发明名称 |
DIGITAL-TO-ANALOG CONVERTER-PREAMPLIFIER APPARATUS |
摘要 |
A digital-to-analog converter-preamplifier apparatus serving as an interface between a source of digital audio signal data and an amplifier is disclosed. A digital stage receives multiple digital audio signal inputs, a selected one of which is analyzed by a digital audio interface receiver, processed by a digital signal processing device and a delta-sigma modulator prior to passing to the analog stage for conversion from the digital domain into left and right channel analog audio output signals. Volume control is performed on the audio signal in both the digital domain and the analog domain in order to optimize performance and minimize noise. The present invention automatically adjust for input word lengths of greater than 18-bits.
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申请公布号 |
US5243344(A) |
申请公布日期 |
1993.09.07 |
申请号 |
US19910708061 |
申请日期 |
1991.05.30 |
申请人 |
KOULOPOULOS, MICHAEL A.;SIGGELKOE, RUSSELL A.;HEGG, THOMAS R. |
发明人 |
KOULOPOULOS, MICHAEL A.;SIGGELKOE, RUSSELL A.;HEGG, THOMAS R. |
分类号 |
H03L7/093;H03M1/08;H03M1/66;H03M1/70;H03M3/00;H03M3/02 |
主分类号 |
H03L7/093 |
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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