发明名称 |
Receiving section of a telephone |
摘要 |
A processing unit with balanced outputs transfers a received digital signal to an amplification unit with balanced inputs and outputs. A control unit enables or disables the processing and amplification units in response to a power up/power down signal. To prevent disturbances due to power up/power down transients from appearing in a speaker connected between the outputs of the amplification unit, switches are provided between the outputs of the processing unit and the inputs of the amplification unit. A delay circuit generates according to a predetermined timing program enabling/disabling control signals for the processing and amplification units, and generates control signals for the switches.
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申请公布号 |
US6697612(B2) |
申请公布日期 |
2004.02.24 |
申请号 |
US20000570877 |
申请日期 |
2000.05.15 |
申请人 |
STMICROELECTRONICS S.R.L. |
发明人 |
NICOLLINI GERMANO;PERNICI SERGIO |
分类号 |
H03G3/34;H04B1/10;H04M1/60;H04M1/72;(IPC1-7):H04B1/10 |
主分类号 |
H03G3/34 |
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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