Amplifiers – Modulator-demodulator-type amplifier
Reexamination Certificate
2011-05-31
2011-05-31
Mottola, Steven J (Department: 2817)
Amplifiers
Modulator-demodulator-type amplifier
C330S059000
Reexamination Certificate
active
07952426
ABSTRACT:
A digital audio signal amplifier and a digital audio signal amplifying method provide safety and power efficiency by integrating a switching mode power supply and a digital audio amplifier into an apparatus. The digital audio amplifier includes a pulse modulation unit generate a pulse modulated audio signal by pulse-modulating an input audio signal, a switching unit to switch a DC voltage based on the pulse modulated audio signal, an insulation transformer to transform the output of the switching unit and to output the result of the transforming, and a low-pass filter to obtain an audio signal corresponding to the input audio signal by low-pass filtering the output of the insulation transformer, and to output the output audio signal. By integrating a switching mode power supply and a digital audio amplifier into an apparatus, the digital audio amplifier satisfies the insulation requirement and at the same time increases power efficiency.
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Mottola Steven J
Samsung Electronics Co,. Ltd.
Stanzione & Kim LLP
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