An apparatus comprises an RF receiver for receiving an RF signal. The RF receiver includes front-end circuitry to generate a first down-converted signal, and a plurality of signal detectors to generate a corresponding plurality of detection signals from signals derived from the down-converted signal. The RF receiver further includes a controller to provide at least one control signal to the front-end circuitry based on the plurality of detection signals.

Mobile devices with dual conversion of multiple frequency bands using a shared intermediate frequency are provided. In certain embodiments, a mobile device includes a frequency range two (FR2) front end system configured to upconvert a first intermediate frequency (IF) transmit signal to generate a first radio frequency (RF) transmit signal of a first frequency band in FR2 of 5G, and to upconvert a second IF transmit signal to generate a second RF transmit signal of a second frequency band in FR2. The mobile device further includes a transceiver configured to generate the first IF transmit signal and the second IF transmit signal on a common intermediate frequency.

An aspect of the disclosure relates to a receiver, including: a low noise amplifier (LNA); and an input stage coupled to the LNA, wherein the input stage is configured to provide a first passband for a first signal across at least a portion of a first frequency band and a notch to substantially reject a second signal within the first frequency band or a second frequency band in accordance with a first mode of operation, and a second passband for the second signal across the second frequency band in accordance with a second mode of operation. In the first mode, the input stage includes a parallel L-C resonance frequency and an L-match impedance matching circuit. In the second mode, the input stage includes a modified bridge T-coil impedance matching circuit with substantially no electromagnetic coupling between the inductors of the circuit.

A digital radio includes an input configured to receive an input signal and an analog-to-digital converter (ADC) configured to sample analog data in the input signal into a digital input signal. The digital input signal has first digital data encoded at a first data rate modulated at a first frequency. The digital radio further includes a signal processor configured to generate, based on the digital input signal, a digital output signal having second digital data encoded at a second data rate modulated at a second frequency. The first data rate is different from the second data rate and/or the first frequency is different from the second frequency. The digital radio further includes an output configured to provide the digital output signal to a target device, where the second data rate and the second frequency match a frequency plan of the target device.

An apparatus comprises an RF receiver for receiving an RF signal. The RF receiver includes front-end circuitry to generate a first down-converted signal, and a plurality of signal detectors to generate a corresponding plurality of detection signals from signals derived from the down-converted signal. The RF receiver further includes a controller to provide at least one control signal to the front-end circuitry based on the plurality of detection signals.

An electronic device may include wireless circuitry. The wireless circuitry may include at least a digital predistortion circuit, an upconversion circuit, and a load-line modulated amplifier circuit. The digital predistortion circuit can be configured to receive a reference baseband signal from one or more processors and to selectively output a predistorted version of the reference baseband signal. The upconversion circuit can be configured to receive a signal from the digital predistortion circuit and to output a radio-frequency signal. The load-line modulated amplifier circuit can be configured to amplify the radio-frequency signal. The load-line modulated amplifier circuit can include an adjustable load component. The adjustable load component can have a constant impedance when an instantaneous signal amplitude of the reference baseband signal is within a first range and can be tuned to have a varying impedance when the instantaneous signal amplitude of the reference baseband signal is within a second range.

In an embodiment, an apparatus includes: a first receiver to receive and downconvert a first radio frequency (RF) signal to a second frequency signal and to output a first digitized signal, the first receiver comprising a full-band receiver to receive at least a substantial portion of a band of interest; a second receiver to receive and downconvert a second RF signal to a third frequency signal and to output a second digitized signal, the second receiver comprising a narrow-band receiver to receive a first channel of the band of interest; a digital circuit to process at least one of the first and second digitized signals; and a controller to configure the first receiver and the second receiver and control the digital circuit.

In an embodiment, an apparatus includes: a first receiver to receive and downconvert a first radio frequency (RF) signal to a second frequency signal and to output a first digitized signal, the first receiver comprising a full-band receiver to receive at least a substantial portion of a band of interest; a second receiver to receive and downconvert a second RF signal to a third frequency signal and to output a second digitized signal, the second receiver comprising a narrow-band receiver to receive a first channel of the band of interest; a digital circuit to process at least one of the first and second digitized signals; and a controller to configure the first receiver and the second receiver and control the digital circuit.

Mobile devices with dual conversion of multiple frequency bands using a shared intermediate frequency are provided. In certain embodiments, a mobile device includes a frequency range two (FR2) front end system configured to upconvert a first intermediate frequency (IF) transmit signal to generate a first radio frequency (RF) transmit signal of a first frequency band in FR2 of 5G, and to upconvert a second IF transmit signal to generate a second RF transmit signal of a second frequency band in FR2. The mobile device further includes a transceiver configured to generate the first IF transmit signal and the second IF transmit signal on a common intermediate frequency.

A transmitter/receiver for transmitting and receiving an electromagnetic signal. The electromagnetic signal is provided for exchange with a sensor for object detection. The transmitter/receiver has an analog part which is set up to: convert a first signal at least at one intermediate frequency level into a second signal at a transmission frequency level and output the second signal as an electromagnetic signal via an output; receive a third signal as an electromagnetic signal via an input; and/or convert the third signal at the transmission frequency level into a fourth signal at the at least one intermediate frequency level. The third signal can be derived from the second signal. The transmitter/receiver is set up to generate a test signal and feed it into the analog part as the first signal and to test the analog part by comparing the test signal and the fourth signal.