| 发明名称 |
RINGER CIRCUIT AND COMMON DISPLAY CIRCUIT IN TELEPHONE SETS OPERATING WITH 2 LINES |
| 摘要 |
The circuit detects any line ring signal and drives common tone ringer circuit for indicating signal line. The discerning line indication utilizes the selecting timbre by adjusting time constant of oscillator. The tone ringer circuit (40), oscillator (60), indicator are commonly used.
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| 申请公布号 |
KR890002195(B1) |
申请公布日期 |
1989.06.22 |
| 申请号 |
KR19860002205 |
申请日期 |
1986.03.25 |
| 申请人 |
SAMSUNG ELECTRONICS CO. LTD. |
发明人 |
LEE HA-UN |
| 分类号 |
H04M1/00;(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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