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What type of modulation produces pulses whose duration is proportional to the amplitude of the intelligence signal?
Wiki User
∙ 12y ago
Pulse-Amplitude Modulation
Wiki User
∙ 12y ago
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What is the difference white noise and impulse noise?
Thermal noise occurs in all transmission media and all communication equipment, including passive devices. It arises from random electron motion and is characterized by a uniform distribution of energy over the frequency spectrum with a Gaussian distribution of levels. Noise. Impulse noise is noncontinuous, consisting of irregular pulses or noise "spikes" of short duration, broad spectral density, and relatively high amplitude.
What is the duration of a construction helmet?
Two years
A pulsed laser produces 47mj per pulse. The pulse repetition time is 2.5ms and the duty cycle is .008. Find the pulse duration?
(shiwwasuji@gmail.com)Duty Cycle DC is the ratio of pulse duration to the pulse repetition time periodDuty Cycle DC = pulse duration (t)/pulse repetition time period (T)Pulse Duration (t) = 0.008 x 2.5 ms
How long does current flow in one direction when sixty herts is used?
When 60 hertz current is used, current flows in one direction for half a second. This is because for 60 Hz frequency, polarity changes 60 times in a second, meaning it flows in either direction for 500 Ms.
In which major section of the contract is the time duration specified?
in special conditions
What is the duration of The Intelligence Men?
The duration of The Intelligence Men is 1.73 hours.
What is the duration of Intelligence TV series?
The duration of Intelligence - TV series - is 3600.0 seconds.
What is the duration of A.I. Artificial Intelligence?
The duration of A.I. Artificial Intelligence is 2.43 hours.
Which of these is associated with a sound's loudness?
Loudness is affected by parameters other than sound pressure, including frequency and duration. also sound wave amplitude
What bit rate are peugoet immobilizer codes sent at?
i need to know what baud rate or pulse width modulation duration immobilizer codes are sent at
What are the four properties of musical sounds and their definitions?
Trick Question. There are only two properties of sound. The "tamber," which is the noticeable "Tone" differences between instruments. IE: The sound a guitar makes and the sound a piano makes. And the second properties is the frequency of the sound. Also known as the "Pitch."
Why are surface waves more detructive to buildings tan p waves or s waves are?
Because of their low frequency, long duration, and large amplitude
What is involved in interpreting EMG results?
The interpretation of EMG results is not a simple matter, requiring analysis of the onset, duration, amplitude, and other characteristics of the spike patterns.
Why does jendrassik's manoeuvre alter the amplitude of the reflex response?
It increases the reflex, as the subject is distracted by performing the manoeuvre and is said to prevent conscious anticipation of the reflex. Generally it should cause an increase in the duration and the magnitude of the reflex.
What is the difference between pulse duration modulation and pulse density modulation?
Both reproduce analog waveforms by switching between 2 values at a much higher rate than the signal itself changes.Pulse duration modulation is a synonym for pulse-width modulation or PWM. The switching frequency is usually constant, and the width or duration of the "high" state determines the output. For instance, if the width is 100%, it is always high, and produces the highest analog value possible. If the width is 50%, it spends half of its time high and half low, producing a halfway voltage. If the width is 0%, it stays low all the time, producing the lowest possible voltage.Pulse density modulation uses a feedback loop to track the analog output voltage, switching low when the output is too high and high when the output is too low.To produce a 50% voltage, with an equivalent resolution of 8-bits, a PWM waveform will turn on for 128 clock cycles and then off for 128 cycles. A PDM waveform with the same clock rate would alternate between on and off every other cycle. The average of both waveforms is 50%, but the PDM waveform switches more often. For 100% output or 0% output, they are identical.
What are four qualities of tone?
Amplitude - perceived in terms of loudness /dB/ - the greater the amplitude is the louder the sound. Frequency - the number of oscillations per second. the higher the frequency is the higher on scale of pitch. It perceived in terms of pitch /Hz/ Simplicity/complexity - combination of amplitude and frequency. complex sound waves involve waves of different frequencies superimposed to one another. it is perceived as Quality of sound. Wave lenght - duration of time. reflection of sound wave : Quantity /m per sec/
Do action potentials always have the same amplitude and the same duration?
Yes, this is due to the all or nothing law that neurons follow: "an excitable membrane either responds to a stimulus with a maximal action potential that spreads nondecrementally throughout the membrane, or it does not respond with an action potential at all." "
