22results about "Multiple-port active networks" patented technology

The utility model provides a high-temperature-resistant sinusoidal signal source filter circuit, which comprises a high-stability oscillation source module, the high-stability oscillation source module is composed of a crystal oscillator Y1 and other elements, the frequency stability of an oscillation source is ensured, the output frequency of a sinusoidal signal source can be changed by changing the frequency of the crystal oscillator, an inverter U1B shapes and outputs oscillation source signals, and the signal quality is further ensured. The power supply filtering module effectively eliminates circuit noise and interference, the high-stability voltage source module supplies power to the oscillation source circuit through a resistor R1, a voltage stabilizing diode D1 and a capacitor C5, the temperature stability of the oscillation source circuit is good due to the characteristics of the voltage stabilizing diode D1, and it is guaranteed that the circuit works stably under different conditions. The signal amplitude adjusting module can flexibly change the output amplitude of the sinusoidal signal source, the active band-pass filtering module can accurately convert square wave signals output by the oscillation source into sine wave signals, parameter setting is reasonable, and the characteristics of quality factor Q, gain G, center frequency F and the like enable the signal processing effect to be good. And parameters of the band-pass filter are matched with parameters of the oscillating source during debugging, so that the circuit is stable and reliable in overall performance, and is suitable for high-temperature environments and other scenes with high signal quality requirements.

A circuit may comprise a first multiplexer, a second multiplexer, a combination of logic gates, a third multiplexer, a first low-pas filter, and a second low-pass filter. The first multiplexer can be configured to receive and select a first clock signal, a second clock signal, a third clock signal, and a fourth clock signal. Respective phases of the first to fourth clock signals are related to each other. The second multiplexer can be configured to receive and select the first to fourth clock signals. The combination of logic gates may comprise a first logic gate and a second logic gate. The combination of logic gates can be coupled to the second multiplexer and can be configured to receive the second plurality of the first to fourth clock signals. The third multiplexer can be configured to receive and select the first to fourth outputs.

Embodiments of a re-driver and a resistance unit for a re-driver are disclosed. In an embodiment, a resistance unit for a re-driver comprises at least one resistor connected to an input / output of the re-driver, at least one switch connected in series to the at least one resistor, and a voltage regulator connected to the at least one switch and configured to generate a termination voltage for the at least one switch. Using the voltage regulator can avoid large voltage jumps at the input / output to keep the connected device safe, instead of grounding the at least one resistor.

An Ising machine system comprises a plurality of capacitors, a plurality of resistors having first and second terminals, wherein each capacitor is electrically connected to the first or second terminal of at least one resistor of the plurality of resistors via each of its positive and negative terminals, a power supply having positive and negative rails, a switching network configured to initialize each of the plurality of capacitors with a positive or negative voltage from the power supply, then disconnect all of the plurality of capacitors from the power supply, allowing the capacitor voltages to float, and at least one voltage measuring device configured to measure a voltage across the positive and negative terminals of a capacitor of the plurality of capacitors. A method of running an Ising machine system is also disclosed.

A non-linear superconducting quantum circuit comprising at least one resonant portion (30,32) and an asymmetrical threaded superconducting quantum interference device (34) connected to said at least one resonant portion (30,32) galvanically, said non-linear superconducting circuit having a first mode with a first resonant frequency and a second mode with a second resonant frequency, the ratio between said first resonant frequency and said second resonant frequency being different from ½, said at least one resonant portion (30,32) being configured with inductance and capacitance values of its symbolic representation which induce with said asymmetrical threaded superconducting quantum interference device (34) said first mode and said second mode such that, said non-linear superconducting quantum circuit has zero-point fluctuations of the superconducting phase across the asymmetrical threaded superconducting quantum interference device (34) for the first mode and the second mode which are superior or equal to 0.05 rad.

Embodiments of redrivers and resistive units for redrivers are disclosed. In an embodiment, a resistive unit for a redriver includes at least one resistor connected to an input / output terminal of the redriver, at least one switch serially connected to the at least one resistor, and a voltage regulator connected to the at least one switch and configured to generate a termination voltage for the at least one switch. Instead of grounding the at least one resistor, using the voltage regulator can avoid large voltage jump at input / output terminals to keep connected devices safe.

An electronic device according to an embodiment of the present disclosure may comprise: a processor; a memory electrically connected to the processor; a power management integrated circuit (PMIC) electrically connected to the processor; a radio frequency integrated circuit (RFIC) electrically connected to the processor; a power supply module including a power supply electrically connected to the PMIC and the processor; a front-end module including circuitry\electrically connected to the PMIC, the RFIC, and the power supply module, and is configured to modulate and amplify an RF signal received from the RFIC; a variable notch filter electrically connected to the power supply module and the front-end module, and connected to a transmission signal amplifier of the front-end module and configured to remove a harmonic frequency; and an antenna electrically connected to the front-end module, wherein the processor is configured to: control the PMIC and the power supply module to supply power to the front-end module; control a wireless communication operation to be performed using multiple frequency bands; and based on performing the wireless communication operation using the multiple frequency bands, control impedance of the variable notch filter to adjust a frequency removal band of the variable notch filter based on a parameter pre-stored in the memory.

A method is provided for adjusting the resonance frequency of a resonance circuit included in an electronic pen. The method uses adjusting means for adjusting the capacitance of an internal capacitor array and measuring means for measuring an alternating magnetic field generated by the resonance circuit. The method includes (1) a step of changing the state of a predetermined portion of multiple capacitive elements constituting the internal capacitor array, and (2) a step of changing, according to reference resonance frequency variations of the resonance circuit before and after the state change, the state of a portion or all of at least one capacitive element constituting the inner capacitor array other than said predetermined portion of the capacitive elements.

Disclosed is an electromagnetic-circuit co-design approach for massively reconfigurable, multifunctional, and high-speed programmable metasurfaces with integrated chip tiling. The ability to manipulate the incident electromagnetic fields in a dynamically programmable manner and at high speeds using integrated chip tiling approach is also disclosed. The scalable architecture uses electromagnetic-circuit co-design of metasurfaces where each individual subwavelength meta-element is uniquely addressable and programmable. The disclosed device comprises a large array of such meta-elements. The design relies on integrated high frequency switches designed in conjugation with meta-element for massive reconfigurability of incident amplitude and phase. The disclosed chip is multi-functional and can perform beamforming, high speed spatial light modulation, dynamic holographic projections, and wavefront manipulation.

The nonlinear superconducting quantum circuit includes at least one resonator (30, 32) and a superconducting quantum interferometer (34) with an asymmetric thread galvanically connected to the at least one resonator (30, 32). The nonlinear superconducting circuit has a first mode having a first resonant frequency and a second mode having a second resonant frequency. The ratio between the first resonant frequency and the second resonant frequency is different from 1 / 2. The at least one resonator (30, 32) is configured with inductance and capacitance values ​​whose symbolic representations induce the first and second modes through the superconducting quantum interferometer (34) with an asymmetric thread such that the nonlinear superconducting quantum circuit has a zero-point variation of 0.05 radians or more in the superconducting phase across the superconducting quantum interferometer (34) with an asymmetric thread in the first and second modes.

To provide a coupler and a calculator that can improve controllability.SOLUTION: A coupler according to an embodiment includes first through fourth capacitors, first and second inductors, and a first Josephson junction. The first inductor is electrically connected to the first capacitor. The second inductor is electrically connected to the second capacitor. The other end of the second inductor is electrically connected to the other end of the first capacitor, the other end of the second inductor, and the other end of the second capacitor. The first Josephson junction is electrically connected to the first and second capacitors. A space is provided which is surrounded by the first inductor, the second inductor and the first Josephson junction. The third capacitor is electrically connectable with a first nonlinear resonator. The fourth capacitor is electrically connectable with a second nonlinear resonator.SELECTED DRAWING: Figure 1

An excitation source circuit comprises a sinusoidal signal generation circuit, a D-type power amplification circuit, an LC filter and a push-pull switching power supply circuit. The sinusoidal signal generation circuit is used for outputting a sinusoidal signal; the D-type power amplification circuit is electrically connected with the sinusoidal signal generation circuit, and the D-type power amplification circuit realizes the amplification of a sinusoidal signal by controlling the on and off of a power switching device; the LC filter is electrically connected with the D-type power amplification circuit, and the LC filter processes the amplified sinusoidal signal and then outputs a driving signal; the push-pull switching power supply circuit is used for supplying power to the D-type power amplification circuit. According to the utility model, the noise of the excitation source circuit is reduced, and the measurement precision of the inductive displacement sensor is further improved.

A non-linear superconducting quantum circuit comprising at least one resonant portion and an asymmetrical threaded superconducting quantum interference device connected to said at least one resonant portion galvanically, said non-linear superconducting circuit having a first mode with a first resonant frequency and a second mode with a second resonant frequency, the ratio between said first resonant frequency and said second resonant frequency being different from ½, said at least one resonant portion being configured with inductance and capacitance values of its symbolic representation which induce with said asymmetrical threaded superconducting quantum interference device said first mode and said second mode such that, said non-linear superconducting quantum circuit has zero-point fluctuations of the superconducting phase across the asymmetrical threaded superconducting quantum interference device for the first mode and the second mode which are superior or equal to 0.05 rad.

A tunable filter (40; 50; 60; 70; 80; 80'; 90; 130) with tunable suppression, comprising: a first inductor (L1); a second inductor (L2) mutually coupled to the first inductor (L1), wherein the first inductor (L1) is connected in series with the second inductor (L2); and a tunable capacitor circuit (42; 52; 62; 72; 74; 92) which is electrically connected in parallel to the first inductor (L1) which has a switch (S11, S12, ..., S1N; S21, S22, ..., S2N; S31, S32, ..., S3N; S41, S42, ..., S4N; S51, S52, ..., S5N) and which is designed to match at least two notches in the frequency response of the tunable filter by changing a switching state of the switch (S11, S12, ..., S1N; S21, S22, ..., S2N; S31, S32, ..., S3N; S41, S42, ..., S4N; S51, S52, ..., S5N), wherein the tunable filter is designed to filter a high-frequency signal.

A non-linear superconducting quantum circuit comprising at least one resonant portion and an asymmetrical threaded superconducting quantum interference device connected to said at least one resonant portion galvanically, said non-linear superconducting circuit having a first mode with a first resonant frequency and a second mode with a second resonant frequency, the ratio between said first resonant frequency and said second resonant frequency being different from ½, said at least one resonant portion being configured with inductance and capacitance values of its symbolic representation which induce with said asymmetrical threaded superconducting quantum interference device said first mode and said second mode such that, said non-linear superconducting quantum circuit has zero-point fluctuations of the superconducting phase across the asymmetrical threaded superconducting quantum interference device for the first mode and the second mode which are superior or equal to 0.05 rad.

Various embodiments are described for controlling the resonant frequency of a resonator. The system includes at least one resonant circuit and an active variable reactance circuit that controls the resonant frequency of the at least one resonant circuit. The active variable reactance circuit includes an electrically controllable switching element and a switch controller subcircuit configured to switch the electrically controllable switching element at a frequency of a radio frequency (RF) current or voltage passing through or across the device such that the RF current flowing from a first terminal to a second terminal is substantially sinusoidal.

The invention discloses an operational amplifier and a current integrator using the same. The operational amplifier comprises an input stage, a current mirror circuit and a splicing circuit. The input stage includes a first input transistor and a plurality of second input transistors. The current mirroring circuit comprises a first mirroring circuit and a plurality of second mirroring circuits. The splicing circuit is connected to the current mirror circuit and the input stage, and the splicing circuit comprises a first splicing branch and a plurality of second splicing branches. The first splice branch is connected to the first input transistor and the first mirror circuit. The second splicing branches are respectively connected with the plurality of second input transistors and are respectively connected with the plurality of second mirror image circuits. The plurality of output ends are located between the second splicing branch and the second mirror image circuit.

The present application provides an equalizer and electronic equipment, the equalizer includes: continuous time linear equalizer, single-ended to differential circuit, adjustable gain amplifier and deserializer module, in the scheme, at least part of passive devices in the continuous time linear equalizer or single-ended to differential circuit is constituted by inverter, so that by using active devices instead of part of passive devices, the chip area and power consumption can be reduced.

The superconducting circuit comprises a resonator and a Josephson junction. The resonator comprises an inductor and a capacitor. The inductor comprises a first terminal and a second terminal. The second terminal of the inductor is electrically coupled to the first terminal of the capacitor. The second terminal of the capacitor is electrically coupled to the first terminal of the Josephson junction. The terminal shared by the inductor and the capacitor is configured to be electrically coupled to an alternating current (AC) voltage source having a particular frequency and a particular phase. The inductance of the inductor and the capacitance of the capacitor are selected to cause the resonator to resonate at a frequency and phase that substantially corresponds to the particular frequency and particular phase, respectively, of the AC voltage source to facilitate switching of the state of the Josephson junction via a single flux quantum (SFQ) pulse.

A filter device includes a series arm connecting input and output terminals. Parallel arms branch from the series arm to a ground terminal. The parallel arms include first and second parallel arms branching from portions of the series arm. The first and second parallel arm resonators are respectively provided in or on the first and second parallel arms. The parallel arm resonators each include an IDT electrode including electrode fingers. Each IDT electrode includes an overlap region. A number of pairs of electrode fingers of the IDT electrode in the first parallel arm resonator is greater than a number of pairs of electrode fingers of the IDT electrode in the second parallel arm resonator. An overlap width of the IDT electrode in the first parallel arm resonator is narrower than the overlap width of the IDT electrode in the second parallel arm resonator.

Methods and devices to address body leakage current generation and bias voltage distribution associated with body leakage current in an OFF state of a FET switch stack are disclosed. The devices include charge redistribution arrangements and bridge networks to perform coupling / decoupling to / from the FET switch stack. Detailed structures of such bridge networks are also described.

This utility model discloses a 1-40GHz downconverter component, comprising a 1-6GHz input channel, a 6-18GHz input channel, and a 33-40GHz input channel; a 3-18GHz output channel and a 1.75-1.85GHz output channel; the 1-6GHz input channel is composed of a 1-6GHz filter, a first limiter, a first amplifier, and a first power divider connected in series; the 33-40GHz input channel is composed of a 33-40GHz filter, a second limiter, a fourth amplifier, and a second power divider connected in series; the 6-18GHz input channel is composed of a 6-18GHz filter, a third limiter, a seventh amplifier, and a third power divider connected in series. This utility model has the advantages of wide bandwidth, high adaptability, high precision, and strong anti-interference, and also has dual-band coverage capability of 1-18GHz and 33-40GHz, which can seamlessly adapt to complex signals in multiple fields such as communication and radar, greatly improving the overall performance of electronic systems.