Method and apparatus for outputting audio signal
First Claim
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1. An apparatus for outputting an audio signal, the apparatus comprising:
- a modulator and amplifier for pulse modulation and switching amplification of an input audio signal and generating an amplified signal which corresponds to the input audio signal; and
a vacuum tube amplifier which inputs a vacuum tube signal generated by attenuating the amplified signal and adding the modulator and amplifier harmonics of a vacuum tube to the amplified signal.
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Abstract
An apparatus for outputting an audio signal with improved sound quality is provided. The apparatus includes a modulation and amplification unit for pulse modulation and switching amplification of an input audio signal and generating an amplified signal which corresponds to the input audio signal; and a vacuum tube amplification unit for inputting a vacuum tube signal generated by attenuating the amplified signal and adding harmonics of a vacuum tube to the amplified signal, to the modulation and amplification unit to provide a mellow sound.
10 Citations
22 Claims
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1. An apparatus for outputting an audio signal, the apparatus comprising:
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a modulator and amplifier for pulse modulation and switching amplification of an input audio signal and generating an amplified signal which corresponds to the input audio signal; and a vacuum tube amplifier which inputs a vacuum tube signal generated by attenuating the amplified signal and adding the modulator and amplifier harmonics of a vacuum tube to the amplified signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus for outputting an audio signal, the apparatus
a vacuum tube amplifier which generates a vacuum tube signal by adding harmonics of a vacuum tube to an input audio signal; -
a pulse signal generator which generates a modulated signal that corresponds to the vacuum tube signal and is pulse modulated; a driver which generates a driving signal which corresponds to the modulated signal and controls a switching amplification operation; and a power switching amplifier which outputs an amplified signal by performing the switching amplification operation in response to the driving signal. - View Dependent Claims (14, 15, 16)
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17. A method of outputting an audio signal, the method comprising:
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pulse modulating and switch amplifying an input audio signal and generating an amplified signal which corresponds to the input audio signal; and reflecting a vacuum tube signal, generated by a vacuum tube attenuating the amplified signal and adding harmonics of the vacuum tube to the amplified signal, on the input audio signal. - View Dependent Claims (18, 19, 20, 21)
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22. A method of outputting an audio signal, the method comprising:
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generating a vacuum tube signal by adding harmonics of a vacuum tube to an input audio signal; generating a modulated signal that corresponds to the vacuum tube signal; generating a driving signal which corresponds to the modulated signal and controlling a switching amplification operation; and outputting an amplified signal by performing the switching amplification operation in response to the driving signal.
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Specification