发明名称 |
Audio amplifier system using a class D amplifier |
摘要 |
Class D amplifiers are difficult to incorporate into audio amplifier systems because of the interference created by the amplifier and/or the surrounding circuits. The modulation frequencies f1 and f2 of two class D amplifiers in an audio amplifier system are adjusted so that the frequency f1-f2 of interference between the modulation frequencies is outside the reproducible frequency band B1 of speakers converting the class D amplifier output to audible sound. As a result, interference that may result from simultaneous use of two class D amplifiers for similar purposes is inaudible and not perceived as noise.
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申请公布号 |
US6028943(A) |
申请公布日期 |
2000.02.22 |
申请号 |
US19990300256 |
申请日期 |
1999.04.27 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
NAGATA, KOICHIRO |
分类号 |
H03F3/217;H04R3/12;(IPC1-7):H04R3/00 |
主分类号 |
H03F3/217 |
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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