83results about "Frequency-independant attenuators" patented technology

A phase shifter (100) with controllable attenuation and a method for controlling the phase shifter is disclosed, the phase shifter (100) comprising a plurality of transmission line segments (120, 220) coupled in series, wherein each said transmission line segment (120, 220) comprises an attenuation circuit (130, 230), selectively couplable between a signal line (126, 222) of the transmission line segment (120, 220) and ground to selectively attenuate a signal propagating through the transmission line segment (120, 220). Each transmission line segment (120, 220) is switchable between a first configuration providing a first phase shift for a signal propagating through the transmission line segment (120, 220) and a second configuration providing a second phase shift, greater than said first phase shift, for a signal propagating through the transmission line segment (120, 220).

The present application discloses a phase shift circuit and a radio frequency microwave system. The phase shift circuit may comprise: a first node circuit, a second node circuit, and a first signal channel and a second signal channel coupled between the first node circuit and the second node circuit, wherein the first node circuit is configured to split an input signal so as to simultaneously output a first differential signal to the first signal channel and a second differential signal to the second signal channel; the first signal channel and the second signal channel are implemented on the basis of a differential circuit architecture, and are configured to respectively perform signal attenuation and / or quadrant transformation on the first differential signal and the second differential signal, so as to implement phase shift; the second node circuit is configured to synthesize a first phase-shifted signal output by the first signal channel and a second phase-shifted signal output by the second signal channel so as to obtain an output signal; and the phase difference between the output signal and the input signal is within the range of 0-360 degrees.

The invention discloses a power supply self-adaptive active temperature compensation attenuator which comprises a radio frequency attenuation circuit, a positive voltage temperature compensation driving circuit and a power supply self-adaptive adjusting circuit. The radio frequency attenuation circuit is connected in series in a signal link and comprises a transistor and a resistor; the positive voltage temperature compensation driving circuit comprises a transistor, a diode and a resistor. The driving transistor outputs a voltage playing a temperature compensation role by utilizing the temperature change of the electrical characteristic of the diode, and outputs the voltage to the radio frequency attenuation circuit in a voltage division manner; the power supply self-adaptive adjusting circuit comprises a resistor and a diode, the resistor and the diode adjust the grid voltage of a transistor in the driving circuit when the power supply fluctuates, the output voltage of the whole driving circuit is adjusted, and the influence of power supply fluctuation on the driving circuit is counteracted. Positive voltage is used for working, the structure is novel, the chip size is small, the temperature compensation characteristic is good, and the application range is wide; and the power supply interference resistance is good.

An electronic device may include a signal path that conveys a signal. The device may include an attenuator on the signal path that attenuates the signal. The attenuator may be free from series switches on the signal path. The attenuator may include a transmission line segment coupled in series between an input and an output of the attenuator. The transmission line segment may extend from a first terminal to a second terminal. A first adjustable resistance may couple the first terminal to ground. A second adjustable resistance may couple the second terminal to ground. The transmission line segment may have a length configured to perform impedance matching for the attenuator. A controller may control an attenuation level of the signal attenuator by adjusting the magnitude of the adjustable resistances. The controller may include a servo loop around an operational amplifier to mitigate process, voltage, and temperature variations in the attenuator.

The application relates to radio frequency technology and particularly provides an input overvoltage protection circuit of a radio frequency ADC, which comprises an ADC acquisition unit; a switching unit is used for selectively making a voltage signal enter a first channel or a second channel, wherein an attenuation circuit is arranged in the second channel; the output ends of the first channel and the second channel are sequentially connected with a first radio frequency operational amplifier and the ADC acquisition unit, the first radio frequency operational amplifier completes single-end to differential conversion; and an identification circuit is connected with the output ends of the first channel and the second channel, and when it is identified that the voltage of the first channel exceeds a set value, the voltage signal selects the second channel. The application has the advantages of good protection effect and the like and can be applied in a mass spectrometer.

A computing cable comprising a trace having a first impedance and an attenuator that includes a fixed resistor having a second resistance, a variable resistor having a first resistance, and a conductor having a second impedance. The combination of the first resistance, the second resistance, and the second impedance is based on the first impedance, wherein the first resistance is varied dynamically at runtime based on a control input.

The application provides a controllable attenuator based on a complementary open resonant ring structure, which is composed of a cascaded active gain compensation amplifier and an open resonant low-pass filter. The open resonant low-pass filter comprises a microstrip low-pass filter, a complementary open resonant ring, a variable capacitor and a control circuit. The microstrip low-pass filter is composed of a middle dielectric layer and a first metal surface and a second metal surface located on both sides of the dielectric layer. The complementary open resonant ring is designed on the second metal surface. The variable capacitor is connected in parallel between the inner metal surface and the outer metal surface of the complementary open resonant ring. The capacitance of the variable capacitor is adjusted through the control circuit, so as to control the attenuation amplitude of the controllable attenuator based on the complementary open resonant ring structure. The controllable attenuator based on the complementary open resonant ring structure has a very small volume and can be integrated into a chip.

The invention provides a broadband gain positive slope amplitude-phase control multifunctional chip for a T / R assembly, which relates to the technical field of radio frequency integrated circuits and comprises a receiving channel, a transmitting channel, an equalization circuit, a numerical control attenuator, a numerical control phase shifter, a transmitting-receiving change-over switch module and a parallel control module. The parallel control module is used for outputting parallel control signals to the numerical control attenuator, the numerical control phase shifter and the transceiving change-over switch module; the equalization circuit is respectively connected with the receiving channel and the transmitting channel through the transmitting-receiving change-over switch module, so that a signal path of the receiving channel and a signal path of the transmitting channel multiplex the equalization circuit, the numerical control attenuator and the numerical control phase shifter; and the equalization circuit is of an on-chip integrated structure and is used for adjusting the gain of the receiving channel and the gain of the transmitting channel to present a positive slope characteristic relative to the frequency in a wide frequency band so as to compensate the frequency attenuation of an external device.

The invention discloses a numerical control current mode attenuator and a module and a chip thereof. The numerical control current mode attenuator adopts a mode of cascading a plurality of attenuation units to realize high-attenuation-range and multi-bit attenuation of differential signals, and each attenuation unit comprises a phase inverter and two switch embedded circuits which are symmetrically arranged; and each switch embedded circuit comprises NMOS (N-channel metal oxide semiconductor) transistors M1 and M2 and resistors R1 and R2. A control signal controls the gate of M1 and also controls the gate of M2 via an inverter. Two ends of the R2 are respectively connected with the drain electrode and the source electrode of the M2. Drain electrodes of the M1 and the M2 are both connected with a pair of input differential signals, and a source electrode of the M2 outputs a pair of output differential signals through a source electrode of the M1 of the R1. A passive device network is adopted, low power consumption is achieved, corresponding matching circuit design is not needed, an inductor is not needed, and the technical problems that a traditional numerical control current mode attenuator is high in power consumption, and a large area of a chip is occupied when the chip is manufactured are solved.

The present application relates to a kind of methods for controlling digital attenuator in signal source power calibration, wherein the method comprises the following steps: start control host, signal source, power meter and establish communication connection between each other;Control host sends instruction to signal source, carries out parameter configuration;The power cache table of digital attenuator and power calibration record table are built;The initial code value of digital attenuator is set to obtain the actual output power of signal source;Inquire whether there is cached power record, if yes, directly use, if not, obtain actual output power from the power meter, and the test result is used to update the power cache table of the digital attenuator;The present application also relates to a corresponding device, processor and computer readable storage medium thereof.The signal source power calibration method for controlling digital attenuator, device, processor and computer readable storage medium thereof are used, and the calibration efficiency of signal source power is effectively improved.

The invention provides a K-band receiving component chip circuit device, which belongs to the technical field of radio frequency integrated microsystems and comprises a gallium arsenide low-noise amplification circuit and a silicon-based amplitude-phase multifunctional circuit. The gallium arsenide low-noise amplification circuit is located at the front end of the receiving link; the silicon-based amplitude-phase multifunctional circuit comprises a driving amplification circuit, a numerical control attenuation circuit, a numerical control phase shift circuit and a power distribution circuit. The output end of the gallium arsenide low-noise amplification circuit is connected with the input end of the driving amplification circuit, the output end of the driving amplification circuit is connected with the input end of the numerical control attenuation circuit, the output end of the numerical control attenuation circuit is connected with the input end of the driving amplification circuit, and the output end of the driving amplification circuit is connected with the input end of the numerical control phase shift circuit. The output end of the numerical control phase shift circuit is connected with the input end of the power distribution circuit, and the output end of the power distribution circuit is connected with the COM end. According to the invention, a complex circuit is simplified, the occupation of large-scale simulation on resources is reduced, the simulation time is shortened, and different K-band scenes are adapted.

The invention relates to a manually-adjusted high-power broadband attenuation control device and method. A first adjusting unit provides discrete gears corresponding to different first attenuation values, and a second adjusting unit provides discrete gears corresponding to different second attenuation values. The processing module determines an attenuation value according to input information of the first adjusting unit and the second adjusting unit, calculates a target attenuation value, converts the target attenuation value into a 6-bit parallel binary control code, and outputs the 6-bit parallel binary control code to the program control attenuation module through a parallel interface. And each bit of the control code corresponds to a weighted attenuation bit, so that independent start and stop of the attenuation unit are realized. The method comprises the steps of detecting a pin level, determining an attenuation value, calculating a target value, generating a control code and outputting an instruction. And when the target attenuation value exceeds 63dB, forcibly outputting a maximum attenuation instruction. According to the scheme, the operation process is simplified through a two-stage adjustment framework, the response speed is improved through parallel direct drive control, the full-band signal attenuation stability is guaranteed through the metal shielding shell integrated design, and the high-power test device is suitable for a high-power test scene of the frequency band of 0.5-40 GHz.

The utility model relates to the technical field of wireless communication, in particular to a small-sized low-phase-noise frequency source module, which comprises a box body and a circuit sub-module arranged on the box body. The circuit sub-module comprises a signal input unit, a broadband reference output unit, a local oscillator signal conversion unit, an intermediate frequency signal conversion unit, a frequency mixer, a first amplifier, a first filter, a first attenuator ATT-3db, a frequency divider, a second filter, a second amplifier, a first coupler, a second attenuator ATT-3db, a first power divider and two third attenuators ATT-3db; two third amplifiers, two third filters and two second couplers; in this way, the technical problems that a frequency source module used in the prior art is poor in phase noise, large in size and large in stray are solved.

The invention discloses a radio frequency signal source output power control method, and the method comprises the steps: dividing the output power range of a standard radio frequency signal source and the numerical control attenuation range of a numerical control attenuator to obtain a plurality of control regions, and enabling the boundary point of each control region to correspond to one output power, one frequency and one numerical control attenuation; constructing a standard corresponding relation for each control area based on the voltage-controlled attenuation amount corresponding to the voltage-controlled attenuator; and controlling the to-be-controlled radio frequency signal source based on the standard corresponding relation, the target frequency and the target power, thereby accurately controlling the power required by the output of the radio frequency signal source, and avoiding a relatively large error of the output power.

A PIN diode electrically controlled attenuation circuit comprises a radio frequency main link and a direct current bias circuit, the positive electrode of a PIN diode D1 is connected with the negative electrode of a PIN diode D2 through a microstrip circuit 1, and the negative electrode of the PIN diode D1 is connected with one end of a capacitor C1; the positive electrode of the PIN diode D4 is connected with the negative electrode of the PIN diode D3 through the microstrip circuit 4, and the negative electrode of the PIN diode D4 is connected with one end of the capacitor C2; the positive electrode of the PIN diode D2 is connected with one end of the microstrip circuit 2, the positive electrode of the PIN diode D3 is connected with one end of the microstrip circuit 3, and the other end of the microstrip circuit 2 is connected with the other end of the microstrip circuit 3; a driving current Ic is connected with one end of a capacitor C3 and one end of a resistor R6, the other end of the resistor R6 is connected with one end of an inductor L4, the other end of the inductor L4 is connected to one end of an inductor L3 and one end of a capacitor C4, the other end of the capacitor C3 and the other end of the capacitor C4 are respectively grounded, the other end of the inductor L3 is connected with one end of a resistor R5, and the other end of the resistor R5 is connected with the other end of the microstrip circuit 2 and the other end of the microstrip circuit 3. The circuit is simple, the attenuation dynamic range is enlarged, and attenuation stability is improved.

The utility model relates to a frequency multiplier module with phase noise deterioration value calibration, which comprises a first attenuator, a first filter, a second attenuator, a second filter and an intermediate driving module, and is characterized in that the signal input end of the frequency multiplier module is electrically connected with the first attenuator and the first filter; the output end of the first attenuator is electrically connected with the input end of the first filter; the output end of the frequency multiplier module is electrically connected with a second attenuator and a second filter, and the output end of the second attenuator is electrically connected with the input end of the second filter; and at least two groups of intermediate driving modules are electrically connected between the first filter and the second attenuator. According to the utility model, after calibration parameters are obtained by measuring each calibration channel and a finally output phase noise deterioration value, the frequency multiplier module can be applied to a scene without a high-precision measuring instrument, the frequency can reach the ground noise which can be measured by a common frequency spectrograph, and the accuracy of the frequency multiplier module after compensation and calibration also reaches a relatively high level.

The utility model discloses a switch type attenuator with adjustable phase and precision. The switch type attenuator comprises a first phase adjusting module, a first precision adjusting module, a main attenuation module, a second precision adjusting module and a second phase adjusting module which are sequentially connected in series on a main circuit, the switch input end of the main attenuation module is connected with a first control switch voltage; each of the first phase adjusting module and the second phase adjusting module comprises a basic phase adjusting unit and at least one compensation phase adjusting unit which are connected in sequence; each of the first precision adjusting module and the second precision adjusting module comprises a third transistor and a fourth transistor. According to the utility model, the simple switch type attenuation circuit is used to realize attenuation precision compensation under different temperature conditions, no extra insertion loss is introduced, the low insertion loss performance of the switch type attenuator is ensured, the switch type phase adjusting module is used, the high-frequency phase is optimized, and the performance of the attenuator is improved. And meanwhile, the robustness of the switch type attenuator in the ultra wide band is improved.

The present disclosure discloses a phase shift attenuation circuit, a phase shift attenuation network, and a radio frequency (RF) microwave system. The phase shift attenuation circuit comprises a plurality of first differential circuits electrically connected in sequence; an electrical connection between two adjacent first differential circuits of the plurality of first differential circuits including at least one of a straight-through connection or a connection through an attenuator unit; wherein the phase shift attenuation circuit realizes 8-bit step attenuation through the attenuator unit; 7-bit step attenuation among the 8-bit step attenuation is configured to realize a phase shift function, and the 8-bit step attenuation is configured to realize phase shift and attenuation functions. The phase shift attenuation circuit is constructed based on a differential circuit architecture, and is capable of simultaneously realizing the phase shift and attenuation functions by the same circuit.

The invention discloses an automatic gain control adjusting circuit for a radio frequency receiver and an adjusting method of the automatic gain control adjusting circuit. The automatic gain control adjusting circuit comprises a radio frequency main circuit and an adjusting branch circuit, the radio frequency main circuit comprises a plurality of voltage-controlled attenuators, a plurality of amplifiers, a plurality of fixed attenuators and a one-to-two power divider which are connected in sequence, the plurality of voltage-controlled attenuators, the plurality of amplifiers, the plurality of fixed attenuators and the one-to-two power divider are cascaded in sequence, one end of the output end of the one-to-two power divider outputs signals, and the other end of the output end of the one-to-two power divider is connected with the adjusting branch circuit; the detector, the operational amplifier and the voltage-controlled attenuator cyclically and automatically adjust the power of the output radio-frequency signal, so that the output power of the radio-frequency signal is controlled within a smaller power range.

A module has two portions, each portion has two units provides an analog-type attenuator-tuning approach having digital control. Each of the units includes an input, an output, three selectable conductive paths, and an input switching element for selectably connecting the unit input to the unit output via one of the three selectable conductive paths. The first and second paths have attenuation elements. The unit output of the first unit of each portion is connected to the unit input of the second unit thereof and the unit output of the via one of the three selectable conductive paths, the unit output of the first unit of each portion is connected to the unit input of the second unit thereof, and the unit output of the second unit of the first portion is connected to the unit input of the first unit of the second portion.

A resonator device includes a substrate with a first number of fins extending over the substrate. The fins extend along the substrate in a first direction. A second number of conductive fingers are provided over the fins, which extend in a second direction perpendicular to the first direction. The first number is less than or equal to the second number. The conductive fingers are configured to receive an input signal such that the conductive fingers resonate at an output frequency. The conductive fingers define a finger pitch therebetween, and the output frequency is based on the finger pitch.

A multi-level digital step attenuator (DSA) with a hybrid attenuation circuit is shown. The hybrid attenuation circuit is coupled between an input node and an output node of the multi-level DSA. The bypass switch of the multi-level DSA is controlled to provide a bypass path between the input node and the output node of the of the multi-level DSA when the hybrid attenuation circuit is in a disabled state. In the first active state, the hybrid attenuation circuit is switched to form a T-type structure to provide a first amount of signal attenuation. In the second active state, the hybrid attenuation circuit is switched to form a Pi-type structure to provide a second amount of signal attenuation.

The present invention realizes an attenuator circuit and an output load circuit capable of suppressing performance degradation and compensating for variations in gain due to temperature characteristics of a power amplifier element. An attenuator circuit (1) is provided with: an input / output circuit (10) provided at the preceding stage of a power amplifier; and a first control circuit (20) that controls the gain of the input / output circuit (10). An input / output circuit (10) is provided with at least: a first resistor (11) electrically connected between an input terminal (ATTin) and an output terminal (ATTout); and a first FET (12) electrically connected between the output terminal (ATTout) and the reference potential point (GND). The first control circuit (20) is provided with at least a second FET (21) having substantially the same on-resistance as the first FET (12) when the same gate bias voltage as the first FET (12) is applied. The gate of the first FET (12) and the gate of the second FET (21) are electrically connected.

The application discloses a precision-adjustable wideband temperature compensation circuit based on a gallium arsenide process and relates to the technical field of integrated circuits.The circuit comprises a temperature compensation driving module, a temperature compensation attenuation module and a temperature compensation precision control logic module.The temperature compensation driving module senses environmental temperature changes through a clamping circuit and a differential network and outputs an analog control voltage.The temperature compensation attenuation module comprises a plurality of parallel controllable attenuation units, each of which comprises two series-connected transistors, and the on-off of each controllable attenuation unit is controlled by a switch signal of the control logic module and the attenuation amount of each controllable attenuation unit is controlled by an analog voltage of the driving module.The control logic module controls the conduction of different numbers of attenuation units by receiving an external TTL signal, so that the multi-gear adjustment of the overall temperature compensation precision is realized.The application overcomes the shortcomings of the traditional temperature compensation circuit, such as unadjustable precision and narrow frequency band, and has the advantages of wide working frequency band, adjustable temperature compensation precision, compact structure and easy integration, and is suitable for high-performance millimeter wave communication systems.

The invention relates to a radio frequency technology, and particularly provides an input overvoltage protection circuit of a radio frequency ADC (Analog to Digital Converter). The switching unit is used for enabling a voltage signal to selectively enter the first channel or the second channel, and the attenuation circuit is arranged in the second channel; the output end of the first channel and the output end of the second channel are sequentially connected with a first radio frequency operational amplifier and the ADC acquisition unit, and the first radio frequency operational amplifier completes single-end-to-differential conversion; the identification circuit is connected with the output ends of the first channel and the second channel, and when it is identified that the voltage of the first channel exceeds a set value, the voltage signal selects the second channel. The invention has the advantages of good protection effect and the like, and is applied to mass spectrometers.

The application provides a pulse radiator, relates to the field of microwave radio frequency technology, and comprises a radio frequency multistage amplification link and a measurement and control communication component; the radio frequency multistage amplification link generates an output pulse signal; the measurement and control communication component performs real-time monitoring and regulation on the output pulse signal, and is configured with a self-adaptive degradation fault prevention shutdown control strategy. In a continuous radiation working mode, operating state parameters are continuously acquired; when the operating state parameters reach a preset warning limit, the self-adaptive degradation control is triggered, a dynamic attenuation control code is issued to reduce the output gain to enter a degradation working mode; during the degradation working mode, the parameter development trend is continuously monitored; when the parameters recover to a safe interval, the dynamic attenuation control code is reversely adjusted to smoothly recover the output gain to the initial setting state. The application prevents hard power-off shutdown of the equipment caused by abnormal working conditions, and maintains continuous radiation of the signal.

A phase-shifting circuit and a radio frequency microwave system are provided. The phase-shifting circuit includes a first node circuit, a second node circuit, and a first signal channel and a second signal channel coupled between the first node circuit and the second node circuit. The first node circuit is configured to split an input signal to simultaneously output a first differential signal to the first signal channel, and output a second differential signal to the second signal channel. The first signal channel and the second signal channel are implemented based on an architecture of a differential circuit, and configured to perform at least one of a signal attenuation and a quadrant transformation on the first differential signal and the second differential signal for phase-shifting. The second node circuit is configured to synthesize a first phase shift signal output by the first signal channel and a second phase shift signal output by the second signal channel to obtain an output signal, and a phase difference between the output signal and the input signal is within a range of 0 deg-360 deg.

A bidirectional amplifier module and an adjustment method are provided. The purpose of the present invention is to adjust an RF output level to a predetermined output level without degrading a transmission RF signal. The present invention is provided with: an antenna-side terminal; a main body-side terminal; a signal amplification circuit provided between the antenna-side terminal and the main body-side terminal and capable of adjusting the amplification factor of the transmission RF signal; a state detection unit that detects whether a transmission state or a reception state; an output level detection unit that detects an RF output level of the antenna; and a control unit that switches the transmission / reception state of the signal amplification circuit, the control unit acquires the RF output level from the output level detection unit when the transmission state is detected by the state detection unit, and when a transition from the transmission state to the reception state is detected by the state detection unit, the control unit outputs the RF output level from the output level detection unit after a predetermined standby time has elapsed. The state detection means confirms whether or not the reception state has been continuously detected, and if it is confirmed that the reception state has been continuously detected, adjusts the amplification factor of the transmission RF signal on the basis of the acquired RF output level.

There is provided a variable attenuator including: a transmission line which has an open stub that is connected between an input and an output of the variable attenuator; a first switch which is connected between the input and a reference potential; and a second switch which is connected between the output and the reference potential.

The application provides a coupling filter amplification attenuation multifunctional chip, and relates to the technical field of integrated circuits.The device comprises a single-pole single-throw switch, a coupler, a high-pass filter, a low-noise amplifier, a digital control attenuator and a positive voltage parallel driving network;the single-pole single-throw switch is connected with the coupler and the positive voltage parallel driving network;the high-pass filter is connected with the coupler and the low-noise amplifier;the low-noise amplifier is connected with the digital control attenuator;and the digital control attenuator is connected with the positive voltage parallel driving network.The application solves the problems of insufficient wide frequency band, low gain, low linearity, high power consumption, large high-low temperature fluctuation, low attenuation precision and low integration of the integrated circuit.