Abstract: A Phase Rotator and Amplitude control Unit, PRAU (500), for performing phase rotation and amplitude control of an input signal and generating an output signal with an individual phase shift is disclosed. The PRAU (500) comprises a plurality N1 of Phase Rotator and Amplitude control Circuits, PRAC. Each PRAC comprises an input port comprising in-phase and quadrature-phase inputs to receive the input signal; an output port comprising in-phase and quadrature-phase outputs, control inputs to receive phase and amplitude control parameters. The phase and amplitude control parameters comprise sign control signals and positive amplitude coefficient signals, and each positive amplitude coefficient signal has N1 digital bits. Each PRAC further comprises a plurality of switched transconductance branches, and each switched transconductance branch comprises one transconductance transistor connected in series with two switching transistors.

Abstract: An amplifier for a receiver circuit is disclosed. The amplifier has an input node (Vin) and an output node (Vout). It comprises a tunable tank circuit connected to the output node (Vout), a feedback circuit path connected between the output node (Vout) and the input node (Vin), and a tunable capacitor connected between an internal node of the feedback circuit path and a reference-voltage node. A receiver circuit and a communication apparatus is disclosed as well.

Abstract: A technique for cancelling or reducing crosstalk signals between controlled oscillators in an integrated circuit is provided. The technique involves an arrangement adapted to reduce a crosstalk signal generated by a first controlled oscillator to a second oscillator both comprised in the integrated circuit, wherein both controlled oscillators are configured to output a respective clock signal. The arrangement comprises a detector adapted to detect the crosstalk signal generated by the first controlled oscillator to the second controlled oscillator, a crosstalk cancellation circuit adapted to generate a cancellation signal having an amplitude substantially the same as that of the crosstalk signal and a phase substantially opposite to that of the crosstalk signal, and a cancellation signal injector adapted to introduce the cancellation signal into the second controlled oscillator.

Abstract: A receiver front end arrangement comprises a radio frequency signal input suitable to be connected to an antenna arrangement, a filter bank of non-overlapping band filters associated with respective band for the multi-band reception, a signal conditioning arrangement connected to the filter bank, and a low-noise amplifier arrangement connected to the signal conditioning arrangement. The low-noise amplifier arrangement comprises a path for each band of bands of the multi-band reception. For each path associated with a band for the multi-band reception the low-noise amplifier arrangement comprises a low-noise amplifier. The respective low-noise amplifier has band pass characteristics, or has a band filter connected where the band filter output has a direct connection to the input of the low-noise amplifier, corresponding to a band of the multi-band reception, respectively.

Abstract: An interface for inter-chip communication, comprises a transmitter part (TX) for transmitting a differential signal and a receiver part (RX) for receiving the differential signal, the transmitter part (TX) being provided in a first integrated circuit chip (CHIP A) and the receiver part (RX) being provided in a second integrated circuit chip (CHIP B). The transmitter part (TX) comprises a first transistor (Tx1) and a second transistor (Tx2) arranged in a common source configuration, and the receiver part (RX) comprises a third transistor (TR1) and a fourth transistor (TR2) arranged in a common gate configuration. Current flowing in the receiver part (RX) also flows through the transmitter part (TX).

Abstract: A Phase Rotator and Amplitude control Unit, PRAU (500), for performing phase rotation and amplitude control of an input signal and generating an output signal with an individual phase shift is disclosed. The PRAU (500) comprises a plurality N1 of Phase Rotator and Amplitude control Circuits, PRAC. Each PRAC comprises an input port comprising in-phase and quadrature-phase inputs to receive the input signal; an output port comprising in-phase and quadrature-phase outputs, control inputs to receive phase and amplitude control parameters. The phase and amplitude control parameters comprise sign control signals and positive amplitude coefficient signals, and each positive amplitude coefficient signal has N1 digital bits. Each PRAC further comprises a plurality of switched transconductance branches, and each switched transconductance branch comprises one transconductance transistor connected in series with two switching transistors.

Abstract: A beamforming receiver 100 for receiving multiple radio signals and generating multiple output beam signals is disclosed. The beamforming receiver (100) comprises multiple beam parameter inputs (130) to receive multiple beam parameters and an element array (110) comprising a plurality of elements (120). The beamforming receiver 100 further comprises a loading unit 140 coupled to each element 120 in the element array 110. The beamforming receiver 100 further comprises a reference clock generating and splitting circuit 150 to generate and distribute reference clock signals for each element 120.

Abstract: An interface for inter-chip communication, comprises a transmitter part (TX) for transmitting a differential signal and a receiver part (RX) for receiving the differential signal, the transmitter part (TX) being provided in a first integrated circuit chip (CHIP A) and the receiver part (RX) being provided in a second integrated circuit chip (CHIP B). The transmitter part (TX) comprises a first transistor (Tx1) and a second transistor (Tx2) arranged in a common source configuration, and the receiver part (RX) comprises a third transistor (TR1) and a fourth transistor (TR2) arranged in a common gate configuration. Current flowing in the receiver part (RX) also flows through the transmitter part (TX).

Abstract: A technique for cancelling or reducing crosstalk signals between controlled oscillators in an integrated circuit is provided. The technique involves an arrangement adapted to reduce a crosstalk signal generated by a first controlled oscillator to a second oscillator both comprised in the integrated circuit, wherein both controlled oscillators are configured to output a respective clock signal. The arrangement comprises a detector adapted to detect the crosstalk signal generated by the first controlled oscillator to the second controlled oscillator, a crosstalk cancellation circuit adapted to generate a cancellation signal having an amplitude substantially the same as that of the crosstalk signal and a phase substantially opposite to that of the crosstalk signal, and a cancellation signal injector adapted to introduce the cancellation signal into the second controlled oscillator.

Abstract: A transformer filter arrangement including a transformer having a first winding and a second winding is provided. Both of the first and the second windings are located between an outer border and an inner border, which is inside the outer border. The transformer filter arrangement further includes at least one reactive sub circuit, each including at least one inductor. The first winding of the transformer is divided into a plurality of winding segments. At least a first one of the at least one reactive sub circuit being connected in series with the winding segments of the first winding between two such winding segments, and having at least one of the at least one inductor located inside said inner border.

Abstract: A configurable passive mixer is described herein. According to one exemplary embodiment, a passive mixer for a wireless receiver comprises a plurality of passive mixer cores coupled in parallel with each mixer core configured to receive a same set of radio frequency input signals and a separately driven set of local oscillator input signals. Further, each mixer core is configured to be separately enabled or disabled so that the passive mixer can be selectively configured during operation to convert the same set of radio frequency input signals to a set of downconverted output signals that satisfy a certain performance requirement or performance parameter of the passive mixer.

Abstract: A transmitter comprising a power amplifier, a phase modulator, a switched DC-DC converter, all operating in dual mode, and a controller is disclosed. The power amplifier is arranged to selectively operate either in a first mode or in a second mode, wherein the first mode is a linear mode and the second mode is a non-linear mode in order to save power with least increasing cost in hardware. The transmitter is adapted to operate at different allocated bandwidths, for different radio standards while keeping minimum power consumption governed by the controller. A transceiver, a communication device, a method and a computer program are also disclosed.

Abstract: A configurable passive mixer is described herein. According to one exemplary embodiment, the passive mixer comprises a clock generator, a controller, and a plurality of passive mixer cores connected in parallel. The clock generator comprises a local oscillator drive unit for each passive mixer core. The controller varies an effective transistor size of the passive mixer by separately configuring each of the passive mixer cores to enable/disable each passive mixer core. For example, the controller may selectively enable one or more of the passive mixer cores to vary the effective transistor width of the passive mixer. As the performance requirements and/or the operating communication standard change, the controller may re-configure each passive mixer core.

Abstract: A transmitter comprising a power amplifier, a phase modulator, a switched DC-DC converter, all operating in dual mode, and a controller is disclosed. The power amplifier is arranged to selectively operate either in a first mode or in a second mode, wherein the first mode is a linear mode and the second mode is a non-linear mode in order to save power with least increasing cost in hardware. The transmitter is adapted to operate at different allocated bandwidths, for different radio standards while keeping minimum power consumption governed by the controller. A transceiver, a communication device, a method and a computer program are also disclosed.

Abstract: A receiver circuit comprising a transformer arrangement comprising a transformer structure, multiple and distributed receiver units arranged to be connected to one and same antenna via the transformer arrangement and arranged to operate on the same frequency and bandwidth as each other, wherein the transformer arrangement is arranged to input the antenna signal and to output signals at different output ports for the respective receiver unit, and a combiner circuit arranged to combine outputs of the multiple receiver units such that the combiner circuit outputs a combined signal, and corresponding communication apparatus, method and computer program are disclosed.

Abstract: A distributed power amplifier circuit is disclosed. The distributed power amplifier circuit comprises an amplifier arrangement comprising a plurality of sub amplifiers, each having an output port for outputting an output signal of the sub-amplifier and an output combiner network for combining the output signals from the sub amplifiers. The output combiner network includes, for each sub amplifier, an associated auto transformer operatively connected to the output port of the sub amplifier for receiving the output signal of the sub amplifier. The auto transformers each have a first interconnection terminal and a second interconnection terminal. The auto transformers are operatively connected in series via the interconnection terminals, thereby forming a chain of auto transformers having a first end and a second end, wherein the first end is arranged to be connected to an antenna.

Abstract: A receiver front end arrangement comprises a radio frequency signal input suitable to be connected to an antenna arrangement, a filter bank of non-overlapping band filters associated with respective band for the multi-band reception, a signal conditioning arrangement connected to the filter bank, and a low-noise amplifier arrangement connected to the signal conditioning arrangement. The low-noise amplifier arrangement comprises a path for each band of bands of the multi-band reception. For each path associated with a band for the multi-band reception the low-noise amplifier arrangement comprises a low-noise amplifier. The respective low-noise amplifier has band pass characteristics, or has a band filter connected where the band filter output has a direct connection to the input of the low-noise amplifier, corresponding to a band of the multi-band reception, respectively.

Abstract: A technique for cancelling or reducing crosstalk signals between controlled oscillators in an integrated circuit is provided. The technique involves an arrangement adapted to reduce a crosstalk signal generated by a first controlled oscillator to a second oscillator both comprised in the integrated circuit, wherein both controlled oscillators are configured to output a respective clock signal. The arrangement comprises a detector adapted to detect the crosstalk signal generated by the first controlled oscillator to the second controlled oscillator, a crosstalk cancellation circuit adapted to generate a cancellation signal having an amplitude substantially the same as that of the crosstalk signal and a phase substantially opposite to that of the crosstalk signal, and a cancellation signal injector adapted to introduce the cancellation signal into the second controlled oscillator.

Abstract: A technique for cancelling or reducing crosstalk signals between controlled oscillators in an integrated circuit is provided. The technique involves an arrangement adapted to reduce a crosstalk signal generated by a first controlled oscillator to a second oscillator both comprised in the integrated circuit, wherein both controlled oscillators are configured to output a respective clock signal. The arrangement comprises a detector adapted to detect the crosstalk signal generated by the first controlled oscillator to the second controlled oscillator, a crosstalk cancellation circuit adapted to generate a cancellation signal having an amplitude substantially the same as that of the crosstalk signal and a phase substantially opposite to that of the crosstalk signal, and a cancellation signal injector adapted to introduce the cancellation signal into the second controlled oscillator.

Abstract: A transformer filter arrangement (30) for passing signals at a fundamental frequency and suppressing signals at one or more interfering frequencies is disclosed. It comprises a transformer (100) having a first winding (110) and a second winding (120), wherein the first winding (110) has a first end (112a) and a second end (122b) and the second winding (120) has a first end (122a) and a second end (122b). It further comprises one or more capacitors (130a-e).