发明名称 |
NOISE-REDUCING CIRCUIT |
摘要 |
The noise reducing circuit for a subscriber line interface includes a hook-on detector for obtaining the absolute value of the current difference between output signals output by a subscriber telephone to telephone lines and detecting the hook on of the subscriber telephone with the magnitude of the absolute value, and a gain controller for controlling the amplified gain of a differential amplifier according to the output of the hook-on detector, thereby simplifying the configuration of circuit.
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申请公布号 |
KR940000451(B1) |
申请公布日期 |
1994.01.21 |
申请号 |
KR19910003946 |
申请日期 |
1991.03.12 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
KIM, KYONG - UK;JONG, JONG - DOK |
分类号 |
H04M1/00;H04M1/74;(IPC1-7):H04M1/00 |
主分类号 |
H04M1/00 |
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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