发明名称 |
RECEIVER/SENDER FOR SIGNALLING BETWEEN TELEPHONE SWITCHING FACILITIES |
摘要 |
<p>A universal receiver/sender is achieved by providing circuitry having parameters setable by binary data words from the data processing unit of a switching facility. A clock signal generator provides output signals corresponding to respective binary instruction words whereas the parameters of an analogue signals receiving circuit are controlled by binary control words. A plurality of commutating filter circuits receive pass band limited analogue signals from the receiving circuit and under control of signals from the clock generator provide binary output signals indicative that a signal within a predetermined pass band has been received. Also provided is a data store for storing the required instruction and control words as well as the output signals form the filter circuits. In addition, a signal generating circuit is responsive to predetermined clock signals to generate substantially sinusoidal signals each having a frequency directly proportional to the pulse repetition frequency of the respective clock signal.</p> |
申请公布号 |
CA1053821(A) |
申请公布日期 |
1979.05.01 |
申请号 |
CA19760259463 |
申请日期 |
1976.08.19 |
申请人 |
NORTHERN TELECOM LIMITED |
发明人 |
OLSEN, ROLF E.;MUNTER, ERNST A. |
分类号 |
H04Q1/30;H04M1/50;H04Q1/457;(IPC1-7):04Q1/40;04M1/50 |
主分类号 |
H04Q1/30 |
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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