3 results about "Phase reversal" patented technology

The invention discloses an audio amplification system based on phase reversal double-class-D power amplifier low power stress. The audio amplification system comprises a signal receiving and decoding module, an operational amplifier module, a double-group class-D power amplifier module, a filtering output module and a power supply module for supplying power to each module, which are connected with one another, a first operational amplifier unit in the operational amplifier module is configured to perform in-phase amplification on the analog audio signal; the second operational amplifier unit is configured to perform inverting amplification on the input signal; a first D-type power amplifier unit in a double-group D-type power amplifier module receives an in-phase signal and outputs an in-phase PWM (Pulse Width Modulation) power signal, and a second D-type power amplifier unit receives an inverted signal and outputs an inverted PWM power signal; and the first D-type power amplifier unit and the second D-type power amplifier unit work based on driving signals with opposite phases, so that peak current drawn from the power supply module is staggered or complementary in time to reduce instantaneous current stress and voltage fluctuation of the power supply module. The same audio output power is realized through ingenious signal phase management on the premise that the power supply cost is not increased or even reduced.

This invention discloses a method and system for metering unsteady-state harmonic energy based on dynamic mirror extension, relating to the field of energy metering technology. The method extracts the instantaneous frequency of the unsteady-state harmonic signal through Hilbert transform, calculates the optimal reversal point spacing, and sets reversal points only at integer multiples of the optimal reversal point spacing. This solves the problem of phase reversal point distortion caused by the frequency variation of unsteady-state harmonic extrema in traditional mirror extension, effectively suppressing the endpoint effect, improving the signal-to-noise ratio of the extension segment, and enhancing the accuracy of energy metering.

The invention discloses an audio differential output method and device and electronic equipment. The method comprises the following steps: receiving dual-channel audio data, wherein the dual-channel audio data comprises first channel data and second channel data; performing sound mixing processing on the first sound channel data and the second sound channel data to generate a target signal; performing phase reversal processing on the target signal to obtain a phase reversal signal of the target signal; outputting a target signal to a first sound channel output port of an audio codec, and outputting the inverted signal to a second sound channel output port of the audio codec; and performing audio output in a differential mode based on the target signal and the inverted signal through a load electrically coupled between the first channel output port and the second channel output port. In the invention, through a pure software processing mode, a differential output function is realized on the audio codec which only supports single-ended output, and extra hardware cost is reduced.