Abstract: An apparatus for amplifying a transmit signal includes a power amplifier module arranged within a transmit path to be coupled to an antenna module. The power amplifier module is configured to amplify a transmit signal. Further, the apparatus includes a coupling module arranged between the power amplifier module and the antenna module. The coupling module is configured to provide a reverse feedback signal substantially generated by a part of the amplified transmit signal reflected by the antenna module. Further, the apparatus includes a determining module configured to determine a delay information on a delay between the transmit path and an envelope tracking path based on at least the reverse feedback signal. Additionally, the apparatus includes a power supply module arranged within the envelope tracking path configured to vary a power supply of the power amplifier module based on a transmit signal envelope information with a temporal alignment depending on the delay information.

Abstract: An apparatus for amplifying a transmit signal comprises a transmit path comprising a power amplifier module to be coupled to an antenna module. The power amplifier module is configured to amplify a transmit signal. Further, the apparatus comprises an envelope tracking path comprising a variable delay module and a power supply module. The variable delay module is configured to vary a signal delay within the envelope tracking path according to a delay control parameter. Further, the apparatus comprises a delay control module configured to provide the delay control parameter based on a current characteristic transmit frequency of the transmit signal.

Abstract: An antenna tuner control system includes an RF path, a lookup table and a state table analysis component. The RF path is configured to generate an RF signal. The lookup table has a state table that correlates antenna states with impedance values. The state table analysis component is configured to generate a tuner control signal from the RF signal using the lookup table.

Abstract: An envelope tracking system and a method for adjusting a nonlinear transfer function of an envelope tracking power supply for a power amplifier are provided. An output signal of the power amplifier is provided to a feedback receiver for determining an actual performance of the envelope tracking power amplifier. An assumed performance of the envelope tracking power amplifier is determined by evaluating the non-linear transfer function at a value defined by an input signal for a transmitter including the power amplifier. A difference between the assumed performance and the actual performance provides a correctional value for the nonlinear transfer function.

Abstract: An envelope tracking system and a method for adjusting a nonlinear transfer function of an envelope tracking power supply for a power amplifier are provided. An output signal of the power amplifier is provided to a feedback receiver for determining an actual performance of the envelope tracking power amplifier. An assumed performance of the envelope tracking power amplifier is determined by evaluating the nonlinear transfer function at a value defined by an input signal for a transmitter including the power amplifier. A difference between the assumed performance and the actual performance provides a correctional value for the nonlinear transfer function.

Abstract: A method for calibrating a supply voltage of an envelope tracking PA (power amplifier) is provided. The method includes obtaining a plurality of calibrated PA supply voltage values using a PA output power sequence having a plurality of different PA output power values. Thereby, an order of the PA output power values of the PA output power sequence is chosen such that a junction temperature of the PA is maintained during calibration within a temperature range that occurs during non-calibration envelope tracking operation.

Abstract: One embodiment of the present invention relates to a system for calibrating of timing between an amplifier input signal and a modulated supply power. The system includes a supply modulation component, an error metric component, and a delay determiner. The supply modulation component provides the modulated supply power and the amplifier input signal according to an input signal and a set delay signal. The error metric component provides information from a transmitted amplitude signal and a received amplitude signal. The delay determiner generates timing adjustments in the form of the set delay signal from the error metric information.

Abstract: In an embodiment, a radio transmitter may be provided. The radio transmitter may include a radio transmitter control loop; and a controller configured in such a way that it operates the radio transmitter control loop as a closed control loop in a first operating mode, and that it operates the radio transmitter control loop as an open control loop in a second operating mode.

Abstract: In an embodiment, a radio transmitter may be provided. The radio transmitter may include a radio transmitter control loop; and a controller configured in such a way that it operates the radio transmitter control loop as a closed control loop in a first operating mode, and that it operates the radio transmitter control loop as an open control loop in a second operating mode.

Abstract: An offset determination arrangement includes a comparator device to compare an input signal with a reference value. A synchronization unit is provided to forward a comparison result of the comparator device as a function of a synchronization signal which can be generated by a synchronization clock generator. The synchronization signal includes clock pulses in which at least one clock period between adjacent clock pulses is shorter than a precedent clock period. The offset determination arrangement further includes an approximation unit to generate a compensation signal corresponding to an offset of the input signal as a function of the forwarded comparison result.

Abstract: Described herein are devices and methods for implementing a transceiver with independently controlled components. The components may include a programmable digital portion, a dedicated digital portion, and an analog portion. Each independently controlled component includes a programmable controller that resides in the programmable digital portion of the component that controls components in the dedicated digital or analog portions using state transition information.

Abstract: A transmitter arrangement includes a first and a second phase-locked loop, each having a power amplifier. The first phase-locked loop generates a first amplified oscillator signal depending on a first input signal representing a first phase information, wherein a first feedback signal for the first phase-locked loop is derived from the first amplified oscillator signal. Accordingly, the second phase-locked loop generates a second amplified oscillator signal depending on a second input signal representing a second phase information. A second feedback signal for the second phase-locked loop is derived from the second amplified oscillator signal. The transmitter arrangement further includes a summation element to combine the amplified first oscillator signal and the amplified second oscillator signal to an output signal.

Abstract: A transmitter includes a transformer that is configured to transform a baseband signal into an amplitude information signal and a phase information signal. The transmitter includes a ramping control unit configured to generate a power control signal. The transmitter includes a mixer that is configured to combine the amplitude information signal with the power control signal and produce a second amplitude information signal. The transmitter includes a modulator that is configured to modulate the second amplitude information signal on the phase information signal and produce an output signal.

Abstract: The invention relates to a radio transmitter for the transmission of transmission signals. Signals to be transmitted are processed to form transmission signals by the transmission path of the radio transmitter. A first variable amplifier unit and a second variable amplifier unit are arranged in the transmission path. The first variable amplifier unit is arranged in the baseband section of the transmission path, while the second variable amplifier unit is arranged in the radio-frequency section of the transmission path.

Abstract: In an embodiment, a radio transmitter may be provided. The radio transmitter may include a radio transmitter control loop; and a controller configured in such a way that it operates the radio transmitter control loop as a closed control loop in a first operating mode, and that it operates the radio transmitter control loop as an open control loop in a second operating mode.

Abstract: An amplitude modulator is provided, which has a first supply connection for supplying a supply potential and a second supply connection for supplying a ground potential. An amplifier stage with a push-pull output stage has a signal input for supplying a signal, and has a single-pole output for emitting a single-ended signal. In order to supply the push-pull output stage, the amplifier stage is connected in a supply path between the first and the second supply connection. A first controllable voltage source and a second controllable voltage source are also provided, whose control inputs are connected to a connection for control purposes by means of a differential modulation signal, and are connected between the amplifier stage and the first supply connection, or the amplifier stage and the second supply connection. Amplitude modulation is thus achieved by modulation of the supply voltage or of the supply current to the push-pull output stage.

Abstract: A voltage control circuit is proposed, having an input for supplying a voltage control signal and having an output for production of a supply voltage. The voltage control circuit contains a control loop with a DC/DC converter arranged between a first node and a second node. The first node is designed to emit the difference between signals which are applied on the input side. The second feed node is designed to emit the sum of the applied signals. The first and the second feed nodes provide two point modulation with the DC/DC converter within the control loop of the voltage control circuit. In this case, a signal which is applied on the input side is split into a radio frequency component and a low frequency component. The processing of the low frequency component in the DC/DC converter reduces the requirements for the switching frequencies for the DC/DC converter, increases the efficiency of the voltage control circuit, and reduces the power losses.

Abstract: A transmitter arrangement includes a first and a second phase-locked loop, each having a power amplifier. The first phase-locked loop generates a first amplified oscillator signal depending on a first input signal representing a first phase information, wherein a first feedback signal for the first phase-locked loop is derived from the first amplified oscillator signal. Accordingly, the second phase-locked loop generates a second amplified oscillator signal depending on a second input signal representing a second phase information. A second feedback signal for the second phase-locked loop is derived from the second amplified oscillator signal. The transmitter arrangement further includes a summation element to combine the amplified first oscillator signal and the amplified second oscillator signal to an output signal.

Abstract: An offset determination arrangement includes a comparator device to compare an input signal with a reference value. A synchronization unit is provided to forward a comparison result of the comparator device as a function of a synchronization signal which can be generated by a synchronization clock generator. The synchronization signal includes clock pulses in which at least one clock period between adjacent clock pulses is shorter than a precedent clock period. The offset determination arrangement further includes an approximation unit to generate a compensation signal corresponding to an offset of the input signal as a function of the forwarded comparison result.

Abstract: A voltage control circuit (10) is proposed, having an input (13) for supplying a voltage control signal and having an output (V2) for production of a supply voltage. The voltage control circuit (10) contains a control loop with a DC/DC converter (19) arranged between a first node (170) and a second node (150). The first node (170) is designed to emit the difference between signals which are applied on the input side. The second feed node is designed to emit the sum of the applied signals. The first and the second feed nodes provide two-point modulation with the DC/DC converter (19) within the control loop of the voltage control circuit (10). In this case, a signal which is applied on the input side is split into a radio-frequency component and a low-frequency component. The processing of the low-frequency component in the DC/DC converter reduces the requirements for the switching frequencies for the DC/DC converter, increases the efficiency of the voltage control circuit, and reduces the power losses.