SPI数据速率计算器
使用此SPI数据速率计算器快速获得准确的计算结果。
占空比
50.0 %
Duty Cycle vs On Time (Pulse Width)
公式
## What is Duty Cycle? Duty cycle is the fraction of one period during which a signal is in its active (high) state. ### Formula **Duty Cycle = On Time / Period x 100%** **Off Time = Period - On Time** Duty cycle is fundamental to PWM (Pulse Width Modulation), which controls motor speed, LED brightness, and power delivery by varying the on-time while keeping frequency constant.
计算示例
A 1 kHz signal with 500 microsecond on-time.
- 01Duty cycle: 500 / 1000 x 100 = 50.0%
- 02Off time: 1000 - 500 = 500 microseconds
- 03Frequency: 1,000,000 / 1000 = 1000 Hz
常见问题
What is 50% duty cycle?
A square wave where the signal is high for exactly half the period. This is the most common starting point for PWM.
How does duty cycle relate to average voltage?
The average voltage equals duty cycle times the peak voltage: V_avg = Duty x V_peak.
Can duty cycle be over 100%?
No. Duty cycle ranges from 0% (always off) to 100% (always on). Values outside this range indicate an error in measurement.
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