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How do you find the period of a pulse train?
Note the width, in seconds or microseconds, of each pulse. This is the pulse width, or PW, of the signal. Calculate the period, or “T”, of the frequency, or “f,” using the formula: T = 1/f. For example, if the frequency is 20 hz, then T = 1/20, with a result of 0.05 seconds.
What is the formula for pulse duration?
Pulse duration: Time it takes for one pulse to occur = period times the number of cycles in the pulse.
What is the period of a pulse?
Period: – This is the length of time in seconds that the waveform takes to repeat itself from start to finish. This value can also be called the Periodic Time, ( T ) of the waveform for sine waves, or the Pulse Width for square waves.
How is PWM duty cycle calculated?
The proportion of 1s to 0s in PWM is called the duty cycle. To determine the proportional PWM output voltage, use this formula: (Duty ÷ 256) x 5 V. For example, if Duty is 100, (100 ÷ 256) x 5 V = 1.953 V; PWM outputs a train of pulses whose average voltage is 1.953 V.
What are the units of pulse duration?
Pulse duration is the time that a pulse is “on” and is typically measured in microseconds (us). Spatial pulse length is the distance of the pulse end to end, typically measured in millimeters (mm).
How to calculate the length of a pulse train?
Plot a 10 kHz Gaussian RF pulse with 50% bandwidth, sampled at a rate of 10 MHz. Truncate the pulse where the envelope falls 40 dB below the peak. The pulse repetition frequency is 1 kHz, the sample rate is 50 kHz, and the pulse train length is 25 ms. The gain factor is a sinusoid of frequency 0.1 Hz.
How is the duty cycle of a pulse measured?
Duty Cycle describes the “On Time” for a pulsed signal. We can report duty cycle in units of time, but usually as a percentage. Like Pulse Width and Repetition Frequency, a signal’s duty cycle is a calculated value; not directly measured. To calculate a signal’s duty cycle, we need to know the signal’s pulse width and repetition frequency.
What is the repetition frequency of a pulse train?
The repetition frequency is 0.5 Hz, the signal length is 60 s, and the sample rate is 1 kHz. The gain factor is a sinusoid of frequency 0.05 Hz. This example generates an asymmetric sawtooth waveform with a repetition frequency of 3 Hz. The sawtooth has width 0.2 s and skew factor –1. The signal length is 1 s, and the sample rate is 1 kHz.
How often does a pulse train occur in MATLAB?
Display a generated pulse, sampled at 0.1 kHz for 1 second, with a frequency and damping value equal to 50. Use the pulstran function to generate a train of custom pulses. The train is sampled at 0.1 kHz for 125 seconds. The pulses occur every 25 seconds and have exponentially decreasing amplitudes.