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Cycle-modulating type of dual-tone multifrequency generator
Cycle-modulating type of dual-tone multifrequency generator
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机译:周期调制型双音多频发生器
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摘要
A cycle-modulating DTMF generator for generating a DTMF signal; the generator comprises a programmable time-pulse generator, counters or up/down counters, a memory unit for storing data, a digital adder, and a digital-to-analog converter. The circuit of such generator is substantially a digital circuit so as to overcome the problem of signal distortion, which usually exists in an analog circuit.
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