Answer / abhishek gupta

in amplitude modulation theamplitude of carrier signal
varies...where as phase n frequency r kept constant where
as in angle modulation frequency and phase of the carrier
signal varies linearly with the message signal...where
amplitude is kept constant .

Answer / vvtiet

In amplitude Modulation as the amplitude of given signal
varies, the amplitude of carrier signal also varies in the
same way.

In angle modulation, the frequency or phase may vary
acorsing to the amplitude of given signal.

Answer / sumit narula

In amplitude modulation, the amplitude of the carrier
signal is varied according to the modulating signal a and
other characteristics of signal(frequncy and phase) are
kept constant,
but in angle modulation, the phase or frequency of the
carrier signal is varied according to the modulating signal
and amplitude is kept constant.

Answer / barkha tyagi

in amplitude modulation the amplitude of carrier signal is
changed according to the madulating signal.
but in angle modulation the phase or frequeny of carrier
wave is changed according to the modulating wave.

Answer / vinay kr. singh

In amplitude modulation,the amplitude of carrier signal is
changed according to the madulating signal but phase frq.is
constant
but in angle modulation the phase or frequeny of carrier
wave is changed according to the modulating wave &
amplitude is constant.

Answer / tariq

Angle Modulation is modulation in which the angle of a
sine-wave carrier is varied by a modulating wave. Frequency
Modulation (FM) and Phase Modulation (PM) are two types of
angle modulation. In frequency modulation the modulating
signal causes the carrier frequency to vary. T. In phase
modulation the phase of the carrier is controlled by the
modulating waveform.
In amplitude modulation, the amplitude of the carrier
signal is varied according to the modulating signal a and
other characteristics of signal(frequncy and phase) are
kept constant

Answer / vasanta

In Amplitude modulation , the bandwidth is lessthan or
equal to twice the highest frequency of message
signal.so,that in AM S/N ratoi is less. But,In angle
modulation, the bandwidth is graterthan twice the highest
frequency of message so,that we can increase the S/N ratio.

Answer / hans raj

The major difference between angle modulation and amplitude
modulation is the variation of amplitude,frequency and phase.

As in amplitude modulation the amplitude of the carrier
varies in accordance to the modulating signal but in case of
angle modulation the frequency and phase of the carrier
signal varies in accordance to modulating signal but the
amplitude of carrier remains same.
for further clarifications we can refer their (angle
modulation and amplitude modulation)output waveforms.

Answer / subhash.r

amplitude modulation: process of changing
the amplitude of high frequency carrier signal in proportion
with instantaneous value of modulating signal here phase and
frequency kept constant.
where as in angle modulation changing the phase r frequency
of the carrier signal varies with message signal i.e,
modulating signal here amplitude kept constant.

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