发明名称 |
Conference circuit with digital-analog and analog-digital conversion |
摘要 |
A circuit arrangement is disclosed for converting digital signals into analog signals and analog signals into digital signals. The circuit arrangement is used as a conference set for use by individual subscribers on a multiplex line. Digital signals of all subscribers are consecutively converted into analog signals and an analog summation signal is formed therefrom. This summation signal is again converted back into a digital signal and can be multiply transmitted as such. Alternatively, a number n of circuit arrangements are provided for a maximum number n of subscribers. Each of the circuit arrangements converts digital signals of n-1 conference subscribers (excluding an allocated subscriber) into analog signals and forms an analog summation signal therefrom. This analog summation signal is converted back into a digital signal which is transmitted in a time slot allocated to the allocated conference subscriber to which the circuit arrangement is allocated.
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申请公布号 |
US4160878(A) |
申请公布日期 |
1979.07.10 |
申请号 |
US19780926197 |
申请日期 |
1978.07.19 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
HIRSCHMANN, PETER;HOEFER, ERNST |
分类号 |
H03M1/02;H03M1/38;H04B14/04;H04M3/56;(IPC1-7):H04M3/56 |
主分类号 |
H03M1/02 |
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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