Back to results
US 2013/0293299 A1Published application
Voltage variable type digital audio amplifying device for noise compensation and method thereof
AssigneePulsus Technology Inc.
InventorsJong Hoon OH, Il Suk KO
Life of this patent
Estimating the term…
Abstract
The present invention relates to a voltage variable type digital audio amplifying device for noise compensation and a method therefore, and more specifically, varies the power according to an audio input signal, and compensates for the noise generated when varying the power, thereby enhancing audio output efficiency and easily removing noise.
Claims11
A voltage variable type digital audio amplifying device for noise compensation, comprising:
- an amplitude detection unit configured to detect an amplitude of an audio input signal;
- a noise compensation unit configured to scale the audio input signal according to a noise compensation scale;
- a pulse width modulation conversion unit configured to convert the scaled audio input signal to a pulse width modulation signal;
- an amplification unit configured to amplify the converted pulse width modulation signal according to a power supply voltage;
- an output unit configured to demodulate the amplified pulse width modulation signal through an output filter, and output an audio output signal;
- a power variation unit configured to vary the power supply voltage;
- and
- a power variation control unit configured to generate power variation control information for controlling power variation in the power variation unit according to the detected amplitude,
- wherein the noise compensation unit determines the noise compensation scale according to the generated power variation control information.
6 more elements
A voltage variable type digital audio amplifying method for noise compensation, comprising:
- an amplitude detection step of detecting an amplitude of an audio input signal;
- a power variation step of varying a power supply voltage according to the detected amplitude;
- a noise compensation step of determining a noise compensation scale according to the varied power supply voltage, and scaling the audio input signal according to the determined noise compensation scale;
- a pulse width modulation conversion step of converting the scaled audio input signal to a pulse width modulation signal;
- an amplification step of amplifying the converted pulse width modulation signal according to the varied power supply voltage;
- and
- an output step of demodulating the amplified pulse width modulation signal through an output filter, and outputting an output audio signal.
4 more elements
Dependencies are inferred from the claim text.