Aspects of this disclosure relate to compensating for dynamic error vector magnitude. A compensation circuit can generate a compensation signal based at least partly on an amount of time that an amplifier, such as a power amplifier, is turned off between successive transmission bursts of the amplifier. For example, the compensation circuit can charge a capacitor based at least partly on an amount of time that the amplifier is turned off between successive transmission bursts and generate the compensation signal based at least partly on an amount of charge stored on the capacitor. A bias circuit can receive the compensation signal, generate a bias signal based at least partly on the compensation signal, and provide the bias signal to the amplifier to bias the amplifier.

A wide bandpass filtering power amplifier using discriminating coupling is disclosed, which comprises a DC bias circuit, an input impedance matching circuit, a transistor and an output impedance matching circuit. The DC bias circuit is connected to the input impedance matching circuit which is further connected to the transistor, and the transistor is further connected to the output impedance matching circuit which comprises a tuning microstrip line and a bandpass filter. The complexity and the area of the impedance matching circuit in the power amplifier are effectively reduced. At the same time, the filtering PA has good frequency selectivity by using the discriminating coupling BPF. Meanwhile the work efficiency and bandwidth of the filtering power amplifier are effectively improved by taking both of the extended continuous mode theory and filter synthesis theory into account.

A communication device includes a power amplifier that generates power signals according to one or more operating bands of communication data, with the amplitude being driven and generated in output stages of the power amplifier. The final stage can include an output passive network that suppresses suppress an amplitude modulation-to-phase modulation (AM-PM) distortion. During a back-off power mode a bias of a capacitive unit of the output power network component can be adjusted to minimize an overall capacitance variation. A output passive network can further generate a flat-phase response between dual resonances of operation.

A power amplifier includes a two-dimensional matrix of NM active cells formed by stacking main terminals of multiple active cells in series. The stacks are coupled in parallel to form the two-dimensional matrix. The power amplifier includes a driver structure to coordinate the driving of the active cells so that the effective output power of the two-dimensional matrix is approximately NM the output power of each of the active cells.

An RF power amplifier includes an input coupler including a first resistor and a first capacitor, an input phase difference network of the input coupler including a first input direct current (DC) bias injection network and a second capacitor connected in series with the first resistor. The second capacitor increases a bandwidth of the RF power amplifier. The RF power amplifier may further include a first power amplifier and a second power amplifier. The first input DC bias injection network provides power to the first power amplifier and the second power amplifier. The RF power amplifier includes a lateral dimension narrower than a lateral dimension of an RF power amplifier comprising bias circuitry on two opposing sides.

Methods and apparatuses for facilitating wide bandwidth power amplification with high efficiency for analog RF signals. A passive load modulated balanced amplifier (LMBA) device comprises a balanced power amplifier (BPA) and a directional coupler. The BPA comprises a first power amplifier (PA) configured to amplify a first portion of an input power, a second PA configured to amplify a second portion of the input power, an isolation port, and an output port that outputs the amplified first and second portions of the input power as an output power. The directional coupler is configured to provide a portion of the output power from the output port to the isolation port to modulate a load impedance of the first and second PAs.

An amplifier typically exemplified by a TIA is realized that provides an optimal band characteristic, that reduces the possibility of the oscillation, and that achieves a reduced dispersion of the band characteristics. An amplifier for amplifying an electric signal, comprising: a first buffer for amplifying the electric signal; a filter that is connected to an output of the first buffer and that includes a parallel circuit consisting of an inductor and a first capacity; and a second buffer connected to an output of the filter.

A power amplifier control method is disclosed. A phase modulation control signal may be generated according to an envelope signal that is output by a baseband unit. The phase modulation may be performed on a signal of a main power amplifier link and/or an auxiliary power amplifier link in the Doherty power amplifier circuit according to the phase modulation control signal, so that a phase difference between the signal of the main power amplifier link and the signal of the auxiliary power amplifier link after the phase modulation is a specified value corresponding to a current value of the envelope signal, where the specified value is an optimal phase value of a Doherty power amplifier circuit when the supply voltage of the Doherty power amplifier circuit is an envelope voltage corresponding to the current value of the envelope signal. High-efficiency power amplifier technology is realized.

An electronic device may include wireless circuitry having one or more radio-frequency amplifiers coupled to differential coupled lines. The differential coupled lines may provide routing and impedance matching for the radio-frequency amplifiers with minimal power loss. The differential coupled lines may include a first pair of coupled lines and a second pair of coupled lines. The first pair of coupled lines may include a first conductive routing path coupled to a first voltage line and a second conductive routing path routed along the first conductive routing path and coupled to a second voltage line. The second pair of coupled lines may include a third conductive routing path coupled to the first voltage line and a fourth conductive routing path routed along the third conductive routing path and coupled to the second voltage line.

A communication device includes a power amplifier that generates power signals according to one or more operating bands of communication data, with the amplitude being driven and generated in output stages of the power amplifier. The final stage can include an output passive network that suppresses suppress an amplitude modulation-to-phase modulation (AM-PM) distortion. During a back-off power mode a bias of a capacitive unit of the output power network component can be adjusted to minimize an overall capacitance variation. An output passive network can further generate a flat-phase response between dual resonances of operation.