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WO/2019/228638A1 |
A method of a wireless transmitter is disclosed. The method is for mitigation of distortion caused by non-linear hardware components of the transmitter, wherein mitigation of distortion comprises mitigating at least one intermodulation c...
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WO/2019/228619A1 |
The present disclosure relates to an amplifier arrangement (1) comprising a first amplifier (2), a second amplifier (6) and an output combiner (10) arranged to combine respective output signals of the first amplifier (2) and the second a...
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WO/2019/222789A1 |
A method includes performing by a processor: estimating a total cathode space current for a thermionic vacuum tube having at least one grid and a plate, such that at least one amplification factor associated with the at least one grid is...
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WO/2019/227020A1 |
Disclosed are digital predistortion implementations, including a method that includes collecting data for a wireless device with a transmit chain that includes at least one power amplifier that produces output with non-linear distortions...
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WO/2019/226878A1 |
Disclosed are systems, devices, modules, methods, and other implementations, including a method for digital predistortion that includes receiving, by a digital predistorter, a first signal that depends on amplitude variations based on an...
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WO/2019/223561A1 |
A highly linear time amplifier with power supply rejection. In a reset stage, the threshold value of a threshold detector is used to reset an output node of an amplifier. The impact of power supply voltage changes on the threshold value ...
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WO/2019/221324A1 |
The present invention provides a power oscillator using a GaN power amplifier which is composed of a gallium nitride (GaN) device, and comprises: a GaN power amplifier for amplifying and outputting the power of an input signal; a directi...
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WO/2019/221831A1 |
An apparatus includes an amplifier circuit and a protection circuit. The amplifier circuit may be configured to generate an output signal by amplifying an input signal received at an input port. The input signal may be a radio-frequency ...
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WO/2019/221175A1 |
An amplifier circuit (1) according to the present invention is provided with: an FET (10) which has a source terminal (S1), a drain terminal (D1) and a gate terminal (G1); an FET (20) which has a source terminal (S2), a drain terminal (D...
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WO/2019/215968A1 |
This amplifier circuit enhances linearity without reducing gain. The amplifier circuit is provided with a transistor, a load, an impedance element, and a variable current source. The transistor amplifies an input signal. The load is conn...
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WO/2019/215502A1 |
Various circuitry may benefit from appropriate matching. For example, certain low noise broadband amplifiers may benefit from resistive matching.
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WO/2019/217472A1 |
An amplifier system with high gain, compact size, and extended bandwidth is disclosed. The amplifier system includes one or more inputs configured to receive one or more input signals and a pre-driver configured to receive the one or mor...
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WO/2019/215281A1 |
The present invention relates to a circuit arrangement comprising an analogue amplifier electrically connected to a first end of an inductive load. Further at least one electrical switch is electrically connected to a second end of the i...
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WO/2019/217811A1 |
A pre-distorter that both accurately compensates for the non-linearities of a radio frequency transmit chain, and that imposes as few computation requirements in terms of arithmetic operations, uses a diverse set of real- valued signals ...
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WO/2019/217372A1 |
A multi-level supply modulator for RF power amplifiers requires only a single independent voltage supply along with one or more flying capacitors to achieve multiple output levels. The flying capacitor is used to store the intermediate v...
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WO/2019/215095A1 |
A Class-D amplifier for generating a driver signal from a multi-bit input signal comprises a digital pulse-width modulation (PWM), stage (DPWM) that is configured to generate a PWM signal (PWMA, PWMB) from the multi-bit input signal and ...
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WO/2019/211156A1 |
The present invention relates to an isolation amplification circuit which comprises an input stage circuitry and a control circuitry stage interconnected through a galvanic isolation barrier. The input stage circuitry comprises a first f...
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WO/2019/205629A1 |
An amplification circuit and a rectifying antenna. The amplification circuit comprises: a first rectifying circuit (20), which is configured to output a first direct current signal according to an alternating current signal; a second rec...
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WO/2019/209604A1 |
According to one embodiment, a transmit/receive (T/R) switch includes a transmit switch, between a transmit port and an antenna port, a receive switch, between a receive port and the antenna port, a transmit inductor, coupled in parallel...
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WO/2019/208371A1 |
An amplifier circuit (10) according to the present invention amplifies an input signal that is a high-frequency signal. This amplifier circuit (10) is provided with: an amplifier (40) to which an input signal and a vias voltage are appli...
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WO/2019/207700A1 |
Conventional Doherty amplifiers require a load modulation line having an electrical length corresponding to 90 degrees, a frequency compensation line having an electrical length corresponding to an integral (n) multiple of 180 degrees, a...
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WO/2019/209724A1 |
An output driver (600) with programmable single-ended and differential outputs includes a first switch (Ml), a first output attenuator, and a programmable attenuator. The first switch (Ml) is coupled in a shunt configuration to a first p...
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WO/2019/205171A1 |
An embodiment of the present application relates to the technical field of circuits, and provided thereby are a radio frequency receiver, a radio frequency transmitter, and a communication device, which may reduce resources consumed for ...
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WO/2019/206881A1 |
The amplifier load current cancellation in a current integrator comprises applying an input current (Ιin) to an operational transconductance amplifier provided with an integration capacitor (Cint) for current integration, leading an out...
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WO/2019/207476A1 |
The invention relates to a system and a method of baseband linearisation (2) for a class G radiofrequency power amplifier (3), said linearisation system (2) comprising a module for selecting the amplifier power supply voltage (11), a dig...
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WO/2019/206550A1 |
An inverter circuit arrangement that connects an IO-link master with a slave comprises an AB class transistor circuit (Qnc2, Qpc2) of which the currents are replicated by a current mirror (Qpo1, Qno1, Qpo2, Qno2) to a terminal of the sla...
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WO/2019/207098A1 |
A microwave amplifier having a load network which provides more efficient amplification of a low power microwave frequency signal. The amplifier comprises a transistor and a load network coupled to the transistor output to shape a wavefo...
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WO/2019/202631A1 |
The present invention relates to a high-frequency power amplifier in which mainly an amplification GaN chip and a GaAs chip on which a pre-match circuit for the amplification GaN chip is formed are connected by wires on the same metal pl...
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WO/2019/200532A1 |
Radio frequency power amplifier with harmonic control circuit as well as method for manufacturing the same are disclosed. According to an embodiment, a radio frequency power amplifier includes: a planar dielectric substrate (60), a first...
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WO/2019/192054A1 |
The present invention relates to a digital predistortion power amplifier calibration method and system and a digital predistortion apparatus. The digital predistortion power amplifier calibration method comprises: acquiring, according to...
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WO/2019/190526A1 |
An apparatus can include tracking circuitry coupled to a current source and configured to generate a reference voltage signal based on a reference current signal from the current source. The apparatus can include voltage regulator circui...
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WO/2019/186229A1 |
A method and transmitter for a Doherty power amplifier are provided. According to one aspect, a radio transmitter includes, for each carrier frequency, a filter, a main path and a peak path. The filter suppresses signals outside the sele...
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WO/2019/190669A1 |
A system and method for pre-distorting a digital signal in a digital communications system. The method includes converting digital bits to be transmitted to a series of symbols defining the bits and providing the symbols to a pulse shapi...
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WO/2019/190543A1 |
A radio-frequency (RF) amplifier circuit facilites carrier-aggregation (CA) operation in a wireless communication network. A first amplifier subcircuit is coupled to an input node, and a second amplifier subcircuit is coupled to the inpu...
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WO/2019/187262A1 |
A digital transmitter includes baseband interfaces to generate digital baseband signals with baseband frequencies, digital-upconverting stages to upconvert the baseband frequencies to first radio frequencies having a predetermined freque...
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WO/2019/190515A1 |
Systems, methods, and circuitries are disclosed to determine parameters for predistortion circuitry in a transceiver including a transmit chain and a receive chain. In one example, a method includes providing a training signal to a power...
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WO/2019/183194A1 |
A bi-directional amplifier (BDA) comprises a first pair of amplifier transistors and a second pair of amplifier transistors, wherein the first pair of amplifier transistors are cross-coupled with the second pair of amplifier transistors,...
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WO/2019/180520A1 |
The invention relates to a method for automatically adjusting a multiple-input-port and multiple-output-port tuning unit. The invention also relates to an apparatus for radio communication using this method. An apparatus for radio commun...
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WO/2019/181522A1 |
This acoustic apparatus (1) comprises a network interface (103), an amplifier (109) that amplifies an audio signal received via the network interface (103), and a transmission unit (150) that receives an output value from the amplifier (...
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WO/2019/179487A1 |
Disclosed in the present invention are a balanced radio frequency power amplifier, a chip and a communication terminal. The radio frequency power amplifier divides, by means of a 90-degree power splitter unit, a radio frequency input sig...
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WO/2019/180091A1 |
A transimpedance amplifier (100) for converting a current between its two input terminals (132, 134) to a voltage over its two output terminals (112, 114) comprising a high-speed level shifter (140) configured for creating a difference i...
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WO/2019/179797A1 |
The invention provides for a magnetic resonance imaging system (100, 300, 500) with a gradient coil system (110, 112, 113) that comprises a set of gradient coils (110) configured for generating a gradient, a gradient coil amplifier (112)...
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WO/2019/174051A1 |
A method for compensating memory effects in a power amplifier comprises obtaining (S10) of an original signal. A variation of power of the original signal with time is determined (S12). The original signal is predistorted (S14) for memor...
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WO/2019/177806A1 |
A predictive brownout prevention system may be configured to prevent brownout of an audio output signal. Particularly, the brownout prevention system may be configured to receive information indicative of adaptive estimates of power supp...
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WO/2019/174179A1 |
A switching-mode power amplifier includes a driver circuit having an input for receiving a radio frequency (RF) signal, an output for outputting a digital output signal, and a bias port for receiving a bias signal, and a bias circuit hav...
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WO/2019/176052A1 |
This integrated circuit (50) is provided with: an amplifier (1) which amplifies a current signal from an external light receiving element (9) and converts the amplified current signal to a voltage signal; and a low-pass filter (10) which...
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WO/2019/177943A1 |
Systems and methods for a tunable impedance are provided. A tunable impedance includes a transistor assembly having two terminals and a control input. The transistor assembly includes one or more transistors electrically connected betwee...
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WO/2019/176015A1 |
This amplifier is configured as follows: a first capacitor (10) resonates at a secondary harmonic frequency included in a signal output from an amplification element (3); and a circuit that includes a second transmission line (6), the fi...
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WO/2019/172168A1 |
Power consumption is reduced in the present invention by connecting the power supplies of amplifiers for a plurality of channels in cascade to a single power supply voltage. This amplifier circuit 10 comprises a first channel amplifier i...
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WO/2019/173679A1 |
A balanced amplifier (28) can utilize a common mode choke (31) to suppress even harmonics in the signals of the balanced amplifier (28). The common mode choke (31) can be coupled between cascaded balanced amplifier pairs (34, 35, 36, 37)...
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