A filter device configured to directly connect to a differential power amplifier of a transmit chain circuit. The filter device may include a transformer and a filter configured as a half lattice equivalent topology and having a single-ended output. The filter may be a lattice filter configured as a full lattice topology or a lattice equivalent filter configured as a half lattice equivalent topology. The filter includes a first branch having a first impedance network of one or more first impedance elements and a second branch having a second impedance network of one or more second impedance elements. The single-ended output of the filter device may connect to an antenna switch that is in turn connected to an antenna.

A radio frequency (RF) transistor amplifier package includes a submount, and first and second leads extending from a first side of the submount. The first and second leads are configured to provide RF signal connections to one or more transistor dies on a surface of the submount. At least one rivet is attached to the surface of the submount between the first and second leads on the first side. One or more corners of the first side of the submount may be free of rivets. Related devices and associated RF leads and non-RF leads are also discussed.

An electronic device may include: at least one communication processor, an RFIC, at least one power amplifier , and at least one converter and wherein the at least one communication processor is configured to: set a driving voltage, to be applied to a first power amplifier for amplifying a first RF signal provided from the RFIC among the at least one power amplifier, to be a first voltage, based on an APT mode, control at least part of the at least one converter to provide a first voltage, set based on the APT mode, to the first power amplifier during a transmission period of the first RF signal, and control at least part of the at least one converter to provide the first voltage to the first power amplifier during at least partial period of a remaining period in which no RF signal is transmitted, based on the occurrence of an event associated with audible noise.

A Doherty power amplifier comprising: an input configured to receive an input signal to be amplified and to split the input signal into a first portion and a second portion, the input signal having an operating frequency; a carrier amplifier path coupled to the input to receive the first portion, the carrier amplifier path including a carrier amplifier coupled to a differential inverter, the carrier amplifier being configured to amplify the first portion and provide an amplified first portion to the differential inverter, the differential inverter having a capacitance configured to make the differential inverter behave as a short circuit at odd harmonics of the operating frequency, the capacitance coupling a first path and a second path of the differential inverter in parallel; and a peaking amplifier path coupled to the input to receive the second portion and comprising a peaking amplifier configured to amplify the second portion.

Fast envelope tracking systems are provided herein. In certain embodiments, an envelope tracking system for a power amplifier includes a switching regulator and a differential error amplifier configured to operate in combination with one another to generate a power amplifier supply voltage for the power amplifier based on an envelope of a radio frequency (RF) signal amplified by the power amplifier. The envelope tracking system further includes a differential envelope amplifier configured to amplify a differential envelope signal to generate a single-ended envelope signal that changes in relation to the envelope of the RF signal. Additionally, the differential error amplifier generates an output current operable to adjust a voltage level of the power amplifier supply voltage based on comparing the single-ended envelope signal to a reference signal.

A power supply switch circuit includes a switch circuit including a first switch configured to switch a first power source voltage to a power supply terminal of a power amplifier, and a second switch configured to switch a second power source voltage to the power supply terminal; a switch controller configured to control the switch circuit; and a power supply circuit configured to supply a third power source voltage to the power supply terminal when a first voltage of the power supply terminal is lower than a predetermined second voltage.

A semiconductor device includes a substrate, an active region provided in the substrate, a plurality of gate fingers provided on the active region, extending in an extension direction, and arranged in an arrangement direction orthogonal to the extension direction, and a gate connection wiring commonly connected to the plurality of gate fingers and provided between the plurality of gate fingers and a first side surface of the substrate, wherein when viewed from the arrangement direction, a first position where a first end of a first gate finger as a part of the plurality of gate fingers is connected to the gate connection wiring is closer to the first side surface than a second position where a first end of a second gate finger as another part of the plurality of gate fingers is connected to the gate connection wiring.

An antenna controller for an antenna is configured to request and receive status information comprising power amplifier data of at least two adjustable power amplifiers. The antenna controller is configured to determine at least one target setting for the at least two adjustable power amplifiers based on the received power amplifier data, and to send the at least one target setting for the at least two adjustable power amplifiers. Hereby it is made possible for an antenna controller to set an overall target for multiple adjustable power amplifiers of the antenna. This in turn makes it possible to make the settings for the adjustable power amplifiers such that the transmission signal becomes linearized by a shared digital pre-distorter when transmitting using the multiple adjustable power amplifiers of the antenna. A Radio Frequency Integrated Circuit controller for an antenna subarray is configured to control at least one adjustable power amplifier.

An electronic device may include wireless circuitry with a baseband 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 is operable in a non-carrier-aggregation mode and a carrier aggregation mode. The amplifier circuitry may include an input transformer that is coupled to multiple amplifier stages such as a common gate amplifier stage, a cascode amplifier stage, and a common source amplifier stage. The common gate amplifier stage may include switches for selectively activating a set of cross-coupled capacitors to help maintain input impedance matching in the non-carrier-aggregation mode and the carrier-aggregation mode. The common source amplifier stage may include additional switches for activating and deactivating the common source amplifier stage to help maintain the gain in the non-carrier-aggregation mode and the carrier-aggregation mode.

Systems and method for improving operation of a radio frequency system are provided. One embodiment includes a switching power amplifier that outputs an amplified analog electrical signal based on an input electrical signal and voltage of an envelope voltage supply rail. The switching power amplifier includes a first transistor with a gate that receives the input electrical signal, a source electrically coupled to the envelope voltage supply rail, and a drain electrically coupled to an output of the switching power amplifier; a second transistor with a gate that receives the input electrical signal, a source electrically coupled to ground, and a drain electrically coupled to the output; and a third transistor with a gate that receives the input electrical signal, a drain electrically coupled to the envelope voltage supply rail, and a source electrically coupled to an output of another switching power amplifier.