发明授权
- 专利标题： Telephone subscriber system
- 专利标题（中）： 电话用户系统
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申请号： US09475804申请日： 1999-12-30
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公开(公告)号： US06873702B1公开(公告)日： 2005-03-29
- 发明人: Walter Rossi , Ferdinando Lari , Carlo Antonini , Pietro Consiglio , Luigi Vergani
- 申请人： Walter Rossi , Ferdinando Lari , Carlo Antonini , Pietro Consiglio , Luigi Vergani
- 申请人地址： IT Agrate Brianza
- 专利权人： STMicroelectronics S.r.l.
- 当前专利权人： STMicroelectronics S.r.l.
- 当前专利权人地址： IT Agrate Brianza
- 代理机构： Seed IP Law Group PLLC
- 代理商 Lisa K. Jorgenson; Robert Iannucci
- 优先权： EP98830808 19981231
- 主分类号： H04M19/02
- IPC分类号： H04M19/02 ; H04M1/00 ; H04M9/00 ; H04M9/08
摘要：
A subscriber's telephone system is presented that includes at least one driver circuit connected to Tip and Ring terminals. An additional network is connected between an output of the driver circuit and the Ring terminal. This additional network includes a suitably dimensioned capacitor and a diode limiter connected in parallel with each other to minimize the overall voltage while maintaining a desired battery mean value.
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