Calculateur de Débit SPI
Calculez le débit de données d'une interface SPI.
Rapport cyclique
50.0 %
Duty Cycle vs On Time (Pulse Width)
Formule
## 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.
Exemple Résolu
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
Questions Fréquentes
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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