An electronic circuit converts a receive signal being analog into reception data being digital. The electronic circuit includes a delay circuit that receives a first receive signal and outputs a reference signal, the reference signal being generated by delaying the first receive signal as much as one of a plurality of different timing delays respectively set to a plurality of loops, a sampler that receives a second receive signal and samples the second receive signal based on the reference signal in each of the plurality of loops, a timing skew estimation circuit that outputs a compensation signal for compensating for a timing skew by extracting a statistical characteristic of a plurality of sample data sampled through the sampler and estimating the timing skew based on the statistical characteristic, and a controller that controls an operation of the timing skew estimation circuit.

A Digital-to-Analog Converter, DAC, is provided. The DAC comprises one or more first DAC cells configured to generate a first analog signal based on first digital data. The one or more first DAC cells are coupled to a first output node for coupling to a first load. The DAC comprises one or more second DAC cells configured to generate a second analog signal based on second digital data. The one or more second DAC cells are coupled to a second output node for coupling to a second load. The one or more first DAC cells and the one or more second DAC cells are couplable to a power supply for drawing a supply current. The DAC further comprises a data generation circuit configured to generate the second digital data based on the first digital data.

A radio frequency module includes a mounting board, a low noise amplifier, a reception filter, and an input matching circuit. The low noise amplifier is mounted on the mounting board. The reception filter is connected to the low noise amplifier. The input matching circuit is provided on a signal path between the reception filter and the low noise amplifier. The input matching circuit includes at least one inductor. The reception filter is disposed on the low noise amplifier. The at least one inductor included in the input matching circuit is adjacent to the low noise amplifier such that no other circuit element is present between the low noise amplifier and the at least one inductor.

Techniques maintaining receiver reliability, including determining a present attenuation level for an attenuator, wherein the attenuation level is set by a gain controller, determining a relative reliability threshold based on the present attenuation level, receiving a radio frequency (RF) signal, determining a voltage level of the received RF signal, comparing the voltage level of the received RF signal to the relative reliability threshold to determine that a reliability condition exists, and overriding, in response to the determination that the reliability condition exists, the present attenuation level set by the gain controller with an override attenuation level based on the present attenuation level.

An RF module includes a switch IC on a surface of a module substrate and a passive circuit provided in and/or on the module substrate. The switch IC includes a high-frequency circuit on an IC substrate and a digital control circuit. In a plan view of the IC substrate, the digital control circuit is surrounded by the high-frequency circuit. The high-frequency circuit includes analog ground electrodes in a boundary portion with the digital control circuit in the high-frequency circuit to surround the digital control circuit in the plan view.

A radio frequency module includes: a transmission power amplifier that includes a plurality of amplifying elements that are cascaded; and a module board on which the transmission power amplifier is mounted, the module board including a first principal surface and a second principal surface on opposite sides of the module board. The plurality of amplifying elements include: a first amplifying element mounted on the first principal surface; and a second amplifying element mounted on the second principal surface and disposed upstream on a signal path from the first amplifying element.

A mobile device may be configured to perform concurrent Satellite Positioning System and communication system operation, e.g. enabling an SPS receiver to continue to receive SPS signals in frequency bands that are interfered with due to aggressor transmission signals. A controllable filter, such as a selectable and/or tunable notch or lowpass filter is used to reject the aggressor transmission signals. The controllable filter may also attenuate some, but not all, frequencies in the SPS L1 band. To avoid losing complete access to these filtered SPS signal frequencies, the controllable filter is controlled, e.g., selected or tuned to these frequencies only when the aggressor transmission signal is active, and is otherwise turned off or tuned away from the SPS signal frequencies.

Techniques maintaining receiver reliability, including determining a present attenuation level for an attenuator, wherein the attenuation level is set by a gain controller, determining a relative reliability threshold based on the present attenuation level, receiving a radio frequency (RF) signal, determining a voltage level of the received RF signal, comparing the voltage level of the received RF signal to the relative reliability threshold to determine that a reliability condition exists, and overriding, in response to the determination that the reliability condition exists, the present attenuation level set by the gain controller with an override attenuation level based on the present attenuation level.

The present invention provides an interference cancellation circuit, wherein the interference cancellation circuit includes a PAPR detection circuit, a control circuit and a filter. In the operations of the interference cancellation circuit, the PAPR detection circuit is configured to detect a PAPR of a signal in a spectrum in a real-time manner to generate a detection result. The control circuit is configured to generate a control signal according to the detection result. The filter is configured to determine a filtering frequency point of the filter according to the control signal, and to filter the signal to generate an output signal.

A wireless communication device includes a transmission radio frequency (RF) chain configured to transmit a radio signal, and processing circuitry configured to cause the wireless communication device to detect that the transmission RF chain has transited from an inactive state to a first active state, determine whether to detect an updated value of a phase of a self-interference signal in response to detecting that the transmission RF chain has transited from the inactive state to the first active state, and modify a weight vector of an adaptive filter corresponding to the self-interference signal based on the updated value of the phase or a previous value of the phase.