9 results about "Electronic oscillator" patented technology

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 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.

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.

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.

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).

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.