发明名称 |
Anti-pop circuit for AC amplifiers |
摘要 |
The anti-pop circuit includes a unity gain buffer with an input coupled to the source of the reference voltage and an output coupled to the input of the amplifier to accelerate the charging of the input coupling capacitor of the amplifier at every turn-on. The capacitor-charging buffer is automatically disabled before the turning-on of the amplifier. The charging buffer may be enabled at start up by generating an impulse of a pre-established duration at the turn-on instant by a monostable circuit or by disabling it upon verifying the decaying to zero of the charging of current of the input coupling capacitor. The circuit eliminates the popping noise at the turn-on without an excessive delay of the turning-on of the amplifier.
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申请公布号 |
US6255904(B1) |
申请公布日期 |
2001.07.03 |
申请号 |
US19990461163 |
申请日期 |
1999.12.14 |
申请人 |
STMICROELECTRONICS S.R.L. |
发明人 |
CAPODIVACCA GIOVANNI;BRAMBILLA DAVIDE |
分类号 |
H03F1/30;(IPC1-7):H03F1/14;H03F21/00 |
主分类号 |
H03F1/30 |
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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