发明名称 |
Volume adjusting circuit and volume adjusting method |
摘要 |
A volume adjusting circuit which converts a digital audio signal to an analog signal by a D/A converter and outputs the analog signal includes: a first gain variable circuit unit which controls a gain of the digital audio signal; a second gain variable circuit unit which controls a gain of the analog signal output from the D/A converter; a storage unit which stores gain setting value; and a control unit which controls the gain of the first gain variable circuit unit and the gain of the second gain variable circuit unit based on the gain setting value stored in the storage unit, wherein the storage unit and the control unit are shared in controlling the first gain variable circuit unit and in controlling the second gain variable circuit unit. |
申请公布号 |
US8736472(B2) |
申请公布日期 |
2014.05.27 |
申请号 |
US201213659103 |
申请日期 |
2012.10.24 |
申请人 |
DOI MASAYUKI;RICOH COMPANY, LTD. |
发明人 |
DOI MASAYUKI |
分类号 |
H03M1/00;H03M1/66;H03M1/70 |
主分类号 |
H03M1/00 |
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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