Which of the following system is analog modulation system?
a)PCM
b)differential PCM
c)Delta
dPWM
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Out of all given options, Pulse width modulation (PWM) is an analog modulation system.
Option (d)
Explanation:
- PWM process is to generate output signals of low frequency from input pulses of high frequency.
- The process which is used in various communication systems to encode the signal amplitude of another signal, basically an input signal, by pulse width or duration.
- PWM signals are mainly used to manage DC motors, as well as to manage hydraulics, valves, pumps, and for some mechanical equipment.
- It works on pulsing DC currents and varying its ‘on’ time to manage current flow in a device.
- In general, analog modulation is the transmission of a low-frequency signal like audio, television signal) over a higher one.
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