Title:
AUDIO AMP WITH SPURIOUS WAVE NOISE REDUCTION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2010/147292
Kind Code:
A1
Abstract:
An audio amp with a spurious wave noise reduction circuit according to the present invention comprises: an input unit receiving an audio signal for each channel; a modulation unit converting the audio signal into a pulse width modulation (PWM) signal; an amplification unit amplifying the PWM signal; an output unit extracting an audio signal from the amplified PWM signal to output; a power supply applying power to the input unit, the modulation unit, the amplification unit, and the output unit; and a pulse generation unit generating a first reference signal that is a pulse signal applied to the amplification unit and a second reference signal that is a pulse signal applied to the power supply. In the amp of the present invention, the first reference signal is applied to the modulation unit to synchronize the PWM signal with respect to the audio signal for each channel, and the second reference signal is applied to the power supply to synchronize the pulse signal generated in the power supply with the PWM signal, thereby significantly reducing spurious wave noise due to frequency interference occurring in the audio amp, through simple filtering.
Inventors:
KIM IL HWAN (KR)
Application Number:
PCT/KR2010/001741
Publication Date:
December 23, 2010
Filing Date:
March 22, 2010
Export Citation:
Assignee:
DESIGNS INC M (KR)
KIM IL HWAN (KR)
KIM IL HWAN (KR)
International Classes:
H03F3/217; H03K7/08
Foreign References:
| KR100618408B1 | 2006-08-31 | |||
| US20070210861A1 | 2007-09-13 | |||
| US20060197570A1 | 2006-09-07 | |||
| US20060103459A1 | 2006-05-18 |
Attorney, Agent or Firm:
LEE, JEONG-HYUN (KR)
이정현 (KR)
이정현 (KR)
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