Abstract: Systems, methods, and circuitries are disclosed for performing self-interference cancellation in a transceiver. In one example, a self-interference cancellation system includes a cancellation signal circuitry, cancellation circuitry, down-conversion circuitry, and an LO derivation circuitry. The cancellation signal circuitry is configured to use a cancellation transmit (TX) local oscillator (LO) signal to up-convert a baseband transmit leakage replica signal to generate a cancellation signal. The cancellation circuitry is configured to combine the cancellation signal with a received signal to generate a corrected received signal. The down-conversion circuitry is configured to use a receive (RX) LO signal to down-convert the corrected received signal to generate a baseband received signal. The LO derivation circuitry is configured to derive the cancellation TX LO signal and the RX LO signal from a common LO signal.

Abstract: A communication device can include a receiver frontend and a wake-up receiver (WUR) frontend. The receiver frontend can have a radio frequency (RF) interface configured to couple to an antenna and a baseband interface configured to couple to a baseband component. The WUR frontend can be selectively coupled to the receiver frontend (e.g. between the RF interface and the baseband interface). The WUR frontend may monitor a communication channel and control the receiver frontend to adjust its operating mode (e.g. waking the receiver frontend from a sleep mode) based on the monitoring. The WUR frontend may have a lower power consumption than the receiver frontend. The WUR frontend and the receiver frontend may share the same impedance matching network and/or the RF interface.

Abstract: A radio receiver measures a signal quality metric and modifies attributes of a local oscillator signal in response thereto. A digital signal processor may be used to determine a signal-to-noise-plus-distortion ratio (SNDR) of a baseband signal, and the overlap of two quadrature-related local oscillator signals may be modified.

Abstract: An amplifier circuit includes a low noise first stage and a wide dynamic range second stage. A feedback network coupled between the output of the second stage and the input of the first stage provides DC level shifting of the common mode input voltage. The common mode input voltage is shifted to a value that allows the output of the first stage to be compatible with the input of the second stage.

Abstract: An amplifier circuit includes a low noise first stage and a wide dynamic range second stage. A feedback network coupled between the output of the second stage and the input of the first stage provides DC level shifting of the common mode input voltage. The common mode input voltage is shifted to a value that allows the output of the first stage to be compatible with the input of the second stage.

Abstract: A radio receiver measures a signal quality metric and modifies attributes of a local oscillator signal in response thereto. A digital signal processor may be used to determine a signal-to-noise-plus-distortion ratio (SNDR) of a baseband signal, and the overlap of two quadrature-related local oscillator signals may be modified.

Abstract: Briefly, some embodiments of the invention provide devices, systems and methods of crosstalk cancellation. For example, an apparatus may include a first transmission path to carry a first signal with information to be transmitted; a second transmission path to carry a second signal with information to be transmitted; a scaler associated with said first transmission path to scale said first signal into a scaled first signal; and a combiner to combine said scaled first signal and said second signal into a combined second signal on said second transmission path.