Title:
AUDIO POWER AMPLIFIER IC AND AUDIO SYSTEM PROVIDED WITH THE SAME
Document Type and Number:
WIPO Patent Application WO/2006/033240
Kind Code:
A1
Abstract:
An audio power amplifier IC, which can suppress audio quality deterioration due to reference clock frequency, and an audio system provided with the audio power amplifier IC. The audio power amplifier IC is provided with a clock generating circuit (10) for generating an internal clock; a clock terminal (CLK) for performing internal clock output or external clock input; a clock selecting circuit (11) which selects either the internal clock or the external clock as the reference clock (BCLK); a first audio signal input terminal (IN1) to which a first audio signal (Lin) is inputted; and a first digital power amplifier circuit (51) which outputs a pulse synchronized with the reference clock (BCLK) by performing pulse modulation to the first audio signal (Lin) based on the reference clock (BCLK).
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| JPH0897732 | TRANSMITTER FOR PULSE ELECTRON ARTICLE SUPERVISORY EQUIPMENT |
| WO/2004/091096 | DIGITAL AMPLIFIER |
Inventors:
OHAMA SHIGEJI (JP)
OISHI SATOSHI (JP)
SOUMA MASATSUGU (JP)
OISHI SATOSHI (JP)
SOUMA MASATSUGU (JP)
Application Number:
PCT/JP2005/016579
Publication Date:
March 30, 2006
Filing Date:
September 09, 2005
Export Citation:
Assignee:
ROHM CO LTD (JP)
OHAMA SHIGEJI (JP)
OISHI SATOSHI (JP)
SOUMA MASATSUGU (JP)
OHAMA SHIGEJI (JP)
OISHI SATOSHI (JP)
SOUMA MASATSUGU (JP)
International Classes:
H03F3/217; H03F3/183; H03F3/68
Foreign References:
| JPH11317629A | 1999-11-16 | |||
| JP2003060443A | 2003-02-28 | |||
| JPS63234706A | 1988-09-30 | |||
| JP2005269580A | 2005-09-29 |
Attorney, Agent or Firm:
Fukami, Hisao (Nakanoshima Central Tower 22nd Floor, 2-7,
Nakanoshima 2-chome, Kita-k, Osaka-shi Osaka, JP)
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