Abstract: A system and method of frequency conversion or demodulation can be used in wireless environments. A demodulator or frequency converter can include a forward mixer path including an amplifier, a first mixer, a first input, a second input, and a first output. The forward mixer path can be configured to receive a first radio frequency signal at the first input, receive an oscillator signal at the second input and provide a baseband signal. The first mixer can configured to provide a gain.

Abstract: A receiver circuit comprising a connection portion for guiding each one of a first predefined number of carrier signals of multiple carriers to one of a number of receive branches, each receive branch comprising at least one amplifier load structure, the number of receive branches being equal to the first predefined number. The receiver circuit also comprises a mixing portion for generating a second predefined number of mixed carrier signals on each receive branch by mixing a carrier signal on each one of the receive branches with a number of local oscillator frequencies equal to the second predefined number, and a selection portion for selecting one of the second predefined number of mixed carrier signals on each receive branch to be output via a number of output paths equal to the first predetermined number to a digital data path.

Abstract: Embodiments provide methods, devices, circuitry and systems for supporting or implementing functionality to provide a filtering circuit, and for providing a transmitter, receiver or transceiver system incorporating the same. One embodiment provides a circuit for filtering signals. The circuit comprises a first connection configured to be connected to a signal line carrying varying signal voltage and a second connection. The circuit also comprises a first circuit portion comprising a parallel resonant circuit having a variable capacitance connected in parallel with a first inductor; and a second circuit portion comprising a second inductor. The first circuit portion and the second circuit portion are connected in series between the first connection and the second connection.

Abstract: A system and method of frequency conversion or demodulation can be used in wireless environments. A demodulator or frequency converter can include a forward mixer path including an amplifier, a first mixer, a first input, a second input, and a first output. The forward mixer path can be configured to receive a first radio frequency signal at the first input, receive an oscillator signal at the second input and provide a baseband signal. The first mixer can configured to provide a gain.

Abstract: A receiver circuit comprising a connection portion for guiding each one of a first predefined number of carrier signals of multiple carriers to one of a number of receive branches, each receive branch comprising at least one amplifier load structure, the number of receive branches being equal to the first predefined number. The receiver circuit also comprises a mixing portion for generating a second predefined number of mixed carrier signals on each receive branch by mixing a carrier signal on each one of the receive branches with a number of local oscillator frequencies equal to the second predefined number, and a selection portion for selecting one of the second predefined number of mixed carrier signals on each receive branch to be output via a number of output paths equal to the first predetermined number to a digital data path.

Abstract: Embodiments provide methods, devices, circuitry and systems for supporting or implementing functionality to provide a filtering circuit, and for providing a transmitter, receiver or transceiver system incorporating the same. One embodiment provides a circuit for filtering signals. The circuit comprises a first connection configured to be connected to a signal line carrying varying signal voltage and a second connection. The circuit also comprises a first circuit portion comprising a parallel resonant circuit having a variable capacitance connected in parallel with a first inductor; and a second circuit portion comprising a second inductor. The first circuit portion and the second circuit portion are connected in series between the first connection and the second connection.

Abstract: Embodiments of the invention are concerned with configurable RFICs. In an exemplary embodiment there is provided a configurable radio-frequency integrated circuit (RFIC) including one or more configurable low noise amplifier circuits, each of said one or more configurable low noise amplifier circuits being configurable between: an internal input impedance matching topology in which the respective low noise amplifier circuit includes one or more internal input impedance matching components adapted to match the input impedance of the respective low noise amplifier to a given input, said one or more internal input impedance matching components being located internally to the respective low noise amplifier circuit; and a topology different from said internal input impedance matching topology.

Abstract: Embodiments provide methods, devices, circuitry and systems for supporting or implementing functionality to provide a filtering circuit, and for providing a transmitter, receiver or transceiver incorporating the same. One embodiment provides a circuit for filtering signals. The circuit outputs a plurality of signals at a plurality of frequencies, each of the signals being attenuated by an amount determined by the frequency of the signal. The circuit attenuates signals output at a first frequency by an amount which is low relative to the attenuation of signals output at frequencies other than the first frequency. The circuit further attenuates signals output at a second frequency by an amount which is high relative to the attenuation of signals output at frequencies other than the second frequency. Responsive to a change in the control signal, the circuit changes the first and second frequencies while maintaining a fixed ratio between the first and second frequencies.

Abstract: Embodiments provide an amplifier and a method for using and manufacturing said amplifier that incorporate an impedance matching stage, a feedback circuit, and a gain stage. The impedance matching stage is coupled to the feedback circuit wherein the feedback circuit provides a compensated second bias voltage for the impedance matching stage. The output of the impedance matching stage is used to set an input bias voltage for both the impedance matching stage and the gain stage. The output of the impedance matching stage is also used, together with the output of the gain stage, to produce an output of the amplifier. A signal reuse stage may be provided between the output of the impedance matching stage and the output of the amplifier.

Abstract: A configurable low noise amplifier circuit which is configurable between a first topology in which the low noise amplifier circuit includes a degeneration inductance stage whereby the low noise amplifier circuit operates as an inductively degenerated low noise amplifier, and a second topology in which the low noise amplifier circuit includes a common-gate low noise amplifier stage whereby the low noise amplifier circuit operates as a common-gate low noise amplifier. The second topology includes one or more internal input impedance matching components and the first topology does not include the one or more internal input impedance matching components.

Abstract: Embodiments provide an amplifier and a method for using and manufacturing said amplifier that incorporate an impedance matching stage, a feedback circuit, and a gain stage. The impedance matching stage is coupled to the feedback circuit wherein the feedback circuit provides a compensated operating voltage for the impedance matching stage. The output of the impedance matching stage is used to set an input bias voltage for both the impedance matching stage and the gain stage. The output of the impedance matching stage is also used, together with the output of the gain stage, to produce an output of the amplifier.

Abstract: Circuitry for use in a direct conversion transmitting or receiving chains includes mixing circuitry which converts baseband signal to radio frequency or vice versa. A local oscillator to provide a signal having a first component and a second component at a harmonic of the first to the mixing circuitry. The circuitry has a filter circuit which attenuates signals output at a first frequency by an amount which is low relative and which attenuates signals output at a second frequency by an amount which is high, both being relative to the attenuation of signals output at frequencies other than the second frequency. The filter circuit is tunable to vary the frequencies, and configured such that the second frequency is maintained at a predetermined integer multiple of the first frequency.

Abstract: Embodiments provide an amplifier and a method for using and manufacturing said amplifier that incorporate an impedance matching stage, a feedback circuit, and a gain stage. The impedance matching stage is coupled to the feedback circuit wherein the feedback circuit provides a compensated second bias voltage for the impedance matching stage. The output of the impedance matching stage is used to set an input bias voltage for both the impedance matching stage and the gain stage. The output of the impedance matching stage is also used, together with the output of the gain stage, to produce an output of the amplifier. A signal reuse stage may be provided between the output of the impedance matching stage and the output of the amplifier.

Abstract: Embodiments provide an amplifier and a method for using and manufacturing said amplifier that incorporate an impedance matching stage, a feedback circuit, and a gain stage. The impedance matching stage is coupled to the feedback circuit wherein the feedback circuit provides a compensated operating voltage for the impedance matching stage. The output of the impedance matching stage is used to set an input bias voltage for both the impedance matching stage and the gain stage. The output of the impedance matching stage is also used, together with the output of the gain stage, to produce an output of the amplifier.

Abstract: The invention relates to a configurable low noise amplifier circuit which is configurable between a first topology in which the low noise amplifier circuit includes a degeneration inductance whereby the low noise amplifier circuit operates as an inductively degenerated low noise amplifier, and a second topology in which the low noise amplifier circuit includes a feedback resistance whereby the low noise amplifier circuit operates as a resistive feedback low noise amplifier.

Abstract: Embodiments of the invention are concerned with configurable RFICs. In an exemplary embodiment there is provided a configurable radio-frequency integrated circuit (RFIC) including one or more configurable low noise amplifier circuits, each of said one or more configurable low noise amplifier circuits being configurable between: an internal input impedance matching topology in which the respective low noise amplifier circuit includes one or more internal input impedance matching components adapted to match the input impedance of the respective low noise amplifier to a given input, said one or more internal input impedance matching components being located internally to the respective low noise amplifier circuit; and a topology different from said internal input impedance matching topology.

Abstract: The invention relates to a configurable low noise amplifier circuit which is configurable between a first topology in which the low noise amplifier circuit includes a degeneration inductance whereby the low noise amplifier circuit operates as an inductively degenerated low noise amplifier, and a second topology in which the low noise amplifier circuit includes a feedback resistance whereby the low noise amplifier circuit operates as a resistive feedback low noise amplifier.

Abstract: A configurable low noise amplifier circuit which is configurable between a first topology in which the low noise amplifier circuit includes a degeneration inductance stage whereby the low noise amplifier circuit operates as an inductively degenerated low noise amplifier, and a second topology in which the low noise amplifier circuit includes a common-gate low noise amplifier stage whereby the low noise amplifier circuit operates as a common-gate low noise amplifier. The second topology includes one or more internal input impedance matching components and the first topology does not include the one or more internal input impedance matching components.

Abstract: A configurable low noise amplifier circuit which is configurable between a first topology in which the low noise amplifier circuit comprises a degeneration inductance stage whereby the low noise amplifier circuit operates as an inductively degenerated low noise amplifier, and a second topology in which the low noise amplifier circuit comprises a common-gate low noise amplifier stage whereby the low noise amplifier circuit operates as a common-gate low noise amplifier. The second topology comprises one or more internal input impedance matching components and the first topology does not comprise the one or more internal input impedance matching components.

Abstract: Embodiments provide a configurable low noise amplifier circuit including a gain stage coupled to the input of the low noise amplifier circuit, the low noise amplifier circuit being configurable between one of a first topology in which the low noise amplifier circuit includes a degeneration inductance whereby the low noise amplifier circuit operates as an inductively degenerated low noise amplifier, and a second topology in which the low noise amplifier circuit includes an impedance matching stage coupled to an input of the configurable low noise amplifier circuit, the output of the impedance matching stage providing an input bias voltage for the impedance matching stage, and a feedback stage coupled to an output of the impedance matching stage and a voltage source, the feedback stage providing a compensated operating voltage for the impedance matching stage.