An apparatus of a transmitter and method are provided, the apparatus comprising a processor that calculates a supply voltage (SV) value (SVV) to provide as an SV for a power amplifier (PA) of the transmitter for transmissions during a transmission time slot (TS). When the SV<an envelope tracking (ET) threshold (ETT), then the processor configures the PA to transmit a signal in an average power tracking (APT) mode that maintains the SV at the SVV during the TS. When the SV≥ETT, and an APT condition is met, then the processor configures the PA to transmit the signal in the APT mode. When the SV≥ETT, and the APT condition is not met, then the processor transmits by an adjustment to the SVV to track an amplitude modulation envelope during the TS in an ET mode.

The present disclosure relates to a 5th generation (5G) or pre-5G communication system for supporting a data transmission rate higher than that of a 4th generation (4G) communication system such as long term evolution (LTE). The present disclosure is to amplify transmission signals in a wireless communication system, and a transmitting device may include an antenna array including a plurality of antenna elements, a plurality of amplification chains for amplifying signals transmitted through the plurality of the antenna elements, and a power supply line for supplying powers to the plurality of the amplification chains. Herein, the powers used by power amplifiers included in at least one amplification chain of the plurality of the amplification chains may be divided by filtering or by independent pads and branch-lines.

A speaker excursion characterizing system for a speaker includes a signal generator configured to generate a signal at a plurality of different amplitudes. The signal may be generated at a plurality of frequencies. An inverse excursion filter has an inverse excursion filter response, receives the signal and applies the inverse excursion filter response and has an output in communication with an amplifier circuit of the speaker. The inverse excursion filter response is an inverse of an excursion filter response of an excursion filter in the amplifier circuit of the speaker.

Various methods and circuital arrangements for biasing one or more gates of stacked transistors of an amplifier are presented, where the amplifier can have a varying supply voltage. According to one aspect, the gate of the input transistor of the amplifier is biased with a fixed voltage whereas the gates of the other transistors of the amplifier are biased with variable voltages that are linear functions of the varying supply voltage. According to another aspect, the linear functions are such that the variable voltages coincide with the fixed voltage at a value of the varying supply voltage for which the input transistor is at the edge of triode. According to another aspect, biasing of the stacked transistors is such that, while the supply voltage varies, the drain-to-source voltage of the input transistor is maintained to a fixed value whereas the drain-to-source voltages of all other transistors are equal to one another.

A Doherty amplifier including a main amplifier and a peak amplifier is mounted on a package substrate. A low noise amplifier is further mounted on the package substrate. A transmit/receive switch switches in terms of time between a transmission connection state in which an output signal of the Doherty amplifier is supplied to an antenna and a reception connection state in which a signal received by the antenna is inputted to the low noise amplifier.

Amplification device and processes capable of miniaturization in a device for performing linear amplification and switching amplification operations on incoming signals are provided. The amplifying device includes a first amplifying unit for amplifying an input signal and outputting a first output signal, the input switch unit connected in parallel with the first amplifying unit for performing a switching operation by an input signal and outputting a switch output signal, and a second amplifying unit for amplifying a first output signal or a switch output signal and outputting a second output signal, and the first amplifying unit or the input switch unit operates based on the type of the input signal.

According to various embodiments of the present disclosure, an electronic device may comprise: a transceiver; a power amplifier connected to the transceiver; a power source modulator configured to supply power to the power amplifier; at least one antenna connected to the power amplifier; and at least one processor operably connected to the transceiver, the power amplifier; and the power source modulator. The at least one processor may confirm whether the state of an uplink signal transmitted through the at least one antenna is a first state, and may control the power source modulator to add a first offset value to a voltage value of power supplied to the power amplifier from the power source modulator, based on the state of a downlink signal received to the transceiver being the first state.

An electronic device is provided. The electronic device includes an earphone including a first impedance component, a signal generator configured to output a first alternating current (AC) signal, a first circuit including at least one first analog device having an impedance component electrically coupled to the first impedance component, and configured to receive the first AC signal and output a first detection signal including a voltage component corresponding to the first impedance component, and at least one processor configured to generate at least one piece of biometric information, based on the first detection signal, and output the at least one piece of biometric information.

An envelope tracking integrated circuit having a tracker circuitry configured to generate a modulated supply voltage for a radio frequency power amplifier in response to an envelope of a radio frequency signal to be amplified by the radio frequency power amplifier is disclosed. Also included is a charge pump system configured to generate a tracker supply voltage for the tracker circuitry. Further included is an analog multiplexer configured to receive the tracker supply voltage and a battery source voltage and output a selected one of the tracker supply voltage and the battery source voltage in response to a voltage select signal. A digital processor further included in the envelope tracking integrated circuit is configured to control portions of the tracker circuitry and be powered by the selected one of the tracker supply voltage and the battery source voltage during transmission gaps when the radio frequency signal is not transmitted.

A high-frequency signal processing apparatus and a wireless communication apparatus can achieve a decrease in power consumption. For example, when an indicated power level to a high-frequency power amplifier is equal to or greater than a second reference value, envelope tracking is performed by causing a source voltage control circuit to control a high-speed DCDC converter using a detection result of an envelope detecting circuit and causing a bias control circuit to indicate a fixed bias value. The source voltage control circuit and the bias control circuit indicate a source voltage and a bias value decreasing in proportion to a decrease in the indicated power level when the indicated power level is in a range of the second reference value to the first reference value, and indicate a fixed source voltage and a fixed bias value when the indicated power level is less than the first reference value.