发明名称 |
Method and apparatus for protecting a switching amplifier from excess current |
摘要 |
A class D switching amplifier has a pulse width modulator that drives a speaker. The amplifier includes an over-current protection circuit, which includes current-monitoring MOSFETs that are each in parallel with one of four power MOSFETs. Signals taken from one side of the current-monitoring MOSFETs go to a logic circuit that removes the amplifier input circuit when the logic circuit indicates that an over-current condition is present. Current through the current-monitoring MOSFETs also goes through the speaker, thus improving amplifier efficiency.
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申请公布号 |
US7157968(B2) |
申请公布日期 |
2007.01.02 |
申请号 |
US20050030776 |
申请日期 |
2005.01.05 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
SHIN JAEYOUNG |
分类号 |
H03F1/52;H03F3/217;H03F3/38 |
主分类号 |
H03F1/52 |
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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