发明名称 |
DOUBLE INTEGRAL METHOD OF POWERING UP OR DOWN A SPEAKER |
摘要 |
An audio subsystem having a waveform generation circuit that generates a power-up signal for controlling an electric signal used to drive a speaker during a power-up period in which the power-up signal has a positive second derivative during a first sub-period of the power-up period and has a negative second derivative during a second sub-period of the power-up period. The first sub-period spans at least one-fourth of the power-up period, and the second sub-period spans at least one-fourth of the power-up period.
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申请公布号 |
US2011007912(A1) |
申请公布日期 |
2011.01.13 |
申请号 |
US20090498745 |
申请日期 |
2009.07.07 |
申请人 |
MEDIATEK SINGAPORE PTE. LTD. |
发明人 |
THOMPSON FREDERICK CARNEGIE |
分类号 |
H04B15/00 |
主分类号 |
H04B15/00 |
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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