249 results about "Amplitude control" patented technology

The invention discloses a multi-stage collaborative protection simulation verification method for a subway power supply system, and the method comprises the steps: building an integrated simulation model which comprises an automatic reclosing switch, a spare power automatic switching switch and an automatic change-over switch based on an MATLAB / Simulink platform, and especially carrying out the precise modeling of an advanced compensation function of ATSE. The model is verified by a power-off test, a simulation result and actually measured data are highly consistent in voltage recovery time, an error of advanced compensation action time of ATSE is less than 2ms, and dynamic characteristics of an actual system are accurately reproduced. Model simulation shows that the advanced compensation strategy of the ATSE can effectively control the voltage sag amplitude within 15%, the power supply reliability of the system is remarkably improved, and through strict'simulation-actual measurement 'double-track verification, the model accurately reproduces the dynamic characteristics of the actual system, and shows remarkable advantages in the aspect of improving the power supply reliability.

The invention relates to the technical field of cooling system control, in particular to a ship central cooling water system frequency conversion control simulation analysis system, which comprises a dynamic load prediction module for predicting cooling load requirements of ship main engine and auxiliary engine equipment in different time periods in the future in real time; the load grading control module is used for dividing loads into a plurality of grades, including light load grades, medium load grades and heavy load grades, and generating multi-layer frequency conversion control strategies for cooling water requirements under different load grades; the amplitude control module optimizes the variation amplitude of the rotating speed of the water pump; the load peak value regulation and control module is used for carrying out short-time overclocking control on the water pump when the load fluctuates violently within a short time; and the load distribution simulation module is used for simulating behaviors and responses of the cooling system under different load conditions by performing simulation analysis on distribution of loads of all cooling loops in the ship cooling water system. According to the invention, it is ensured that the equipment obtains sufficient cooling support under a high-load condition, and the load adaptive capacity and the operation efficiency of the cooling system are effectively improved.

The invention provides a segmented adaptive gain-based short-wave band amplitude and phase control device and method, and relates to the field of short-wave intelligent control. The method comprises the following steps: performing coupling detection processing on N paths of input short-wave signals to obtain coupled short-wave signals and power values of the coupled short-wave signals; based on the coupled short-wave signal and the power value of the coupled short-wave signal, calculating adjustment parameters through a preset adaptive segmented multi-target differential evolution algorithm, wherein the adjustment parameters comprise a frequency correction parameter, a phase adjustment parameter and an amplitude control voltage; adjusting the coupled short-wave signal based on the adjustment parameter to obtain a target short-wave signal; and detecting whether the target short wave signal meets a preset output condition, and if the target short wave signal meets the preset output condition, coupling the target short wave signal to output a radio frequency output signal. Through the scheme, the communication quality is improved.

The invention discloses a photovoltaic network construction control method and device based on voltage amplitude self-adaptive regulation and control. The method comprises the following steps: acquiring an intermediate-stage direct-current voltage in a working process of a photovoltaic panel; the DC / DC module operates in an MPPT tracking mode when the intermediate-stage DC voltage is lower than a set threshold value, and is switched to a constant-voltage mode when the intermediate-stage DC voltage is lower than the set threshold value to limit photovoltaic output; and the DC / AC module adopts a modification droop control method based on voltage amplitude self-adaptive regulation and control, an amplitude control item is introduced in amplitude control, and the output amplitude of the DC / AC module is adjusted in real time according to the intermediate-stage DC voltage deviation, so that the photovoltaic converter can adaptively adjust the output voltage amplitude. According to the invention, when the photovoltaic output of the photovoltaic converter is sufficient, the AC voltage is independently constructed, and the network construction control is realized; and when the photovoltaic output is insufficient and cannot meet the load demand, the photovoltaic converter adaptively adjusts the amplitude of the output voltage and stabilizes the frequency of the output voltage at the same time.

The invention discloses a low-sidelobe antenna based on double-metasurface amplitude and phase independent regulation and control. The antenna structure comprises a metasurface 1 and a metasurface 2. The metasurface 1 and the metasurface 2 comprise a plurality of metasurface units; the metasurface 1 is a phase modulation plane, comprises a phase regulation and control unit and is decoupled with the amplitude control function of the amplitude filtering plane; the metasurface 2 is an amplitude filtering plane and comprises an amplitude regulation and control unit, and the modulation process is decoupled from phase regulation and control of the metasurface 1; the phase regulation and control unit and the amplitude regulation and control unit comprise three metal layers and two dielectric layers; the first layer, the third layer and the fifth layer from bottom to top are metal layers, and the second layer and the fourth layer are dielectric layers. Through the design of the double-layer metasurface structure, completely independent operation of the phase regulation and control layer and the amplitude modulation layer is achieved, the technical contradiction that amplitude and phase parameters in a traditional single-layer metasurface are mutually restrained is avoided, and the core technical problem that the side lobe level of a transmission antenna is too high is solved cooperatively.

The utility model provides a heading machine. The heading machine comprises a machine body; the first rotating part is arranged at the front end of the machine body; the cutting assembly is connected with the first rotating part and can swing up and down under the action of the first rotating part; the first detection assembly is connected with the first rotating part and is used for detecting the lifting amplitude of the cutting assembly; the control assembly is connected with the first detection assembly and used for determining the final lifting amplitude of the cutting assembly according to the detection result of the first detection assembly; wherein the first detection assembly comprises a first gear which is connected with the first rotating part and can synchronously rotate along with the first rotating part; the second gear is meshed with the first gear; the first angle sensor is connected with the second gear and used for converting the rotation angle of the second gear into an electric signal and sending the electric signal to the control assembly. The heading machine can stably measure the lifting amplitude of the cutting assembly of the heading machine with high precision.

The invention discloses a terahertz phase shifter chip based on a magnetic coupling line fine adjustment technology, the magnetic coupling line fine adjustment technology is applied to a magnetic coupling line distributed attenuator, and a magnetic coupling line is added below a transmission line of the magnetic coupling line distributed attenuator. And a switching transistor array and a capacitive compensation transistor are respectively added at two ends of the magnetic coupling line. A vector synthesis type structure is adopted, the magnetic coupling line fine adjustment technology is innovatively provided and applied to the magnetic coupling line distributed attenuator, compared with a traditional distributed attenuator, the magnetic coupling line distributed attenuator has the advantages of being higher in precision and smaller in attenuation stepping, the occupied area is the same, the phase shifting control function of the phase shifter is achieved based on the attenuator, and the application range is wide. Finally, the phase of an output signal is controlled to realize a phase control function of 5.625-degree phase shift stepping in a full 360-degree range, and an amplitude control function in a 3dB range can be realized.

The present application relates to the technical field of data processing. Disclosed are a multi-nuclear imaging radio frequency power amplifier and a multi-nuclear magnetic resonance imaging hardware system. The multi-nuclear imaging radio frequency power amplifier comprises: a radio frequency signal input end, a radio frequency switch, a pre-compensation circuit, a voltage-controlled attenuator, a voltage-controlled phase shifter, a broadband radio frequency power amplifier, a broadband directional coupler and a radio frequency signal output end; a first output abnormality protection control circuit; a second output abnormality protection control circuit; an amplitude control circuit; and a phase control circuit. By means of the multi-nuclear imaging radio frequency power amplifier in the present invention, nonlinear correction can be performed on the amplitude and phase of a broadband radio frequency power amplifier, such that the broadband radio frequency power amplifier keeps meeting the requirements for high linearity and high power at an operating frequency point of a corresponding nuclide, so as to ensure the linear relationship between input and output signals of a radio frequency power amplifier and adequate signal strength, thereby avoiding the generation of artifacts due to signal distortion, and ensuring the accuracy and clarity of magnetic resonance imaging.

The invention discloses a terahertz metasurface capable of realizing independent control of amplitude and phase. The terahertz metasurface comprises a terahertz transparent substrate; the metasurface unit array is periodically arranged in a first direction, and each metasurface unit comprises a first structural layer which is of a dielectric resonance structure and is used for providing a phase regulation and control function; the second structural layer is a thin film formed by an adjustable absorption material and is used for providing an amplitude regulation and control function; the second structure layer is provided with an independent electrode for adjusting the transmission amplitude; a first dielectric isolation layer is arranged between the terahertz transparent substrate and the first structure layer and is used for reducing an electromagnetic coupling effect; the first structural layer and the second structural layer are stacked in the vertical direction through a three-dimensional processing technology, a second dielectric isolation layer is arranged between the first structural layer and the second structural layer, and the second dielectric isolation layer is a silicon dioxide SiO2 or silicon nitride Si3N4 film with the thickness D ranging from 100nm to 1000nm.

The invention discloses a crane falling and amplitude variation control method and device, electronic equipment and a storage medium. The crane falling and amplitude changing control method comprises the steps that current working condition information of a crane is obtained; on the basis of a pre-generated four-dimensional feed-forward control model, a feed-forward control current value is calculated according to the current working condition information, and the four-dimensional feed-forward control model represents the mapping relation between the working condition information and the main arm descending valve control current of the crane in the constant-speed descending state; the actual descending speed of the main arm of the crane is obtained and compared with the set expected descending speed, and a closed-loop correction current value is calculated through a closed-loop control algorithm based on the speed error; and superposing the feedforward control current value and the closed-loop correction current value to obtain a total control current, and outputting the total control current to a main arm descending valve of the crane so as to control the descending speed of the main arm of the crane. According to the invention, the descending process of the main arm is stable and constant in speed, and the stability and safety of the hydraulic control crane in the amplitude variation action are improved.

A high-gain automatic phase modulation quartz vibrating beam accelerometer control circuit comprises a feed-through suppression module, the feed-through suppression module and a quartz vibrating beam resonator form a parallel resonance unit, and the output of the parallel resonance unit is connected with the input of a front-end amplification module. The output of the front-end amplification module is connected with the input of the high-pass filtering module and the first input of the automatic phase control module, the output of the high-pass filtering module is connected with the first input of the dynamic phase shift module, and the second input of the dynamic phase shift module is connected with the output of the automatic phase control module. The output of the dynamic phase shift module is connected with the input of the differential driving module through the low-pass filtering module, the square wave shaping module and the amplitude control module; the output of the differential driving module is connected with the input of the feed-through suppression module, the driving end of the quartz vibrating beam resonator and the second input of the automatic phase control module; according to the invention, low-noise driving of the high-impedance quartz vibrating beam is realized, and the loop phase error is dynamically compensated to improve the stability and resolution of the accelerometer.

The invention discloses a modularized microwave signal source, which belongs to the technical field of microwave communication and comprises a radio frequency front-end module, a lower variable intermediate frequency and mixing filter module, an upper variable intermediate frequency and mixing filter module, an amplitude control module and a power supply control board for supplying power to and controlling the modules in a distributed manner, each module is arranged in an independent cavity with an electromagnetic shielding structure; the modular microwave signal source adopts a secondary mixing superheterodyne scheme as a basic microwave link, and adopts a primary mixing scheme as a millimeter wave extension link. The modularized microwave signal source is divided into a plurality of standardized modules which can be independently detached and have subdivided functions, so that the problems of difficulty in maintenance, fixed design and high cost of a traditional high-integration-level microwave component are solved, and the high performance, high maintainability, strong reusability and wide-frequency-band coverage effect of the microwave signal source are realized.

The invention provides a fast differential frame synchronization method under a burst transmission system, which comprises the following steps: a receiver reduces the sampling rate of a burst transmission sequence to four times of a symbol rate, detects the timing error of a down-sampling sequence, calculates an integer parameter and a fraction parameter based on a timing error result, and performs frame synchronization according to the integer parameter and the fraction parameter; then, a cubic interpolation filter is used for calibrating timing errors and recovering a correct data sequence, a differential frame synchronization method which is insensitive to signal amplitude and suitable for any phase deviation is used for searching a frame header position, and whether the size of a correlation peak value is larger than a set threshold value or not is judged; if yes, timing synchronization and frame synchronization are completed; and if not, returning to continue to calculate the timing error. The method is suitable for a burst transmission system, is different from a traditional frame synchronization method, does not need to carry out frequency difference estimation, amplitude control and carrier synchronization in advance, and can quickly realize timing synchronization and frame synchronization, so that the synchronization time is shortened.

The invention discloses an ultrasonic energy adjusting device, an ultrasonic energy adjusting method and ultrasonic treatment equipment. The ultrasonic energy adjusting device comprises an adjusting control circuit, a voltage-controlled direct-current power supply circuit and an inverter output circuit, the adjusting control circuit is used for acquiring a target amplitude signal, a target frequency signal, a target period signal and a target duty ratio signal, and outputting an amplitude control signal to the voltage-controlled direct-current power supply circuit according to the target amplitude signal; a driving control signal is output to the inversion output circuit according to the target frequency signal, the target period signal and the target duty ratio signal; the voltage-controlled direct-current power supply circuit is used for generating a direct-current voltage signal output to the inversion output circuit according to the amplitude control signal; the inverter output circuit is used for generating an ultrasonic driving signal output to the ultrasonic transducer according to the direct-current voltage signal and the driving control signal so as to control the amplitude, frequency, period and duty ratio of ultrasonic energy output by the ultrasonic transducer, and multi-dimensional fine control over the ultrasonic energy is achieved.

The invention provides a self-synchronizing voltage source string type photovoltaic inverter system and a control method. The self-synchronizing voltage source string type photovoltaic inverter system comprises an internal potential frequency control module, a power angle rapid adjustment control module, an internal potential amplitude control module, a dual-mode parallel-competitive dominant control module, a bridge arm modulation voltage control module and an internal potential amplitude limiting control module. The dual-mode parallel-competitive dominant control module is respectively connected with the internal potential frequency control module, the power angle rapid adjustment control module and the bridge arm modulation voltage control module; the bridge arm modulation voltage control module is connected with the internal potential amplitude limiting control module; and the internal potential amplitude limiting control module is connected with the internal potential amplitude control module. According to the invention, seamless smooth switching between a limited power working mode and a maximum power tracking working mode is realized, so that self-synchronizing voltage source control of the string type photovoltaic inverter is realized in a full operation mode.

The invention discloses a multi-channel high-isolation low-power-consumption array receiving module. A power supply and control circuit is connected with a local oscillator amplification power division circuit; the power supply and control circuit is used for converting an externally accessed power supply into a power supply voltage required by the receiving module, and controlling the receiving frequency conversion circuit through an external control instruction to realize the functions of amplitude control, band-pass filter group switching, polarization selection and the like; the receiving frequency conversion circuit comprises a plurality of receiving frequency conversion links, and each receiving frequency conversion link receives the first local oscillator signal and the second local oscillator signal sent by the local oscillator amplification power division circuit and is used for converting a radio frequency signal input into the receiving frequency conversion link into an intermediate frequency signal to be output; the local oscillator amplification power division circuit is used for dividing the local oscillator signal into a first local oscillator signal and a second local oscillator signal, and inputting the first local oscillator signal and the second local oscillator signal into the receiving frequency conversion link. The circuit has the advantages of high circuit integration degree, small size, compact structure, excellent performance, high reliability and the like.

The invention discloses an antenna control method, system and device and a computer readable storage medium, and relates to the technical field of communication, and the method comprises the steps: obtaining a target position of a terminal device; generating mechanical platform control information and beam forming control information according to the target position; performing angle control on the mechanical platform according to the mechanical platform control information; performing angle control on the beam forming chip according to the beam forming control information; wherein the mechanical platform is used for carrying out horizontal rotation and / or pitching rotation on the antenna array; and the beam forming chip is used for performing phase control and / or amplitude control on the antenna array. According to the invention, large-range coarse adjustment of the horizontal angle and / or the pitching angle of the antenna array can be carried out by means of the mechanical platform, and small-range fine adjustment of the antenna array can be carried out by means of the beam forming chip, so that the antenna array can flexibly send beams to the terminal equipment, the beam width limitation of a small-size array is broken through, and the antenna array can be flexibly and accurately adjusted. And the signal quality of the terminal equipment is improved.

The invention discloses an amplitude auxiliary maintaining method and device for a hemispherical resonator gyro and the hemispherical resonator gyro, and the amplitude auxiliary maintaining method comprises the following steps: setting the voltage of all electrodes of the hemispherical resonator gyro to be 0, and after the hemispherical resonator gyro starts oscillation, starting the hemispherical resonator gyro; the output of an amplitude control loop of the hemispherical resonator gyroscope is converted into an alternating current signal, then the alternating current signal is switched to a high-voltage electrode of the hemispherical resonator gyroscope, and meanwhile, a direct current signal applied to the high-voltage electrode is kept unchanged. The high-voltage electrode is reused as the annular electrode to assist in maintaining the amplitude of the hemispherical resonator gyroscope, the circuit improvement structure is simple, and software can be compatible with a traditional control algorithm.

Provided is a wireless power transmitting system and device, the wireless power transmitting device including: a signal generator configured to generate an initial signal; a controller configured to output an amplitude control signal and a phase control signal; a phase modulator configured to generate a phase-modulated signal by modulating a phase of the initial signal based on the phase control signal; a power amplifier configured to generate a power signal by amplifying the phase-modulated signal; a voltage converter configured to control a magnitude of a power voltage of the power amplifier based on the amplitude control signal; and an antenna configured to externally output the power signal.

The application provides an AM-PM distortion calibration method applied to an UWB transmitter and belongs to the field of UWB communication. The method adds a sampling resistor between a linear voltage stabilizing power supply LDO and a digital power amplifier DPA driving stage of the UWB transmitter using a digital power amplifier, so as to simulate the instantaneous change of the power supply voltage of the DPA driving stage when the UWB pulse is transmitted; an adjustable delay unit is added between a carrier input port LO and the DPA driving stage; the continuous sine wave is transmitted, the phase information under each digital baseband amplitude control word is collected to form original data of the AM-PM distortion of the UWB transmitter, the digital baseband output AM-PM control word is used to control the adjustable delay unit to output the phase which is opposite to the original data and has the same size, so that the phase predistortion of the transmitted UWB pulse is realized, and the AM-PM distortion calibration is completed. The application has the advantages of simple implementation and strong compensation capacity.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a network entity, an indication of an amplitude control capability of the UE for beamforming. The UE may perform, to the network entity, the beamforming based at least in part on an amplitude control limitation of the amplitude control capability. Numerous other aspects are described.

The present application relates to the field of GTAW welding, and is a GTAW longitudinal swing wire feeding intelligent control system and method based on magnetic control. In view of the problems of the wire end deviating from the tungsten electrode and the unstable droplet transfer in the GTAW longitudinal swing wire feeding welding, a GTAW longitudinal swing wire feeding intelligent control system and method based on magnetic control is proposed. The relative position of the wire end and the tungsten electrode is controlled by using a visual sensing-based wire end and tungsten electrode relative position adaptive calibration method; the longitudinal swing amplitude of the GTAW wire is controlled by using a magnetic field-based GTAW wire longitudinal swing amplitude control method; the longitudinal swing frequency of the GTAW wire is controlled by using a magnetic field-based GTAW wire longitudinal swing frequency control method; and the wire feeding speed is controlled by using a wire sensing-based wire feeding speed control method.

The present invention relates to the field of gyroscope control and detection technology, and in particular to a method, system and device for measuring the angular velocity of a hemispherical resonant gyroscope. A control model of a hemispherical resonant gyroscope is established; the gyroscope is stationary on a test plane, a control voltage is applied to an excitation electrode, and the output of the gyroscope is measured to make it in a normal working state; a control force is applied to the angle control loop of the hemispherical resonant gyroscope to make the vibration mode angular periodic motion, and the hemispherical resonant gyroscope is in a rotational modulation state; a disturbance is applied to the amplitude control loop according to a force scale model to obtain a real-time force scale estimate; based on the real-time force scale estimate, a real-time external angular velocity input is obtained. The present invention detects the force scale of the relevant control loop in real time, eliminates the applied angular velocity input, and can then track external angle changes, thereby achieving the technical effect of improving the accuracy of the resonant gyroscope.

The present invention provides a signal multipath effect simulation system, which includes a radio frequency signal generator, a power splitter, a plurality of signal simulation devices, a power combiner, and a signal receiver. Each signal simulation device is used to simulate signals with different time delays. The signal simulation device includes an amplitude controller and a single-signal simulator connected in transmission. The amplitude controller is used to control the amplitude of the signal. The single-signal simulator includes a time delay control board, a waveguide transmission structure, and a radio frequency switch. The waveguide transmission structure includes a plurality of transmission paths with different lengths. The radio frequency switch is used to selectively conduct each transmission path. The radio frequency switch and at least some of the transmission paths are both arranged on the time delay control board. The signal multipath effect simulation system provided by the present invention can, through the coordinated operation of a plurality of single-channel simulators, simulate the multipath effect in a complex channel environment in real time and accurately, and provide high-precision channel characteristic simulation.

The invention discloses a tubular column lifting amplitude control device and method based on wellhead pressure changes, and belongs to the technical field of automatic well repair of oil production engineering. The tubular column lifting amplitude control device comprises a derrick, a blowout preventer, a well pressure monitoring device, a fixed slip, a movable slip, a lifting system and a control system; a well pressure monitoring device for monitoring pressure changes of a well mouth casing pipe in real time is arranged on a blowout preventer of a well mouth, a derrick is erected around the well mouth, the derrick is provided with an upper cross beam and a lower cross beam, the lower cross beam is provided with a fixed slip used for clamping a pipe column, the upper cross beam is provided with a lifting system, and the lifting system is provided with a movable slip used for clamping the pipe column. The well pressure monitoring device is connected with the control system, the lifting system is connected with the control system, the wellhead pressure is monitored in real time, the needed lifting amplitude and speed are automatically calculated through a remote PLC program, and the lifting amplitude and speed of a tubular column are controlled. The operation reliability is improved, potential safety hazards caused by human factors are eliminated, and pipe column bending accidents are reduced.

The digital jitter drive control circuit and working method of the laser gyro lock area are closer to the ideal linear output, fast start-up and jitter recovery, high frequency tracking accuracy, and the jitter amplitude is large enough and stable, which improves the measurement accuracy of the gyro in a variable temperature environment. The circuit includes a jitter drive control circuit, a jitter drive circuit, a jitter mechanism, a resonant cavity, and a signal shaping circuit through which the signal passes in sequence; the jitter drive control circuit includes: an amplitude control loop, a frequency control loop, and a pulse width control circuit; the mechanical jitter frequency deviation is obtained by quadruple frequency phase counting, and the amplitude control loop extracts the mechanical jitter frequency deviation and obtains the real-time mechanical jitter amplitude; the frequency control loop extracts the mechanical jitter frequency and calculates the real-time mechanical jitter frequency according to the frequency feedback signal; the pulse width control circuit compares the mechanical jitter amplitude and the real-time mechanical jitter frequency as reference objects, calculates the error according to the mechanical jitter amplitude benchmark, and then performs real-time control to compensate for the change.

The invention relates to the technical field of grounding, and discloses an anti-vibration and anti-damage grounding suspension device for a transformer substation, the anti-vibration and anti-damage grounding suspension device comprises a U-shaped hook and movable openings formed in the two sides of the hook, clamping jaws are hinged in the two movable openings of the hook, and a torsion spring is mounted on a connecting shaft of the clamping jaws, so that the two clamping jaws clamp a cable towards the inner side together; and the inner side of the hook is provided with an elastic component which is in contact with the cable, so that the cable is in contact with the elastic component under the locking of the two clamping jaws, and the vibration of the cable and the damage to the cable can be avoided. The elastic component is of a composite structure, the elastic layer absorbs most vibration impact force through compression and resilience, the elastic metal assists in dispersing stress, and fatigue damage of the cable due to high-frequency vibration is avoided; the upper and lower clamping structures cooperate with the clamping force of the torsion spring, the vibration displacement amplitude of the cable is controlled within a small range, collision with peripheral equipment is prevented, and the fault risk is reduced.

This invention discloses a stable amplitude control system for a high-Q MEMS resonator. This system is a digital closed-loop drive system based on a field programmable gate array (FPGA) as the control platform and DDS-PLL technology as the control scheme. The system uses a digital phase-locked loop (DPS) algorithm for frequency synthesis to track the gyroscope's vibration resonant frequency and phase. This structure utilizes the DDS algorithm to provide a high-resolution frequency signal, ensuring sufficiently small frequency steps. The PLL's bandpass characteristics also effectively suppress some spurious signals in the DDS output spectrum, achieving the complementary advantages of DDS and PLL. This improves the dynamic performance of the high-Q MEMS resonator control system, optimizes the stability accuracy of the MEMS gyroscope's amplitude and frequency, and further enhances the MEMS gyroscope's zero-bias output and anti-interference capabilities.

The application discloses a multi-octave wideband frequency conversion assembly, which comprises a frequency conversion circuit, an amplitude control circuit and a switch filter set, wherein the frequency conversion circuit expands the input radio frequency to an intermediate frequency signal through two local oscillator frequency points for the input radio frequency signal and outputs the intermediate frequency signal to the amplitude control circuit; the amplitude control circuit adjusts the amplitude of the intermediate frequency signal output by the frequency conversion circuit; the switch filter set filters the signal output by the amplitude control circuit through a multi-path filter set, filters out harmonics and stray signals, and performs amplitude correction to obtain a multi-octave intermediate frequency output signal. The 3-4GHz signal is expanded to a ten-octave signal of 0.2-2GHz which can be directly processed by a digital circuit through the two local oscillator frequency points of 4 / 5GHz, the output power reaches 10dBm, the harmonic suppression reaches more than 48dBc, the power flatness reaches ±1dB, the dynamic range reaches more than 60dB, and the step is only 0.25dB.

The invention relates to the technical field of household appliances, in particular to an air conditioner which comprises a refrigerant circulation loop, an exhaust temperature sensor and a controller, and the controller firstly obtains the exhaust temperature of a compressor monitored by the exhaust temperature sensor and determines the temperature change rate of the exhaust temperature based on the exhaust temperature; when it is determined that the frequency reduction condition is met according to the exhaust temperature and the temperature change rate, the controller determines the frequency reduction amplitude and controls the compressor to operate in a frequency reduction mode according to the frequency reduction amplitude; or, when it is determined that the frequency increasing condition is met according to the exhaust temperature and the temperature change rate, the controller determines the frequency increasing amplitude and controls the compressor to operate in a frequency increasing mode according to the frequency increasing amplitude; the temperature change rate is introduced to serve as control input, the current exhaust temperature and the change trend of the current exhaust temperature are concerned, and therefore the frequency of the compressor can be accurately and timely adjusted, the problem of frequency oscillation of the compressor caused by exhaust temperature detection and control lag is effectively solved, and more stable, efficient and reliable operation of the air conditioner is achieved.