| 发明名称 |
Acoustic feedback suppression device particulary for auxiliary ringers in plug-in telephone systems |
| 摘要 |
An acoustic feedback suppression device, particularly for auxiliary ringers in plug-in telephone systems, includes diodes in addition to a rectifier bridge of the ringer. The circuit provides direct-current decoupling and limits the AC voltage present across the auxiliary ringer.
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| 申请公布号 |
US5459783(A) |
申请公布日期 |
1995.10.17 |
| 申请号 |
US19930017790 |
申请日期 |
1993.02.16 |
| 申请人 |
SGS-THOMPSON MICROELECTRONICS S.A. |
发明人 |
CONSIGLIO, PIETRO;ANTONINI, CARLO |
| 分类号 |
H04M1/31;H04M1/74;H04M19/04;(IPC1-7):H02H9/00 |
主分类号 |
H04M1/31 |
| 代理机构 |
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代理人 |
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| 地址 |
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