The invention provides a healthy physical therapy chip module as an implementing method of the low-frequency modulation pulse physical therapy.

本发明提供一种健康理疗芯片模块，作为低频调制脉冲理疗技术的一种实 现手段。

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LFM (Linear Frequency Modulation) pulse is a kind of important large time-bandwidth product signal and commonly used in modern radar system.

线性调频脉冲是现代雷达系统中常用的一种重要的大时宽-带宽积信号。

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Pulse-code modulation is simply a way of representing the analog electrical signal, in digital form.

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While it's always hard to pin down the exact origins of an idea -- especially one like pulse-code modulation, where a number of parties were involved -- sifting out the large and significant contributions from the gold pan of history tends to bring up the same names time and again.

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Shannon would also contribute to the further development of pulse-code modulation (along with Bell alumni Bernard M Oliver and John R Pierce) at around the same time, using technology that eliminated some of the issues (such as complex circuitry) from the earlier, but conceptually similar, implementation from Briton Alec Reeves in 1938.

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