第1题
读出英文,说出中文意思,整个过程录音并上传 1、A periodic waveform is one that repeats itself at a fixed interval, called a period (T ). The frequency (f ) is the rate at which it repeats itself and is measured in hertz (Hz). The relationship between f and T is expressed as follows: 2、In digital systems, all digital waveforms are synchronized with a basic timing waveform, called the clock. The clock is a periodic waveform. The clock waveform itself does not carry infor
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