发明名称 |
Tuning and DAC selection of high-pass filters for audio codecs |
摘要 |
An integrated audio codec includes a high-pass filter to prevent damage to personal computer speakers and other components. The audio codec may be compliant with HD audio standards and can operate with generic software drivers. Tuning of the high-pass filter is provided through an external pin-out where either an external capacitor or external resistors provide an ability to tune the high-pass filter. In one implementation, a tuning voltage is digitized into a tuning code used by a digital high-pass filter. In addition, multiplexers can be used to insure only the audio path leading to the speakers is filtered. |
申请公布号 |
US8411877(B2) |
申请公布日期 |
2013.04.02 |
申请号 |
US20090578477 |
申请日期 |
2009.10.13 |
申请人 |
LARSEN CHRISTIAN;CRESPI LORENZO;ELKHATIB MOUNA;CONEXANT SYSTEMS, INC. |
发明人 |
LARSEN CHRISTIAN;CRESPI LORENZO;ELKHATIB MOUNA |
分类号 |
H03G5/00;H03G9/00 |
主分类号 |
H03G5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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