Methods and systems are described for generating a time-varying information signal at an output of a variable gain amplifier (VGA), sampling, using a sampler having a vertical decision threshold associated with a target signal amplitude, the time-varying information signal asynchronously to generate a sequence of decisions from varying sampling instants in sequential signaling intervals, the sequence of decisions comprising (i) positive decisions indicating the time-varying information signal is above the target signal amplitude and (ii) negative decisions indicating the time-varying information signal is below the target signal amplitude, accumulating a ratio of positive decisions to negative decisions, and generating a gain feedback control signal to adjust a gain setting of the VGA responsive to a mismatch of the accumulated ratio with respect to a target ratio.

An EHF receiver that determines an initial slicing voltage level and dynamically adjusts the slicing voltage level and/or amplifier gain levels to account for characteristics of the received EHF electromagnetic data signal. The architecture includes an amplifier, detector, adaptive signal slicer, and controller. The detector includes a main detector and replica detector that convert the received EHF electromagnetic data signal into a baseband signal and a reference signal. The controller uses the baseband signal and reference signal to determine an initial slicing voltage level, and dynamically adjust the slicing voltage level and the gain settings of the amplifier to compensate for changing signal conditions.

Techniques for improving the power consumption of a communications device are described. In an example, the communications device generates a first digital signal based at least in part on an analog signal. The communications device also determines a second digital signal that corresponds to a predefined direct current (DC) signal. Further, the communications device generates a third digital signal based at least in part on the first digital signal and the second digital signal and compares a power estimate of the third digital signal with a power threshold. The power threshold is defined based at least in part on the predefined DC signal. The communications device determines that the analog signal corresponds to a data packet based at least in part on an outcome of the comparing.

A signal processing device includes an A-D converter and a controller. The A-D converter converts an analog signal to a digital signal in which portions where the amplitude exceeds a predetermined range are clipped. A counter of the controller calculates, for the digital signal, a number of clipped samples for each predetermined number of period samples. A frequency converter performs frequency conversion of the digital signal. An LPF removes high frequency components of the digital signal. A rate converter converts a sampling rate of the A-D converter. A digital amplifier amplifies and outputs the digital signal. An amplification factor adjuster multiplies a preset amplification factor of the digital amplifier by an amplification factor adjustment coefficient based on a ratio of the number of regular samples to the number of period samples, to adjust the amplification factor.

In an audio encoder, for audio content received in a source audio format, default gains are generated based on a default dynamic range compression (DRC) curve, and non-default gains are generated for a non-default gain profile. Based on the default gains and non-default gains, differential gains are generated. An audio signal comprising the audio content, the default DRC curve, and differential gains is generated. In an audio decoder, the default DRC curve and the differential gains are identified from the audio signal. Default gains are re-generated based on the default DRC curve. Based on the combination of the re-generated default gains and the differential gains, operations are performed on the audio content extracted from the audio signal.

Apparatus, systems, articles of manufacture, and methods for volume adjustment are disclosed herein. An example method includes identifying media represented in an audio signal, accessing metadata associated with the media in response to identify the media in the audio signal, determining, based on the metadata, an average volume for the media, and adjusting an output volume of the audio signal based on an average gain value, the average gain value determined based on the average volume for the media.

A charge pump controller for controlling a charge pump adapted to convert an input voltage into an output voltage with a conversion ratio is presented. The charge pump is operable in a plurality of modes corresponding to different conversion ratios. The controller includes a first selector for selecting a mode of operation of the charge pump. The first selector comprises a first input for coupling to a voltage supply; and a second input for coupling to a source signal. The first selector identifies a target value of the output voltage. The selector calculates a product of the conversion ratio and the input voltage. The selector compares the product with the target value and selects a mode of operation of the charge pump by increasing or decreasing the conversion ratio based on the comparison. The selector maintains the conversion ratio for a length of time before decreasing the conversion ratio.

A system may include a digital modulator configured to modulate an input signal received at an input of the digital modulator to generate a modulated input signal at an output of the digital modulator, a digital gain element having a digital gain and coupled to the digital modulator, an open-loop Class-D amplifier coupled to an output of the digital modulator and configured to amplify the modulated input signal, wherein the open-loop Class-D amplifier is powered from a variable power supply having a variable supply voltage which is variable in response to one or more characteristics of the input signal, and a control circuit configured to control the digital gain to approximately cancel changes in an analog gain of the open-loop Class-D amplifier due to variation in the variable supply voltage in response to the one or more characteristics of the input signal.

Provided are an adaptive equalization apparatus and a method using the same of, for optimizing digital algorithm, responding proactively in dynamic environmental change, and adjusting the monitoring range according to the signal size. The adaptive equalization apparatus includes a first equalizer filter for compensating and outputting for components of a high frequency band of an input signal; a second equalizer filter for, installed in parallel with the first equalizer filter, monitoring the input signal; a size comparison unit for sampling the size of a monitoring signal from the second equalizer filter at each period of an asynchronous clock signal; and a digital control unit for collecting the comparison data in the size comparison unit as changing an equalizer monitoring code to be provided to the second equalizer filter and a reference signal of the size comparison unit, and finding and providing an optimal equalizer control code to the first equalizer filter based on the collected comparison data; wherein the second equalizer filter compensates and outputs the input signal according to an equalizer monitoring code of the digital control unit to find an optimal equalizer control code in the digital control unit.

A system comprising audio processing circuitry is provided. The audio processing circuitry is operable to receive audio signals. The audio processing circuitry is operable to process the audio signals to detect strength of a chat component of the audio signals and strength of a game component of the audio signals. The audio processing circuitry is operable to automatically control a volume setting based on one or both of: the detected strength of the chat component, and the detected strength of the game component. The combined-game-and-chat audio signals may comprise a left channel signal and a right channel signal. The processing of the combined-game-and-chat audio signals may comprise measuring strength of a vocal-band signal component that is common to the left channel signal and the right channel signal.