26 results about "Electronic oscillator" patented technology

An electronic oscillator circuit includes: a resonant circuit including an inductor and a capacitor, where each of the inductor and the capacitor has a first terminal connected to a first side of the resonant circuit and a second terminal connected to a second side of the resonant circuit; a first current controller; and a second current controller; wherein the first current controller is connected to a first side of the resonant circuit; wherein the second current controller is connected to a second side of the resonant circuit; wherein the first current controller is arranged to enable it to act as a current source of the resonant circuit; wherein the second current controller is arranged to enable it to act as a current tank of the resonant circuit; wherein the first current controller and the second current controller are configured such that the injection current flows from the first current controller to the second current controller through the resonant circuit when the first current controller and the second current controller are in a first state; and when the first current controller and the second current controller are in the second state, no current is injected into the resonant circuit. The current injected in this manner allows energy to be injected into the resonant circuit, which forces oscillation in the resonant circuit to proceed at a predetermined frequency different from the natural resonant frequency of the resonant circuit.

Electronic oscillator with independent controls of variable capacitances The present description relates to an electronic oscillator (100) comprising a resonator (102) coupled in parallel to at least one active circuit (104), the resonator comprising two electrodes (110, 112) coupled to separate variable capacitances (116, 118) forming a load capacitance of the electronic oscillator, and a control device (148) configured to independently control the values ​​of the variable capacitances. Figure for abstract: Figure 1

A method for operating a fast start-up oscillator system, which includes a reference oscillator and a quartz oscillator connected to an electronic oscillator circuit, which is provided to supply a master clock signal to a start-up controller configured to perform a fast start-up procedure of the quartz oscillator via the reference oscillator. The start-up controller includes a calculation unit and a memory unit for storing data in connection with the reference oscillator for starting the quartz oscillator. The method includes parameterising the calculation unit for starting the quartz oscillator, generating excitation bursts, determining a phase deviation in different successive periods between the oscillation of the reference oscillator and the oscillation of the quartz oscillator, calculating a frequency error in the calculation unit, and correcting the frequency of the reference oscillator to the frequency of the quartz oscillator.

The present invention relates to a crystal oscillator and a startup operation method of a crystal oscillator, the crystal oscillator comprising: a crystal resonator comprising a first terminal and a second terminal, an electronic oscillator circuit connected to the crystal resonator, a first capacitor comprising a first terminal and a second terminal, the second terminal being connected to the first terminal of the crystal resonator, a second capacitor comprising a first terminal and a second terminal, the second terminal being connected to the second terminal of the crystal resonator, characterized in that the crystal oscillator further comprises a switch comprising a first terminal, a second terminal and a third terminal, wherein the conductivity between the first terminal and the second terminal of the switch is controlled by the voltage at the third terminal, the first terminal of the switch is connected to the first terminal of the first capacitor, and the second terminal of the switch is connected to the first terminal of the second capacitor.

An electronic oscillator circuit comprising: a tank circuit comprising an inductor and a capacitor, wherein the inductor and the capacitor each have a first terminal connected to a first side of the tank circuit and a second terminal connected to a second side of the tank circuit; a first current controller; and a second current controller; wherein the first current controller is connected to the first side of the tank circuit; wherein the second current controller is connected to the second side of the tank circuit; wherein the first current controller is arranged such that it can act as a current source for the tank circuit; wherein the second current controller is arranged such that it can act as a current sink for the tank circuit; wherein the first current controller and the second current controller are configured such that when the first current controller and the second current controller are in a first state, an injected current flows from the first current controller to the second current controller through the tank circuit; and when the first current controller and the second current controller are in a second state, no current is injected into the tank circuit. The injection of current in this way allows energy to be injected to the tank circuit, which forces oscillations in the tank circuit at a predetermined frequency different to the natural resonant frequency of the tank circuit.

The application provides a clock divider circuit, a phase synchronization method thereof and an electronic device. The clock divider circuit comprises: an electronic oscillator configured to generate a root clock signal of a first frequency; and a plurality of clock dividers connected to the electronic oscillator respectively, wherein the root clock signal is input into the plurality of clock dividers respectively, and the plurality of clock dividers are configured to generate a plurality of variable frequency clock signals of different frequencies according to the root clock signal of the first frequency and a preset variable frequency coefficient. In this scheme, the modification of the frequency division coefficient of one clock divider does not affect the clock signals of other clock dividers, and the phase synchronization between the clock signals can be maintained after frequency division, and the phase relationship is not lost due to the variable frequency process.

A single droop detector and an asynchronous frequency recovery circuit may be used to slow down a frequency asynchronously when a voltage droop is detected and exit the droop event synchronously by gradually changing an electronic oscillator buffer capacitance until the frequency has been fully restored. This combination of a single droop detector and an asynchronous frequency recovery circuit may provide reduced detection and response latency. This solution may also provide improved performance in the presence of multiple voltage droop events that occur before a frequency has been fully restored from the previous droop. This solution also reduces or eliminates frequency overshoots and secondary voltage droops.

The present description concerns an electronic oscillator comprising a resonator coupled in parallel to at least one active circuit, the resonator comprising two electrodes coupled to separate variable capacitive elements forming a charge capacitive element of the electronic oscillator, and a control device configured to independently control the values of the variable capacitive elements.

The invention belongs to the technical field of microwave photons, and provides a double-ring photoelectric oscillator with a stabilizing device and a stabilizing method thereof, the double-ring photoelectric oscillator is provided with a long ring, a short ring and a stabilizing device; the stabilizing device comprises a first piezoelectric ceramic optical fiber stretcher and a motor space light delay line; the radio frequency signal source generates a first optical probe signal and a second optical probe signal through modulation; the first optical probe signal is converted into a first electric probe signal after passing through the long ring; a second optical probe signal is converted into a second electric probe signal after passing through the short ring; the first frequency mixer and the second frequency mixer are used for performing homodyne frequency mixing on the electric probe signal and the radio frequency signal to generate a zero frequency error signal; and the two phase-locked loops generate compensation control signals according to the zero-frequency error signals. According to the invention, by outputting the control signal and adjusting the optical fiber delay line, the stability of two loops is ensured, the problem of combined signal frequency drift caused by neglecting short-loop delay change is solved, and the coherence requirement on two paths of optical signals is avoided by electric field combination.

Embodiments of the present disclosure relate to independently controlled electronic oscillators with variable capabilities. The present description relates to an electronic oscillator comprising: a resonator coupled in parallel to at least one active circuit, the resonator comprising two electrodes coupled to separate variable capacitance elements, the separate variable capacitance elements forming a charge capacitance element of the electronic oscillator; and a control device configured to independently control a value of the variable capacitance element.

To provide an apparatus and a method for external oscillator control and calibration.SOLUTION: In a particular embodiment, an electronic oscillator system includes a semiconductor die and a controllable oscillator external to the semiconductor die. The oscillation frequency of the controllable oscillator is adjusted by a first varactor and a second varactor. The semiconductor die includes a phase-locked loop (PLL) that provides fine tuning to the controllable oscillator by controlling the first varactor, and a calibration circuit that provides coarse tuning to the controllable oscillator by controlling the second varactor.SELECTED DRAWING: Figure 3A

An electronic percussion instrument device includes: a motion sensor sensing a current state of the electronic percussion instrument device and simultaneously generating angle values X, Y, Z based on Euler angles; the processing and operation unit is used for calculating sound frequencies corresponding to the angle values X, Y and Z according to the angle values X, Y and Z and the current state of the electronic percussion instrument device, and generating angle value variation deltaX, deltaY and deltaZ of the electronic percussion instrument device in a non-static state at a preset time interval; obtaining an elastic value K according to the angle value variations delta X, delta Y and delta Z through an elastic algorithm; the electronic oscillator is used for comparing the sound frequency corresponding to the current state with the sampling sound frequency stored in the sampling storage unit to obtain a simulation signal; the elastic value K passes through the filter to obtain a frequency signal with a specific bandwidth; and the sound output unit is used for integrating and converting the simulation signal and the frequency signal with the specific bandwidth to obtain simulation sound and outputting the simulation sound.

The utility model relates to the technical field of automobile brake calipers, and discloses an automobile brake caliper capable of reducing friction noise, which comprises a brake disc and a brake caliper body composed of pistons and brake pads, the number of the pistons is even, the pistons are arranged in the brake caliper body in pairs, and the pistons are controlled by a hydraulic oil circuit and can drive the brake pads to move. An electromagnetic generator is arranged between the piston and the brake pad, the electromagnetic generator can generate a magnetic field after being powered on, the electromagnetic generator is connected with an electronic oscillator and can change the direction of the magnetic field, and a ferromagnetic layer made of materials capable of being attracted by magnets is arranged in the middle of the brake disc. The ferromagnetic layer is located within the influence range of the magnetic field of the electromagnetic generator, electrons in the ferromagnetic layer are influenced by the magnetic field in the changing direction and are continuously rearranged to generate heat, the brake disc is preheated, stress is uniform in the braking process, and gaps are reduced.

An electronic oscillator circuit and a method for controlling an oscillation frequency of a ring oscillator circuit. The circuit includes a plurality of inverter stages each Including an inverter and a trans-resistance switch circuit configured to switch on the inverter during an operation of the electronic oscillator circuit thereby facilitating the inverter to generate an inverter output signal in response to an inverter input signal fed to the inverter; wherein the inverters in the plurality of the inverter stages are connected to form a ring oscillator circuit.

The present application relates to the field of microwave photonics, and more particularly to a high linearity microwave photonics down-conversion receiving system based on an optoelectronic oscillator. The system comprises a laser, a first phase modulator, a first optical amplifier, a phase-shifted Bragg grating, a first photodetector, a second phase modulator, an optical filter, a second optical amplifier, and a second photodetector. The frequency of the local oscillator signal generated by the first photodetector can be tuned by changing the frequency of the laser, thereby effectively realizing the tuning of the down-converted signal output by the second photodetector. By adjusting the gain value of the first optical amplifier, the amplitude of the local oscillator spectral harmonic in the output optical signal of the first phase modulator is a specific value, thereby realizing the suppression of the third-order intermodulation distortion in the output signal, and further improving the spurious-free dynamic range of the entire down-conversion receiving system. The system has reconfigurability and high linearity, and can play a technical value in the field of radar and communication applications.

A system is provided herein. The system includes an electro-optic modulated (EOM) comb generator including an opto-electronic oscillator (OEO) loop to modulate a continuous-wave seed source and form an EOM comb, a saturable absorber to perform non-linear pulse shaping of the EOM comb, and a tunable filter having resonances matching a frequency spacing of the EOM comb. The tunable filter filters the EOM comb from the saturable absorber to provide an output EOM comb.

The invention relates to the technical field of electronic oscillators, in particular to a CDR circuit capable of rapidly tracking a spread spectrum clock. Comprising an analog front end (AFE) used for carrying out equalization amplification on a reference clock signal, a baseband phase detector (BBPD) used for detecting a phase difference between the reference clock signal and a local clock signal CLK2 and generating a phase error signal, and a charge pump CPPL with a phase leading function and used for receiving the phase error signal and generating a control voltage VCTRL, the local clock oscillator ICO is used for providing a stable local clock signal CLK2 and feeding back the stable local clock signal CLK2 to the baseband phase detector BBPD, and the phase error signal is coupled to the control voltage VCTRL or the tuning voltage VRING of the input end of the local clock oscillator ICO through a capacitor C. The BBPD outputs a lead-lag signal, alternating current is coupled to a potential on the VCTRL, pre-charging and pre-discharging are formed, and the response capability is improved.

The application discloses a control method suitable for a dynamic coupling electronic oscillator network, comprising the following steps: S1, constructing a coupling oscillator network model describing the dynamic interaction relationship between electronic oscillators which are coupled with each other; S2, based on the constructed coupling oscillator network model, establishing a coupling oscillator state signal tracking error model of a nonlinear state; S3, constructing a dual-mode event-triggered distributed model predictive control strategy with input fluctuation suppression capability; and S4, verifying the recursive feasibility and system stability of the dual-mode event-triggered distributed model predictive control strategy. The control method suitable for the dynamic coupling electronic oscillator network can significantly improve the operation safety and robustness of the coupling oscillator network system and effectively suppress the fluctuation of the control input. By introducing a non-periodic event triggering mechanism, the triggering frequency of the controller is significantly reduced, and the system resource consumption is reduced.

The present description concerns an electronic oscillator comprising a resonator coupled in parallel to at least one active circuit, the resonator comprising two electrodes coupled to separate variable capacitive elements forming a charge capacitive element of the electronic oscillator, and a control device configured to independently control the values of the variable capacitive elements.

The invention discloses composite outer wall integrated lamination production equipment of an integrated house, and relates to the technical field of building wallboard manufacturing, the composite outer wall integrated lamination production equipment comprises a hydraulic cylinder and a lamination cabinet, the inner side wall of the lamination cabinet is slidably connected with a lamination mechanism, the lamination mechanism comprises a lamination assembly, and the lamination assembly comprises a protective shell and two hot pressing plates. According to the invention, the coil is arranged in the lamination assembly, the coil is connected with the power box through the electronic oscillator, and high-frequency alternating current is provided for the coil, so that a high-frequency alternating magnetic field is generated around the coil, the magnetic field generates induced eddy current on the hot press plates on the upper and lower surfaces, and the high-frequency alternating magnetic field enables the hot press plates to generate induced heat; the laminated board is in direct contact with the hot pressing board and conducts heat, induced current is located on the surface of a conductor of the hot pressing board under the action of the skin effect, generated induction heat is concentrated on the surface of the conductor, the problem of heating hysteresis in the laminating process of the laminated board is solved, and the quality of the formed composite wallboard is better.

In absence of electrical approaches for realization of highly stable RF oscillator, opto-electronic oscillators (OEO) techniques are provided, where self-forced oscillation techniques using long optical delays demonstrate significant short-term and long-term frequency stability. Fully integrated opto-electronic oscillator chip (IOEC) may be the most efficient realization of an RF frequency synthesizer in terms of operation frequency (covering microwave and millimeter wave), size (<10 cm3), ruggedness to environmental effects of temperature (−40 to 80 C), vibration (up to 40 g), low timing jitter (<5 fs for 40 GHz carrier), and wall-plug efficiency (output power >10 dBm from under 1 W power). A free-running III-V (primarily InP) based multi-mode laser (MML) diodes is designed with large mode number (e.g., over 60 modes) and intermodal oscillation frequency compatible with desired RF carrier signal (e.g., 1-40 GHz).

An electronic oscillator circuit and a method of controlling an oscillation frequency of a ring oscillator circuit. The circuit comprises a plurality of inverter stages, each inverter stage comprising an inverter and a transimpedance switching circuit configured to activate the inverter during operation of the electronic oscillator circuit, thereby enabling the inverter to generate an inverter output signal according to an inverter input signal input to the inverter; wherein the inverters in the plurality of inverter stages are connected together to form a ring oscillator circuit.

The invention relates to the technical field of switching power supplies, in particular to a switching power supply anti-interference circuit based on automatic control of an electronic oscillator, which comprises a filter rectifier module, a switching power supply module, a pulse signal generation module and a control and feedback module, the filtering and rectifying module is used for converting external alternating current into direct current; the switching power supply module provides stable 12V direct current power supply, the pulse signal generation module generates a 1 / 2Hz pulse signal, and the control and feedback module controls a working loop of a switching power supply, detects a dead halt state and triggers the pulse signal to restart. Usage of an underground mobile substation with higher power is not limited, the defect that the high-frequency characteristic of a switching power supply is not resistant to strong electromagnetic interference is overcome, and an important promotion effect on wide application of the switching power supply is achieved.

The invention discloses a control method suitable for a dynamic coupling electronic oscillator network. The control method comprises the following steps: S1, constructing a coupling oscillator network model for describing a dynamic interaction relationship between electronic oscillators of which voltage signals are mutually coupled; s2, based on the constructed coupled oscillator network model, establishing a coupled oscillator state signal tracking error model in a nonlinear state; s3, constructing a dual-mode event trigger type distributed model prediction control strategy with an input fluctuation suppression capability; and S4, verifying recursion feasibility and system stability of the dual-mode event trigger type distributed model predictive control strategy. According to the control method suitable for the dynamic coupling electronic oscillator network, the operation safety and robustness of a coupling oscillator network system can be remarkably improved, and fluctuation of control input is effectively restrained. By introducing a non-periodic event triggering mechanism, the triggering frequency of the controller is remarkably reduced, and the system resource consumption is reduced.

An electronic oscillator circuit comprising: a tank circuit comprising an inductor and a capacitor, wherein the inductor and the capacitor each have a first terminal connected to a first side of the tank circuit and a second terminal connected to a second side of the tank circuit; a first current controller; and a second current controller; wherein the first current controller is connected to the first side of the tank circuit; wherein the second current controller is connected to the second side of the tank circuit; wherein the first current controller is arranged such that it can act as a current source for the tank circuit; wherein the second current controller is arranged such that it can act as a current sink for the tank circuit; wherein the first current controller and the second current controller are configured such that when the first current controller and the second current controller are in a first state, an injected current flows from the first current controller to the second current controller through the tank circuit; and when the first current controller and the second current controller are in a second state, no current is injected into the tank circuit. The injection of current in this way allows energy to be injected to the tank circuit, which forces oscillations in the tank circuit at a predetermined frequency different to the natural resonant frequency of the tank circuit.

The utility model relates to the technical field of electronic oscillators, in particular to an electronic oscillator with a protection function, which comprises an oscillator body, telescopic grooves are arranged at four corners of two sides of the oscillator body, supports are movably mounted in the four telescopic grooves, and ends of the supports on two sides are fixedly connected through clamping strips. The oscillator body, the support, the clamping strips, the protection plate, the springs, the clamping rods and the rod grooves are used in cooperation, the four clamping rods at the four corners of one side of the protection plate are clamped into the inner sides of the top ends of the two clamping strips, when the four clamping rods are clamped into the protection plate, the clamping strips are expanded, the springs in the telescopic grooves are compressed through the support till the four clamping rods are clamped into the rod grooves respectively, and therefore the protection plate is protected. The compressed spring can control the clamping strip to rebound and reset to clamp and support the protection plate, so that rapid installation can be realized, and the protection plate shields the swinging pieces on the two sides of the oscillator body, so that workers are prevented from being collided and injured.