19results about "Amplifier details to increase power/efficiency" patented technology

This application relates to a predistortion circuit for a wireless transmitter and a method for generating a predistorted baseband signal. Specifically, the invention discloses a predistortion circuit for a wireless transmitter, comprising a signal input configured to receive a baseband signal. Furthermore, the predistortion circuit includes a predistorter configured to generate a predistorted baseband signal using the baseband signal and a selection of a first predistorter configuration and a second predistorter configuration.

This application relates to methods and apparatus for controlling slew-rate of components for outputting an analogue output signal. Described is a signal processing circuit having a forward signal path for receiving an input signal and outputting an analogue output signal. The signal processing circuit has a first component located in said forward signal path for outputting the analogue output signal. A predictor is configured to predict a required slew-rate for the first component based on the input signal and a controller is configured to controllably vary an output slew-rate limit of the first component based on the prediction of required slew-rate.

A power amplifier circuit including a plurality of analog power amplifiers configured to generate a output power for an output signal; at least one processor configured to: select a highest output power signal; determine an input signal power of a modulated signal; determine an output signal power based on the input signal power; compare the output signal power and the highest output power; and disable a subset of the plurality of analog power amplifiers based on the comparison, wherein a remainder of the plurality of analog power amplifiers are configured to generate the output signal power.

Circuits and methods for reducing the cost and / or power consumption of user terminals and / or gateways in telecommunications systems (550) that may include telecommunications satellites. Embodiments generate a dynamic input bias signal based on the information signal envelope (which may be pre-distorted) applied to the signal input of a power amplifier (PA), thereby reducing average power consumption. Other embodiments include dynamic linearization (518) of the information signal, and / or variations in the supply voltage to the power amplifier (PA) based on the information signal envelope. Another aspect is a multi-stage “chain” feedback regulated power supply circuit for providing two or more output voltages, which can be used as alternative supply voltages to the power amplifier (PA).

A predistortion circuit for a wireless transmitter includes a signal input configured to receive a baseband signal. Further, the predistortion circuit includes a predistorter configured to generate a predistorted baseband signal using the baseband signal and a select of one of a first predistorter configuration and a second predistorter configuration.

Circuits and methods for reducing the cost and / or power consumption of a user terminal and / or the gateway of a telecommunications system (550) that may include a telecommunications satellite. Embodiments generate a dynamic input bias signal based upon an information signal envelope (which may be pre-distorted) which is applied to the signal input of a power amplifier (PA), thus reducing average power consumption. Other embodiments further include dynamic linearization (518) of the information signal, and / or variation of the supply voltage to the power amplifier (PA) as a function of the envelope of the information signal. Another aspect is a multi-stage "chained" feedback regulated voltage supply circuit for providing two or more output voltages that may be used as alternative supply voltages to a power amplifier (PA).

A communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT) are provided. The disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. An amplifier includes a first transistor for amplifying the fundamental signal applied to a gate terminal. and a second transistor having a source terminal electrically connected to the drain terminal of the first transistor and a drain terminal electrically connected to a bias voltage. The current flowing through the second transistor may be determined based on the current flowing in the drain terminal of the first transistor.

A power amplifier output stage includes a first output array group having a first plurality of semiconductor devices, and a first loading adjustment module coupled to the first output array group. The first loading adjustment module is configured to adjust a loading of the first output array group to produce a first power dissipation value associated with the first output array group. The power amplifier output stage further includes a second output array group having a second plurality of semiconductor devices, and a second source loading adjustment module coupled to a second input of the second output array. The second source loading adjustment module is configured to adjust a source loading of the second output array group to produce a second power dissipation value associated with the second output array group, the first power dissipation value being different from the second power dissipation value.

Circuits and methods for reducing the cost and / or power consumption of a user terminal and / or the gateway of a telecommunications system (550) that may include a telecommunications satellite. Embodiments generate a dynamic input bias signal based upon an information signal envelope (which may be pre-distorted) which is applied to the signal input of a power amplifier (PA), thus reducing average power consumption. Other embodiments further include dynamic linearization (518) of the information signal, and / or variation of the supply voltage to the power amplifier (PA) as a function of the envelope of the information signal. Another aspect is a multi-stage "chained" feedback regulated voltage supply circuit for providing two or more output voltages that may be used as alternative supply voltages to a power amplifier (PA).

A differential amplifier comprises a first differential circuitry structure including a first part comprising at least one branch of transistors and a second part comprising at least one branch of transistors, and a second circuitry structure. The second circuitry structure has a first non-linear device and a second non-linear device. The non-linear devices each comprise a transistor having a control node connected to a differential output terminals of the differential amplifier. A common centre node of the non-linear devices is connected to a control node of one of the transistors of each branch of the first part having a differential output terminal. Amplifier applications, communication devices and network nodes are also disclosed.

The present disclosure relates to a communication system and an output power linearization method thereof. A communication system includes a power amplifier, a receiving filter, an analog-to-digital converter, an output analog circuit and a predistortion circuit. The power amplifier is used to amplify a radio frequency input signal to generate a radio frequency output signal, and the radio frequency input signal is generated based on a baseband signal. The receiving filter is used to receive a feedback signal generated based on the radio frequency output signal and output a filtered feedback signal. The bandwidth of the filtered feedback signal is at least 3 to 5 times the bandwidth of the radio frequency input signal. The analog-to-digital converter is used to convert the filtered feedback signal into a digital input signal. The output analog circuit is used to generate a reference signal that simulates the radio frequency output signal based on the digital input signal and the baseband signal. The predistortion circuit is used to establish a predistortion model based on the reference signal.

The present application discloses a signal distortion pre-correction device and method, system and composite system. The signal distortion pre-correction method comprises: performing time-sharing acquisition of the output signals of multiple channels of a power amplifier module to obtain multiple analog feedback signals; converting the multiple analog feedback signals into multiple digital feedback signals; determining correction parameters according to the multiple digital feedback signals and the input forward signal; and correcting the forward signal based on the correction parameters to obtain a pre-correction signal. The solution provided in this embodiment estimates the correction parameters based on multiple feedback signals, which reduces the requirements for the consistency of the characteristics of each power amplifier in the system, and can well solve the signal distortion pre-correction problem of nonlinear systems in analog beamforming application scenarios.

Disclosed are systems for adjusting bias power provided to a radio-frequency amplifier to one or more figures of merit based on sensed characteristics of the amplifier and / or characteristics of the input or output power.

Circuits and methods for reducing the cost and / or power consumption of a user terminal and / or the gateway of a telecommunications system (550) that may include a telecommunications satellite. Embodiments generate a dynamic input bias signal based upon an information signal envelope (which may be pre-distorted) which is applied to the signal input of a power amplifier (PA), thus reducing average power consumption. Other embodiments further include dynamic linearization (518) of the information signal, and / or variation of the supply voltage to the power amplifier (PA) as a function of the envelope of the information signal. Another aspect is a multi-stage "chained" feedback regulated voltage supply circuit for providing two or more output voltages that may be used as alternative supply voltages to a power amplifier (PA).

A wireless communication system includes a power amplifier (PA) configured to receive a radio frequency (RF) input signal and to produce a PA output signal, the PA output signal being an amplified version of the RF input signal. A sensor subsystem is configured to perform asynchronous statistical sampling of the RF input signal and of the PA output signal and to generate a sensor subsystem output. A controller, in communication with the sensor subsystem, is configured to obtain the sensor subsystem output and to infer performance of the PA, and may control one or more of a plurality of internal PA parameters. The controller may include a neural network processor to associate a particular statistical input / output characterization with a particular inferred performance for the PA. Compared to known approaches, the system is scalable and achieves lower power consumption, and is configured to obtain information about linearity performance.

Provided in the present disclosure are a device, method, and system for signal distortion pre-correction, and a composite system. The device for signal distortion pre-correction comprises: a signal distortion correction network module, a correction parameter trainer, a data collecting module, and a first conversion module. The data collecting module is connected to an external power amplifier module. The data collecting module is configured for the time-division collection of output signals of multiple channels of the power amplifier module and to output multiple analog feedback signals to the first conversion module. The first conversion module is configured to convert the multiple analog feedback signals into multiple digital feedback signals and to transmit to the correction parameter trainer. The correction parameter trainer is configured to determine a correction parameter on the basis of the multiple digital feedback signals and of a forward signal inputted and to output the correction parameter to the signal distortion correction network module. And, the signal distortion correction network module is configured to correct the forward signal on the basis of the correction parameter and then to output a pre-corrected signal.

An envelope tracking (ET) amplifier circuit is provided. The ET amplifier circuit includes an amplifier circuit configured to amplify a radio frequency (RF) signal based on an ET modulation voltage. The ET modulation voltage corresponds to a time-varying voltage envelope, which may not align with the time-varying signal envelope of the RF signal due to inherent time delays in the ET amplifier circuit. Therefore, the amplifier circuit may suffer from degraded linear performance. In this regard, a voltage processing circuit is provided in the ET amplifier circuit, and the voltage processing circuit is configured to operate in a low bandwidth mode and a high bandwidth mode. In the high bandwidth mode, the voltage processing circuit is configured to cause the ET modulation voltage to be modified to help improve the delay tolerance of the ET amplifier circuit. Therefore, the linear degradation of the amplifier circuit can be reduced to a predetermined threshold.

The amplifier includes an input matching network, at least one transistor, an input lead coupled to the at least one transistor, a ground terminal coupled to the transistor, an output lead coupled to the at least one transistor, an output matching circuit coupled to the output lead and the at least one transistor, and a baseband impedance enhancement circuit having at least one reactive element coupled to the input matching network, the baseband impedance enhancement circuit configured to reduce resonance of the baseband termination.

A predistortion circuit for a wireless transmitter includes a signal input configured to receive a baseband signal. Further, the predistortion circuit includes a predistorter configured to generate a predistorted baseband signal using the baseband signal and a select of one of a first predistorter configuration and a second predistorter configuration.