Abstract: Wireless circuitry may include a radio-frequency amplifier configured to receive a power supply voltage, a load modulation circuit configured to generate a load control signal, and supply voltage error compensation circuitry configured to generate an error signal that is applied to the load control signal to produce a compensated load control signal. The compensated load control signal can be used to tune an adjustable load component of the radio-frequency amplifier. The power supply voltage may exhibit a piecewise constant waveform. The supply voltage error compensation circuitry can include a reference signal generator configured to generate a reference signal and a filter configured to generate a target signal based on the reference signal. The error signal can be computed based on a difference between the target signal and a sensed or estimated version of the power supply voltage received at the amplifier.

Abstract: An electronic device may include wireless circuitry. The wireless circuitry may include a radio-frequency amplifier having a data input configured to receive a radio-frequency signal generated from a baseband signal, supply modulation blocks configured to output a power supply voltage, derived from the baseband signal, for powering the radio-frequency amplifier, and load modulation blocks configured to output a load control signal, derived from the baseband signal and a bandwidth reduced envelope signal output from the supply modulation circuitry, for tuning an adjustable load component of the radio-frequency amplifier. The supply modulation blocks can include a full envelope generator, a bandwidth reduction block for outputting the bandwidth reduced envelope signal, an envelope shaping block, and an envelope tracker. The load modulation blocks can include an inverse amplifier gain model and a load shaping block.

Abstract: A battery pack has a closed housing with an inner receiving space for several battery cells. The housing has a general basic shape with first and second side walls. The side walls of the housing are made of a heat-conducting material. The inner surfaces of the side walls limit the receiving space. In order to create a thermally balanced battery pack, a cell assembly including several battery cells is accommodated in the receiving space. A battery cell has flat sides and edge sides. The battery cells lie with their flat sides stacked next to each other such that there are outer battery cells and inner battery cells. The outer battery cells rest with their flat sides in a flat and heat-transferring manner against the inner surfaces of the first side walls of the housing, and the inner battery cells are heat-transferring to the outer battery cells of the cell assembly.

Abstract: A battery pack for exchangeable insertion into a receiving compartment delimited by an inner wall has a housing accommodating battery cells. The housing has a basic shape with an upright side and first and second end walls opposite each other. The upright side extends in upright direction of the housing between the first and second end walls. The upright side has an outer surface and longitudinal ribs arranged thereon and extending in upright direction. The longitudinal ribs have a height measured in upright direction and are positioned at a distance from each other. The distance is measured transversely to the upright direction. The longitudinal ribs delimit together with the outer surface of the upright side a cooling groove extending in upright direction. The longitudinal ribs are designed along the height such that the cooling groove can delimit, together with the inner wall, a cooling channel extending in upright direction.