The present invention provides an RF power amplifier architecture which with dynamic digital control of the amplification by incorporating digitized RF input and output signal envelope data and environmental temperature sensor(s) readings into an arbitrary control algorithm implemented on a digital processor. Via the combination of digitally controlled DC/DC converter and a D/A converter, the quiescent bias of the power FET of the RF output stage can become a realization of virtually any function of the feedback and input data.

An electronic device is provided. The electronic device includes a communication module and a processor electrically connected to the communication module, wherein the communication module includes an antenna configured to transmit and receive a communication signal, a sensor configured to measure an impedance of the antenna, and a first matching circuit and a second matching circuit electrically connected to the antenna, and the processor is configured to receive information on the impedance of the antenna from the sensor, check control information on at least one of the first matching circuit and second matching circuit corresponding to the impedance of the antenna at least partially based on the received information on the impedance of the antenna, and transmit control information generated at least partially based on the checked control information to at least one of the first matching circuit and the second matching circuit corresponding to the control information.

A method for digital predistortion (DPD) calibration in a wireless communication device is provided that includes transmitting, by transmission circuitry of the wireless communication device, a plurality of pulses, where each pulse corresponds to an amplitude step in a pattern of amplitude steps, where the amplitude steps are separated by silence gaps, receiving each pulse in receiver circuitry of the wireless communication device, generating, by an accumulator component of the wireless communication device, an accumulated sample for each pulse based on a plurality of samples output by the receiver circuitry for the pulse, and computing, by a processor of the wireless communication device, amplitude dependent gain (AM/AM) and amplitude dependent phase shift (AM/PM) values for each accumulated sample.

A low-noise amplifier device includes an inductive input element, an amplifier circuit, an inductive output element and an inductive degeneration element. The amplifier device is formed in and on a semiconductor substrate. The semiconductor substrate supports metallization levels of a back end of line structure. The metal lines of the inductive input element, inductive output element and inductive degeneration element are formed within one or more of the metallization levels. The inductive input element has a spiral shape and the an amplifier circuit, an inductive output element and an inductive degeneration element are located within the spiral shape.

A vehicular audio-amplifier controller includes: a delay buffer that stores a sound signal supplied from a signal source; a first processing unit that applies an absolute value process to the supplied sound signal; a second processing unit that applies a low-pass filter process and an offset process to a processing result of the first processing unit; a power supply controller that performs control to change a voltage value of a vehicular power supply according to at least a signal value processed by the second processing unit and a type of the signal source; and a sound signal output unit that outputs a sound signal stored in the delay buffer with only a delay time that is determined based on a power supply control process time of the power supply controller.

A radio frequency power amplifier (RF PA) apparatus includes a first RF PA, a second RF PA, and a controller. The first RF PA is configured to deliver RF power to a load over a first range of RF power levels. The second RF PA is configured to deliver RF power to the load over a second range of RF power levels greater than the first range of RF power levels. The controller controls whether the first RF PA is delivering RF power to the load or the second RF PA is delivering RF power to the load, and is further configured to coordinate and control handoffs between the first and second RF PAs by varying magnitudes of input RF voltages applied to the RF input ports of the first and second RF PAs or by varying magnitudes of input bias voltages applied to the RF input ports of the first and second RF PAs.

A remote radio head unit (RRU) system for multiple operating frequency bands, multi-channels, driven by a single or more wide band power amplifiers. More specifically, the present invention enables multiple-bands RRU to use fewer power amplifiers in order to reduce size and cost of the multi-band RRU. The present invention is based on the method of using duplexers and/or interference cancellation system technique to increase the isolation between the transmitter signal and receiver signal of the RRU.

An industrial control I/O module for interfacing with industrial control equipment, such as sensors and actuators, can be configured to dynamically provide differing resistances in each channel as may be required for reliably achieving particular modes of operation in the channel. Providing differing resistances in such channels flexibly allows different modes in the channel to provide universal I/O capability. Modes of operation could include, for example, digital output, digital input, analog output, analog input and the like, in the same channel, but at different times. In one aspect, a processor or voltage divider can be used to control an amplifier, with feedback, driving a transistor in a channel to dynamically adjust resistance in the channel by selectively biasing the transistor to achieve a resistance in the channel suitable for the selected mode.

The use of a capacitor (22) to serve as the principal impedance in a negative feed-back loop in a voltage amplifier component (21) of a trans-impedance amplifier and actively controlling the amount of charge accumulated within the capacitor appropriately to improve the responsiveness and/or dynamic range of the amplifier. A switch (25) is electrically coupled to the inverting input terminal of the voltage amplifier and electrically isolated from the output terminal (23) of the voltage amplifier. The output voltage of the amplifier is proportional to the accumulation of charge, and the switch is operable to ‘reset’ the charge/voltage on the feedback capacitor, as desired. This arrangement decouples the structure of the switch from the output port of the voltage amplifier, and so avoids leakage currents and/or interfering voltage signals emanating from the switch structure and being felt at the output port of the voltage amplifier.

Control device for aerosol inhalation device, includes operational amplifier including output terminal configured to generate voltage according to voltage applied to load configured to heat aerosol source and having correlation between temperature and electrical resistance value, control unit including input terminal and configured to perform processing based on voltage applied to the input terminal, and voltage dividing circuit configured to electrically connect the output terminal of the operational amplifier and the input terminal of the control unit. Power supply voltage of the operational amplifier is higher than power supply voltage of the control unit, and equals voltage applied to aerosol generation circuit including the load, and one of inverting input terminal and noninverting input terminal of the operational amplifier is electrically connected to the aerosol generation circuit.