发明名称 |
APPARATUS FOR SYNTHESIZING PHASE-MODULATED CARRIER WAVE |
摘要 |
<p>APPARATUS FOR SYNTHESIZING PHASE-MODULATED CARRIER WAVE Digital logic apparatus for synthesizing a phasemodulated carrier wave wherein phase shifts between successive carrier-wave segments encode data elements. Carrier-wave segments having different phases are stored in the form of digitally encoded samples in a memory, A digital-to-analog converter is connected to convert sequentially read samples of selected segments into the phase-modulated carrier wave. A combinational logic circuit selects each segment to be addressed according to an applied data element and the phase of the previously selected segment. Means are provided to overlap and blend successively addressed segments to provide smooth phase transitions in the synthesized wave.</p> |
申请公布号 |
CA1057858(A) |
申请公布日期 |
1979.07.03 |
申请号 |
CA19750224878 |
申请日期 |
1975.04.17 |
申请人 |
TELETYPE CORPORATION |
发明人 |
GLASSON, JERRY M;KABB, HAROLD L. |
分类号 |
H04L27/18;H04L27/20;(IPC1-7):04L27/20;03K13/02 |
主分类号 |
H04L27/18 |
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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