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Question: An amplitude modulated wave is as shown in the figure the value of peak carrier voltage and value of...

An amplitude modulated wave is as shown in the figure the value of peak carrier voltage and value of peak information voltage are respectively.

A

30 V, 20 V

B

10 V, 15V

C

15 V, 30 V

D

20 V, 25 V

Answer

30 V, 20 V

Explanation

Solution

:

From figure

Vmax=1002=50Vmin=202=10VV_{\max} = \frac{100}{2} = 50 \Rightarrow V_{\min} = \frac{20}{2} = 10V

Peak carrier voltage

Vc=Vmax+Vmin2=50+102=30 VV _ { c } = \frac { V _ { \max } + V _ { \min } } { 2 } = \frac { 50 + 10 } { 2 } = 30 \mathrm {~V}

Modulation index

Peak information voltage,

Vm=μVc=23×30=20VV_{m} = \mu V_{c} = \frac{2}{3} \times 30 = 20V