570 results about "Low-noise amplifier" patented technology

The invention relates to the technical field of wireless communication, and provides a radio frequency low-noise amplifier which comprises an input matching module, a power amplification module, an output matching module, an RC attenuation module and an RC feedback module, the first end of the first inductor serves as the input end of the output matching module, the first end of the first inductor is connected with the output end of the power amplification module, the control end of the switch and the first end of the first adjustable resistor, and the second end of the first inductor is connected with the first end of the second inductor and the first end of the third capacitor. The output end of the switch is connected with the first end of the first capacitor and the first end of the second capacitor. The second end of the second capacitor is connected with the second end of the first adjustable resistor and the second end of the second inductor and used for being connected with a power supply. The second end of the first capacitor is connected with the second end of the third capacitor and serves as the output end of the output matching circuit. The radio frequency low-noise amplifier is adjustable in gain, low in noise and good in linearity performance.

Disclosed is a technology related to a low noise amplifier applied between an RF receiver and an RF switch. A phase difference matching circuit having the same phase difference as a positive gain amplifier is added to an output terminal of an attenuator of a low noise amplifier having a variable gain switching structure. In addition, a variable impedance circuit connected to an output terminal of the positive gain amplifier and an output terminal of a phase difference matching unit to finely adjust the phase difference of each output terminal may be further included.

The invention provides a low-noise amplification circuit, a radio frequency front-end module and an electronic terminal.The low-noise amplification circuit comprises an input matching adjustment circuit, a common-source amplification circuit, a first inductor, an inter-stage feedback circuit, a common-gate amplification circuit, an input and output feedback circuit, an output matching adjustment circuit and an output attenuation circuit; the common-source amplification circuit comprises at least two first signal amplification units; each first signal amplification unit comprises a first field effect transistor; the common-gate amplification circuit comprises at least two second signal amplification units; and each second signal amplification unit comprises a second field effect transistor. According to the low-noise amplification circuit, transconductance nonlinearity of devices under different bias signals can be mutually counteracted, so that the linearity fluctuation of the low-noise amplification circuit at different temperatures is optimized, and the linearity of the low-noise amplification circuit is kept basically not to change along with the temperature change.

The invention provides a Q / V frequency band large-scale satellite communication load channel optimization method, which comprises a forward input link and a backward output link, and is characterized in that the forward input link comprises a V frequency band multi-beam antenna feed source array, a plurality of input preselectors, a V frequency band low noise amplifier input switch ring and a V / Ka integrated receiver assembly which are connected in sequence; the output end of the V-band multi-beam antenna feed source array is connected with the input end of the V / Ka integrated receiver assembly through a waveguide. The reverse output link comprises a Ka / Q frequency converter, a Q-band channel filter, a Q-band traveling wave tube amplifier, a change-over switch, a Q-band output duplexer or filter and a Q-band feed beam which are connected in sequence, and the output end of the Ka / Q frequency converter is connected to the input end of the Q-band channel filter through a waveguide; and the output end of the Q-band channel filter is directly connected to the input end of the Q-band traveling wave tube amplifier through the waveguide. Therefore, the method is low in link loss, high in space utilization rate and high in feasibility.

The invention provides a low-noise amplifier and a radio frequency front-end module, and the low-noise amplifier comprises an input matching circuit, a first-stage power amplification circuit, an inter-stage matching circuit, a second-stage power amplification circuit and an output matching circuit. The inter-stage matching circuit comprises a first inductor, a second inductor and a first capacitor; the second-stage power amplification circuit is of a cascode structure; and the output matching circuit comprises a third inductor and a fourth inductor which are coupled with each other. According to the low-noise amplifier, the high-frequency gain, the in-band gain flatness, the isolation degree, the stability and the output matching bandwidth of the low-noise amplifier can be improved.

The utility model provides a kind of electrostatic discharge protection circuit and low noise amplification module, the electrostatic discharge protection circuit is applied to low noise amplification circuit, the low noise amplification circuit includes input matching circuit and the low noise amplifier of the output end being connected to the input matching circuit;The electrostatic discharge protection circuit includes inductance and resistance;The first end of the inductance is used to connect to the signal input end of low noise amplifier;The first end of the resistance is connected to the second end of the inductance, and the second end of the resistance is grounded.The electrostatic discharge protection circuit in the utility model is connected to the input end of low noise amplifier, and the noise coefficient of low noise amplifier will not be deteriorated, and the performance of low noise amplifier will not be affected, and the input stability of low noise amplifier will not be affected simultaneously.

The utility model relates to the technical field of wireless communication, and provides a low noise amplifier and a radio frequency chip, comprising an input matching circuit, a power amplification circuit and an output matching circuit which are electrically connected in sequence, the power amplification circuit comprises a first MOS tube and a second MOS tube, the grid electrode of the first MOS tube is used as the input end of the power amplification circuit and is connected to the output end of the input matching circuit, the source electrode of the first MOS tube is grounded, the drain electrode of the first MOS tube is connected with the source electrode of the second MOS tube, and the drain electrode of the second MOS tube is used as the output end of the power amplification circuit and is connected to the input end of the output matching circuit; the low-noise amplifier further comprises an inductance switching circuit capable of being combined into different inductance values, and the source electrode of the first MOS tube is connected with the inductance switching circuit in series and then is grounded. According to the low-noise amplifier, switching of various inductance values of the source electrode inductor can be achieved, and higher flexibility is brought to compromise of indexes of low-gain gears.

The invention relates to the technical field of electronic circuits, in particular to a radio frequency front-end lightning protection circuit and lightning protection equipment. The circuit comprises a primary discharge module, a radio frequency signal protection branch and a direct current power supply protection branch, the input end of the primary discharge module is connected with an antenna port, and the primary discharge module is used for discharging high-energy pulses generated by lightning stroke; the radio frequency signal protection branch is connected between the output end of the primary discharge module and a low noise amplifier of the radio frequency receiving link, and is used for coupling a radio frequency signal to the low noise amplifier and carrying out isolation and voltage limiting on a lightning stroke residual pulse; the direct current power supply protection branch circuit is connected between the output end of the primary discharge module and a power supply voltage stabilizer of the direct current power supply link, and is used for transmitting a direct current power supply to the power supply voltage stabilizer and carrying out isolation and voltage limiting on the lightning stroke residual pulse. The circuit can be combined with a radio frequency front end and used for a navigation antenna, and the lightning stroke protection capability is improved.

Device structures and fabrication methods for MOSFETs having a novel multiple-conductive layer “T”-shaped gate (as viewed in cross-section). The novel “T-gate” significantly decreases the gate resistance RG of a MOSFET device and thus increases the figure-of-merit fMAX (the maximum device oscillation frequency, or the frequency at which the maximum power gain equals unity) and reduces the noise factor (NF) of the device. Fabrication of the novel MOSFET devices may be readily integrated into existing IC fabrication processes, and such MOSFETs may have gate lengths Lg scaled below the lithographic capabilities of the fabrication process. Some embodiments include conformal gate side-spacers. Some embodiments include non-conformal air-gapped gate side-spacers that result in reduced parasitic gate-to-source capacitance CGS and gate-to-drain capacitance CGD, with concomitant improved performance at high radio frequencies (RF). Embodiments of the novel MOSFET device enable RF circuits, such as low-noise amplifiers (LNAs), to exhibit a better noise figure parameter, NFmin.

Apparatus and methods for power amplifier signal limiting are disclosed. In certain embodiments, a front-end system includes a low noise amplifier that amplifies a radio frequency receive signal during a receive frame, a power amplifier that amplifies a radio frequency transmit signal during a transmit frame, and a signal limiter operable to limit a signal power of the power amplifier in an attenuating mode. The signal limiter includes a radio frequency detector configured to generate a detection signal based on detecting a power level of the radio frequency transmit signal, and a latch that locks the signal limiter in the attenuating mode in response to activation of the detection signal. The latch is reset by a bias signal of the power amplifier that is activated during the transmit frame and deactivated during the receive frame.

The invention provides a radio frequency front-end circuit, a radio frequency receiving device and electronic equipment. The radio frequency front-end circuit comprises a first integrated filter, a first discrete combiner, an integrated noise amplifier and an integrated receiving chip; the first integrated filter receives a first sub-signal of a first frequency band and a second sub-signal of a second frequency band in the original radio frequency signal through which the original radio frequency signal passes, and filters out signals of other frequency bands; the first discrete combiner receives the first sub-signal and the second sub-signal and combines the first sub-signal and the second sub-signal into a first combined signal; the integrated low-noise amplifier performs low-noise amplification on the first combined signal to obtain a second combined signal, wherein the second combined signal comprises a third sub-signal of the first frequency band and a fourth sub-signal of the second frequency band; the integrated receiving chip is provided with a first receiving pin and a second receiving pin, the first receiving pin is used for receiving the third sub-signal, and the second receiving pin is used for receiving the fourth sub-signal. According to the radio frequency front-end circuit, the number of integrated devices can be reduced, and the cost is reduced.

An electronic device may include wireless circuitry with a processor, a transceiver circuit, a front-end module, and an antenna. The front-end module may include amplifier circuitry such as a low noise amplifier for amplifying received radio-frequency signals. The amplifier circuitry may include non-linearity suppression circuitry that suppresses or reduces non-linear behavior of components such as a core amplification transistor and a degeneration inductor within the amplifier circuitry. The non-linearity suppression circuitry may include an intermodulation distortion suppression circuit having an auxiliary amplification transistor. The non-linearity suppression circuitry may include a frequency-selective filter coupled to the degeneration inductor.

An analog frontend architecture for a capacitive pressure sensor. The analog frontend architecture includes a low-noise amplifier unit for low-noise amplification of sensor signals of the capacitive pressure sensor, the low-noise amplifier unit including a first integrator unit and a second integrator unit, the first integrator unit being connected to input terminals of the low-noise amplifier unit, being designed as a boxcar integrator, and being configured to amplify sensor signals of the capacitive pressure sensor according to the boxcar integration technique, and the second integrator unit being connected to output terminals of the low-noise amplifier unit and being configured to integrate the amplified voltage signals of the first integrator unit.

A radio-frequency module includes one or more first electronic components disposed on one main surface and one or more second electronic components disposed on another main surface. The one or more first electronic components include at least one of a filter whose passband includes a first band, a switch connected to the filter, a power amplifier connected to the filter, and a switch connected to the filter. The one or more second electronic components include at least one of a filter whose passband includes a second band in which the frequency of a harmonic wave of a signal in the first band is included, a switch connected to the filter, a low-noise amplifier connected to the filter, and an inductor connected to a path that forms a connection between the first low-noise amplifier and an antenna connection terminal.

The invention discloses an interphone power saving method and device for dynamically adjusting a low noise amplifier working point, and the method comprises the following steps: S1, periodically collecting a digital intermediate frequency signal in a receiving stage, and calculating a first parameter and a second parameter, the first parameter being a current received signal strength indication value, and the second parameter being a current signal-to-noise ratio estimation value; s2, when the first parameter is higher than a first threshold value and the second parameter is higher than a second threshold value, it is judged that a low-power-consumption access condition is met; s3, when N continuous cycles all meet the low-power-consumption access condition, the baseband processor outputs a first control signal, and the bias working point of the low-noise amplifier is switched to a low-power-consumption mode; and S4, in a low-power-consumption mode, if the first parameter is lower than a third threshold value or the second parameter is lower than a fourth threshold value, outputting a second control signal, and switching the bias working point of the low-noise amplifier to a high-performance mode, thereby solving the problem of high static power consumption of the interphone receiving link on the premise of ensuring the communication reliability.

The invention discloses a single-power-supply ultra-wideband temperature compensation low-noise amplifier circuit, and belongs to the technical field of radio frequency microwaves. The circuit is mainly composed of a pre-stage low-noise amplifier module, an inter-stage temperature compensation equalization module and a post-stage driving amplifier module. The temperature compensation equalizer module generates differential voltage related to temperature through a three-stage gallium arsenide diode temperature sensing unit, outputs a control signal through an enhanced FET differential amplification circuit, drives a voltage-controlled attenuation equalizer to dynamically adjust the attenuation amount of a radio frequency signal, and achieves gain stability in a frequency band. Through the collaborative design of a blocking capacitor and a divider resistor, the grid bias of an FET switch is strictly limited in a transconductance linear adjustment interval, and the interval covers 80% of the effective range of the threshold voltage of a gallium arsenide FET tube. The circuit is powered by a single power supply + 5V, stable work of each module is ensured through active bias and a power supply filter network, and the circuit is suitable for extreme temperature environments such as high-frequency communication and radar.

The invention discloses a defect coupling low-noise amplifier. The low-noise amplifier solves the problem that the performance of a low-noise amplifier in the prior art is influenced by a grid source inductance coupling coefficient. Forward coupling of an input inductor and a grid inductor and reverse coupling of the input inductor and a source inductor are achieved through a unique defect coupling transformer matching network, meanwhile, reverse coupling of a grid inductor and the source inductor is achieved, and the coupling coefficient of the grid-source inductor is reduced through coupling counteracting inductance; by combining a differential common-source transconductance amplification stage, a four-order magnetic coupling resonance unit, a differential transconductance amplification stage with a neutralizing capacitor and an output transformer matching network, the characteristics of high gain bandwidth and low noise are realized; simulation and actual tests verify that the low-noise amplifier can effectively reduce the noise coefficient and broaden the input matching range, has good compatibility and wide application prospects based on a conventional integrated circuit production process, can be applied to a phased array system, and can also form a receiver system with other circuits.

Apparatus and methods for fast and accurate biasing of LNAs are provided herein. In certain embodiments, an LNA includes an amplification circuit that amplifies a radio frequency (RF) input signal, and a biasing circuit that generates a bias voltage for the amplification circuit based on comparing a sensed bias current through the amplification circuit to a reference current.

An apparatus includes a main power amplifier (PA) and an auxiliary PA of a Doherty power amplifier coupled to an electromagnetic (EM) structure having a plurality of branches, capacitances selectively coupled to an output of the main PA and to an output of the aux PA, respectively, a low noise amplifier (LNA) coupled to the EM structure, and a port comprising an antenna interface coupled to the EM structure.

A low-noise amplifier structure utilizing horizontally stacked field-effect transistors (FETs) is described. The stacked FET structure includes two FETs stacked horizontally and connected in series (e.g., with a shared source / drain region). The stacked FET structure described a pitch between gates that is increased above a minimum pitch defined for a transistor region of the device. Increasing the pitch reduces a metallurgical channel length of a second FET in the stacked structure below what the metallurgical channel length would be at the minimum pitch. Reducing the metallurgical channel length improves the signal-to-noise ratio of the low-noise amplifier structure.

The present application relates to the technical field of radio frequency circuits. Provided are a radio frequency front-end module and an electronic device. The radio frequency front-end module comprises: a first antenna switch, a first filter assembly, a second filter assembly, a first power amplifier, a first low noise amplifier and a second low noise amplifier. The first filter assembly is used for transmitting signals in a first frequency band, and the second filter assembly is used for transmitting signals in a second frequency band. The first antenna switch is coupled to a first antenna, and the first antenna is used for transmitting transmission signals in the first frequency band and receiving reception signals in the first frequency band. In a first state, the first antenna switch is in a dual-on state, and can support low-band + low-band combination scenarios. In the low-band + low-band scenarios, the module can simplify circuits, reduce costs, and facilitate module miniaturization.

The invention discloses a real-time damage detection device for a communication receiver under strong electromagnetic pulse impact, and belongs to the field of electromagnetic compatibility. According to the device, different signal injection modes are adopted, the injection power and the injection duration of signals are adjusted, an injection experiment of high-power electromagnetic pulses is carried out, and the damage condition of the communication receiver under strong electromagnetic pulse attack in a complex electromagnetic environment is simulated through the working state of the most sensitive first-stage low noise amplifier of the receiver, so that the reliability of the communication receiver is improved. And real-time damage detection is carried out, and exploration about damage conditions is carried out, so that timely maintenance and further protection of the communication receiver in a complex environment are facilitated. The device can simulate the impact effect of strong electromagnetic pulses on the communication receiver, comprehensively monitor the working state of the communication receiver in real time and record the damage condition, provide core support for rapid positioning and isolation of fault equipment, and remarkably shorten the communication link repair time.

Radio frequency (RF) communication systems with interference cancellation for coexistence are provided herein. In certain embodiments, an RF communication system includes a transmitter including a power amplifier that amplifies an RF transmit signal, a receiver including a low noise amplifier (LNA) that amplifies an RF receive signal, and an interference cancellation circuit that selects a bandpass filter from a plurality of bandpass filters to filter the RF transmit signal after amplification by the power amplifier. The selected bandpass filter operates in combination with a controllable gain circuit and a controllable phase circuit to generate an analog interference cancellation signal that is injected into the receiver to compensate the RF receive signal for interference arising from the transmitter.

An apparatus for wireless communications includes a power amplifier, a low-noise amplifier, a power detector, and a transformer. The transformer includes a first inductor coupled to an output of the power amplifier, and a second inductor coupled to an antenna, wherein the second inductor is magnetically coupled with the first inductor. The transformer also includes a third inductor coupled to an input of the low-noise amplifier, wherein the third inductor is magnetically coupled with the second inductor. The transformer also includes a coupling inductor coupled to an input of the power detector, wherein the coupling inductor is magnetically coupled with at least one of the first inductor and the second inductor.

This disclosure provides systems, methods, and devices for wireless communications that support enhanced two-stage low-noise amplifiers with feedforward circuitry. In a first aspect, a receiver circuit includes a two-stage low-noise amplifier (LNA) configured to amplify a radio frequency (RF) input signal and output a combined amplified RF input signal to a mixer. The two-stage LNA includes a first gain stage configured to amplify the RF input signal and output the amplified RF input signal to a second gain stage of the two-stage LNA and to the mixer via a feedforward path, and includes the second gain stage configured to amplify the amplified RF input signal received from the first gain stage. The two-stage LNA further includes feedforward circuitry in the feedforward path and configured to provide the amplified RF input signal from the first gain stage to the mixer. Other aspects and features are also claimed and described.

The invention is suitable for the technical field of radio frequency front ends, and particularly relates to a low-noise amplifier and a radio frequency chip. The low-noise amplifier provided by the invention comprises an input switching circuit, an amplifying circuit and an output matching circuit which are electrically connected in sequence, the input switching circuit comprises a plurality of input matching units, and the plurality of input matching units are used for receiving radio frequency signals of different frequency bands respectively; the amplifying circuit comprises a first amplifying unit, a first inductor and a plurality of second amplifying units connected in parallel, the input ends of the second amplifying units serve as the input end of the amplifying circuit, and the input ends of the second amplifying units are connected with the output ends of the input matching units in a one-to-one correspondence mode. Compared with the prior art, the low-noise amplifier disclosed by the invention can be used for independently optimizing the input impedance of each input port, so that not only can the noise coefficient be optimized, but also the optimal gain and linearity performance can be obtained.

The disclosed embodiments relate to an isolation method for full-duplex communication. The full-duplex antenna system includes a Tx (transmit) signal path comprising one or more elements, each element representing a power amplifier, one or more filters, and a Tx port of a Tx patch antenna operating in the Tx band to transmit an output signal to a satellite. Each of the one or more elements includes an Rx (receive) signal path, comprising a low-noise amplifier driven by the Rx port of an Rx patch antenna operating in the Rx band to receive an input signal from a satellite. The Rx band is separated from the Tx band by a guard band. The filters, together with the physical isolation between the Tx and Rx signal paths, provide sufficient isolation to reduce coupling between the Tx and Rx signal paths, thereby allowing the full-duplex antenna system to operate in full-duplex mode.

The utility model relates to a kind of compatible double-architecture radio frequency front-end architecture, to improve the flexibility and compatibility of radio frequency system under different working modes;The architecture includes radio frequency front-end module, and radio frequency front-end module contains transmitting and receiving port, radio frequency switch port, low noise amplifier, power amplifier, first radio frequency switch, second radio frequency switch, antenna port and front-end transmitting port;Low noise amplifier is connected with transmitting and receiving port, and signal is amplified under receiving mode;First radio frequency switch is connected low noise amplifier with power amplifier, according to working mode switching signal path, avoid low noise amplifier and power amplifier work simultaneously;Second radio frequency switch connects power amplifier with antenna port, and signal transmission is to antenna;Front-end transmitting port sends signal through power amplifier.

A phase change material switching circuit may be provided by forming a semiconductor circuit including a power amplifier and a low noise amplifier on a substrate; forming metal interconnect structures embedded in first dielectric material layers over the power amplifier and the low noise amplifier; forming a first phase change material (PCM) switch and a second PCM switch over the first dielectric material layers, wherein the first PCM switch includes a first electrode and a second electrode, and the second PCM switch includes a third electrode and a fourth electrode, wherein the second electrode is electrically connected to the third electrode to form a common electrical node; and electrically connecting a radio-frequency (RF) antenna to the common electrical node.

The invention provides a low-noise amplifier and a chip wherein the low-noise amplifier comprises: a cascade amplification module, which comprises N cascade amplification units and amplifies and outputs an input signal under the action of each stage of bias signal, N being a natural number greater than 1; the active bias module is used for providing a corresponding bias signal for a first-stage amplification unit in the cascade amplification module; the control logic module takes the power supply voltage or the ground voltage as the output voltage based on the control signal; and the resistance voltage division module is connected with the control logic module and is used for carrying out resistance voltage division on the output voltage and providing corresponding bias signals for the second-stage amplification unit to the Nth-stage amplification unit in the cascade amplification module. According to the low noise amplifier and the chip provided by the invention, the problem that a traditional structure has a current abnormal phenomenon under a high-temperature condition is solved.