-excitation oscillation and automatic gain control device, preamplifier circuit and digital signal processor, digital signal processor includes first A / D conversion unit, second A / D conversion unit, frequency error detection unit FD, phase error detection unit PD, digital control oscillator NCO, sampling frequency generator and quadrature demodulation unit, the vibration signal of drive channel is handled after device output to first A / D conversion unit, conversion obtains the vibration signal after conversion, FD obtains frequency difference by frequency error detection, PD obtains phase difference by phase error detection, NCO is adjusted the frequency and phase of sampling frequency generator according to frequency difference and phase difference in real time, until the resonant frequency and phase of drive channel are tracked;The vibration signal of detection channel is handled after circuit output to second A / D conversion unit, obtains the vibration signal after conversion, and quadrature demodulation unit carries out quadrature demodulation and obtains speed signal.

The invention discloses a self-excited oscillation filtration coal powder system used in the coalbed methane mining process, the system comprises: an outer cylinder seat, an end cover, a spring assembly, a filter assembly, an oscillation sheet, a water inlet pipe, a water outlet pipe and a sand pump; the outer cylinder seat is a cylindrical body with a chamber provided therein, and a hole is opened at the center of the bottom; the upper pipe opening of the water inlet pipe extends upward from the hole at the bottom of the outer cylinder seat into the inner cavity of the outer cylinder seat; the lower pipe opening of the water inlet pipe is downwardly connected to the coalbed methane mining well; the end cover sealing cover is closed at the upper end of the outer cylinder seat; the center of the end cover is provided with an air outlet connected to an external coalbed methane gas production pipeline; the end cover, the spring assembly, the filter assembly and the oscillation sheet are connected in sequence from top to bottom; the filter assembly surrounds the air outlet; the oscillation sheet is suspended directly above the pipe opening of the water inlet pipe; a water outlet is provided at the bottom of the outer cylinder seat; and the sand pump is connected to the water outlet through the water outlet pipe. The invention effectively separates coalbed methane from coal powder, and the coalbed methane and coal powder are collected separately, thereby improving the extraction efficiency.

This invention relates to the field of flow battery technology and discloses a method and system for regulating self-excited oscillation in flow batteries. By integrating a flow oscillation generator into the electrolyte circulation loop of the flow battery, the periodic vortex ring oscillation and acoustic-fluid positive feedback phenomenon generated by the flow within the resonant cavity of this device are utilized to achieve pulsating regulation of electrolyte flow rate and pressure. This fundamentally improves the convective mass transfer efficiency at the electrode / electrolyte / diaphragm interface within the flow battery stack, thereby alleviating concentration polarization at the battery reaction interface caused by factors such as uneven flow rate, thickened diffusion boundary layer, and restricted ion migration. Furthermore, this device eliminates the need for long-term, additional electrical drive and complex control components, exhibiting a simple structure and stable operation.

A high-precision dual-mode self-excited oscillator. A self-excited oscillator (FRO) includes a reference current generator, a current converter, and a first oscillator core and a second oscillator core. The reference current generator generates a first current. The current converter generates a second current based on the first current. The first oscillator core generates a clock signal of a first frequency based on a first value of the second current. The second oscillator core generates a clock signal of a second frequency based on a second value of the second current. The second frequency may be lower than the first frequency, and the second value of the second current is lower than the first value of the second current.

The present invention discloses a method and structure for suppressing high-order mode oscillations in a multi-beam klystron. The present invention belongs to the technical field of vacuum electronic devices. The method proposed in the present invention adds a mode filter structure to the inner wall of the coaxial resonator of the multi-beam klystron. Its length is equal to half of the wavelength of the operating mode and is close to three-quarters of the wavelength of the high-order mode. Based on the principle of half-wavelength repeatability, this structure has the characteristic of having little influence on the frequency of the operating mode. Based on the principle of quarter-wavelength impedance transformation, this structure has the characteristic of having a greater influence on the high-order mode. By optimizing the design of the dimensions of the mode filter structure, it is possible to suppress spurious modes and eliminate the influence of high-order mode self-excited oscillations without affecting the frequency, field magnitude, and symmetry of the operating mode of the multi-beam klystron, providing technical support for the simulation design and engineering tube manufacturing of the multi-beam klystron.