DAC device and audio system

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United States of America Patent

PATENT NO 9218816
APP PUB NO 20140195225A1
SERIAL NO

14209196

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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In a DAC device, a distortion correction function g1(x) of a harmonic obtained from a result of a frequency analysis on an analog output signal of a DAC circuit is obtained. A correction value is determined based on the correction function g1(x) in accordance with an input digital signal, and is previously stored in a memory. A nonlinear correction circuit reads a corresponding correction value from the memory in accordance with the value of a digital signal output from a digital filter, and transmits the correction value to a subtractor. The subtractor subtracts the correction value from the digital signal output from the digital filter.

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Patent Owner(s)

  • PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Horii, Yoshihiro Osaka, JP 1 0
Nakatsuka, Junji Osaka, JP 48 708
Sato, Takaaki Osaka, JP 118 1293
Torii, Toshihiro Aichi, JP 4 44
Uchida, Masashi Osaka, JP 88 1029

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