发明名称 |
Circuit for storing the energy of an applied signal for use in a telephone annunciator. |
摘要 |
<p>An annunciator is disclosed which has an improved charging circuit for storing the energy of a ring signal received via an improved Schottky diode bridge rectifier, and an oscillator-driven variable divider which actuates an audible output device when the stored charge exceeds a threshold level (Fig. 1).</p> |
申请公布号 |
EP0030739(A1) |
申请公布日期 |
1981.06.24 |
申请号 |
EP19800107982 |
申请日期 |
1980.12.17 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
BUSS, KENNETH;CULP, NORMAN L. |
分类号 |
H04M1/00;H04M19/04;(IPC1-7):04M19/04 |
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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