IEVref: 561-03-35 ID: Language: en Status: Standard Term: symmetry Synonym1: mark/space ratio [Preferred] Synonym2: duty cycle [Preferred] Synonym3: Symbol: Definition: ratio between the time period (t1), in which the output voltage is above a specified level, and the time period (t2), in which the output voltage is below the specified level Figure 17 – Characteristics of an output waveform Note 1 to entry: The symmetry is expressed in percent of the duration of the full signal period. Note 2 to entry: The specified level may be the arithmetic mean between levels VOL and VOH, or 50 % of the peak-to-peak amplitude. The ratio is expressed as: $\frac{100\text{ }\text{ }\text{ }\text{ }{t}_{1}}{{t}_{1}+{t}_{2}}:\frac{100\text{ }\text{ }\text{ }\text{ }\text{ }{t}_{2}}{{t}_{1}+{t}_{2}}$ Publication date: 2014-11 Source: Replaces: Internal notes: CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: