Abstract: The SAW filter chip comprises a plurality of SAW filters (1, 2), wherein at least one of the several electric filters is a first-type electric filter (1) comprising at least one first-type SAW-resonator (10). The first-type SAW-resonator comprises a piezoelectric layer (11), an intermediate layer (12) on the piezoelectric layer (11) and an interdigital electrode structure (13) on the intermediate layer (12). The interdigital electrode structure is separated from the piezoelectric layer by the intermediate layer. The intermediate layer is made of a dielectric, non-piezoelectric material and adjusts the electromechanical coupling factor and the bandwidth of the respective filter. The plurality of SAW filters form an LTE multiplexer, wherein the thickness of the intermediate layer is chosen to adjust the required bandwidth to the desired bands. The intermediate layer may be absent for larger required bandwidths.

Abstract: Examples provide an adaptation circuit and apparatus, method and computer programs for adapting, fabricating and operating, a radio transceiver, a mobile transceiver, a base station transceiver and storage for computer programs or instructions. The adaptation circuit (10) is configured to adapt a local oscillator signal in a radio transceiver (30). The radio transceiver (30) comprises a transmission branch (14) and a reception branch (16), which are subject to cross-talk. The reception branch (16) comprises a local oscillator (18) configured to generate the local oscillator signal. The adaptation circuit (10) comprises a control module (12) configured to determine crosstalk level information between the transmission branch (14) and the reception branch (16), and to adapt the local oscillator signal based on the crosstalk level information.

Abstract: Aspects generally relate to a capacitor formed by a first conductive plate and a second conductive plate with an insulating material located between the first and second conductive plates. A third conductive plate is coupled to the second conductive plate, and a size or an overlap of the third conductive layer to the insulating layer and first conductive plate are adjusted to achieve a desired overall capacitance value of the capacitor.

Abstract: Examples provide an adaptation circuit and apparatus, method and computer programs for adapting, fabricating and operating, a radio transceiver, a mobile transceiver, a base station transceiver and storage for computer programs or instructions. The adaptation circuit (10) is configured to adapt a local oscillator signal in a radio transceiver (30). The radio transceiver (30) comprises a transmission branch (14) and a reception branch (16), which are subject to cross-talk. The reception branch (16) comprises a local oscillator (18) configured to generate the local oscillator signal. The adaptation circuit (10) comprises a control module (12) configured to determine crosstalk level information between the transmission branch (14) and the reception branch (16), and to adapt the local oscillator signal based on the crosstalk level information.

Abstract: Radio frequency (RF) communication circuitry comprises an RF transceiver and conflict detection circuitry. The RF transceiver includes a first communication path configured to down-convert received RF signals using a first local oscillator (LO) receive frequency; and a second communication path configured to down-convert received RF signals using a second LO receive frequency and to operate simultaneously with the first communication path. The conflict detection circuitry is configured to determine path crosstalk using the first and second LO receive frequencies and using a first LO transmit frequency used by the first RF transceiver or a second RF transceiver to up-convert electrical signals for RF transmission, and initiate a change of the first LO receive frequency by a first frequency shift value and a change of the second LO receive frequency by a second frequency shift value in response to the path crosstalk.

Abstract: A system using multiple communication technologies for concurrent communication is disclosed. The system includes a transmitting subunit, a receiving subunit and a control unit. The transmitting subunit is configured to generate a transmit signal. The receiving subunit is configured to receive a receive signal. The control unit is coupled to the transmitting subunit and the receiving subunit and is configured to determine a presence or potential of crosstalk between the transmit signal and the receive signal. Additionally, the control unit is configured to reduce power of the transmitting subunit to mitigate the crosstalk.

Abstract: Radio frequency (RF) communication circuitry comprises an RF transceiver and conflict detection circuitry. The RF transceiver includes a first communication path configured to down-convert received RF signals using a first local oscillator (LO) receive frequency; and a second communication path configured to down-convert received RF signals using a second LO receive frequency and to operate simultaneously with the first communication path. The conflict detection circuitry is configured to determine path crosstalk using the first and second LO receive frequencies and using a first LO transmit frequency used by the first RF transceiver or a second RF transceiver to up-convert electrical signals for RF transmission, and initiate a change of the first LO receive frequency by a first frequency shift value and a change of the second LO receive frequency by a second frequency shift value in response to the path crosstalk.

Abstract: A system using multiple communication technologies for concurrent communication is disclosed. The system includes a transmitting subunit, a receiving subunit and a control unit. The transmitting subunit is configured to generate a transmit signal. The receiving subunit is configured to receive a receive signal. The control unit is coupled to the transmitting subunit and the receiving subunit and is configured to determine a presence or potential of crosstalk between the transmit signal and the receive signal. Additionally, the control unit is configured to reduce power of the transmitting subunit to mitigate the crosstalk.

Abstract: A multi-standard transceiver includes a first subunit configured to perform signal processing according to a first communication standard and a second subunit configured to perform signal processing according to a second communication standard. Furthermore, the multi-standard transceiver includes an interference cancellation unit configured to drive an estimated interference signal from a first signal generated by the first subunit by performing the signal processing according to the first communication standard, and perform interference cancellation on a second signal generated by the second subunit by performing the signal processing according to the second communication standard based on the estimated interference signal.

Abstract: Embodiments related to analog front-ends for wireless and wired are described and depicted.

Abstract: A multi-standard transceiver includes a first subunit configured to perform signal processing according to a first communication standard and a second subunit configured to perform signal processing according to a second communication standard. Furthermore, the multi-standard transceiver includes an interference cancellation unit configured to drive an estimated interference signal from a first signal generated by the first subunit by performing the signal processing according to the first communication standard, and perform interference cancellation on a second signal generated by the second subunit by performing the signal processing according to the second communication standard based on the estimated interference signal.

Abstract: Some embodiments of the present disclosure relate to a transceiver that includes multiple communication subunits associated with multiple communication protocols, respectively. The transceiver includes a conflict detection and control unit that determines whether interference is present or anticipated to occur between two or more of the communication subunits. If interference is present or anticipated, a local oscillator (LO) tuning unit changes an LO frequency provided to at least one of the two or more communication units. For example, in some embodiments, the LO tuning unit changes the LO frequency from high-side injection to low-side injection, or vice versa, or changes the intermediate frequency (IF) associated with a given communication subunit. In these ways, the techniques disclosed herein limit signal degradation due to interference from communication subunits residing within the transceiver.

Abstract: A circuit arrangement for signal mixing. One embodiment provides a circuit arrangement for mixing an input signal with at least one carrier signal. The circuit arrangement includes a current source and a current sink. The current source and the current sink have a mixer core coupled between them which provides cross-coupling between mixer input connections and mixer output connections.

Abstract: Embodiments related to analog front-ends for wireless and wired are described and depicted.

Abstract: A circuit arrangement for signal mixing. One embodiment provides a circuit arrangement for mixing an input signal with at least one carrier signal. The circuit arrangement includes a current source and a current sink. The current source and the current sink have a mixer core coupled between them which provides cross-coupling between mixer input connections and mixer output connections.

Abstract: An amplifier stage includes a first and a second signal path having a series connection of a first transistor of a first conduction type which forms a control input for receiving an input signal to the amplifier stage and a second transistor of a second conduction type. The amplifier stage further includes a first and second signal output which are formed by a respective connection node of the respective first and second transistors. For each of the first and the second signal path, the amplifier stage includes a third transistor of the second conduction type which is connected to the respective second transistor as current mirror, and a fourth transistor of the first conduction type which is connected to the respective first transistor as a current mirror and which is for controlling the third transistor of the other signal path, respectively.

Abstract: An amplifier stage includes a first and a second signal path having a series connection of a first transistor of a first conduction type which forms a control input for receiving an input signal to the amplifier stage and a second transistor of a second conduction type. The amplifier stage further includes a first and second signal output which are formed by a respective connection node of the respective first and second transistors. For each of the first and the second signal path, the amplifier stage includes a third transistor of the second conduction type which is connected to the respective second transistor as current mirror, and a fourth transistor of the first conduction type which is connected to the respective first transistor as a current mirror and which is for controlling the third transistor of the other signal path, respectively.

Abstract: A crest factor reduction circuit for reducing a crest factor (CF) of a multi-tone-data signal which is transmitted in a predetermined transmission frequency band, wherein the crest factor reduction circuit (8) comprises means (34) for subtracting a multi-tone-correction signal from said multi-tone-data signal, wherein the multi-tone-correction signal comprises a plurality of tone signals having frequencies outside said transmission frequency band.

Abstract: A line driver (3) for transmitting data with high bit rates, in particular for wire-bound data transmission in the full-duplex process, comprises a differential pair with differential pair transistors (14, 15) for generating transmission impulses as a function of the data to be transmitted, whereby the transmission impulses are preferably output via cascode transistors (16, 17), each with the differential pair transistors (14, 15) forming a cascode circuit, onto the data transmission line (8, 9) connected to the line driver (3).

Abstract: A circuit arrangement for the analogue suppression of echoes, as in particular can be used in a hybrid-circuit for DSL-transmission systems, comprises a replica (8) for emulating the behaviour of the transmission line (17). In addition, a circuit (3, 4) for emulating the behaviour of the transmitter (13) is provided, which comprises at least one lowpass (3, 4). Furthermore, a replica (9, 10) for emulating the behaviour of bridge taps (14) can also be provided, which comprises at least one bandpass (9, 10). Additionally, a replica (19) for emulating the behaviour of the line driver (1) can also be provided.