| 释义 |
square wave A periodic wave that assumes one of two fixed, discrete values for equal lengths of time, with each value or group of values representing a digital bit. For example, a given signaling protocol might represent a one (1) bit as +3V (volts) and a zero (0) bit as –3V, with each bit measured at a precise moment in time for a specific duration known as a bit time. This is in stark contrast to an analog signal, which flows smoothly and continuously from zero voltage (0V) to its maximum positive voltage (+3V), back to zero (0V), to its maximum negative voltage (–3V), and back to zero (0V). Figure S-8 shows an analog waveform that varies in frequency and the digital representation of that waveform, with each set of low frequency signals depicted as a 0 bit and each set of high frequency signals as a 1 bit. See also digital and sine wave. |