Frequency Modulation
START
STOP
MODULATE
DEMODULATE
Message Signal
m(t)=A
m
cos(2πf
m
t)
Message Signal Amplitude
10
Volts
Message Signal Frequency
3000
Hz
Carrier Signal
c(t)=A
c
cos(2πf
c
t)
Frequency Deviation
10
Carrier Signal Frequency
20
KHz
Frequency Modulated Signal
Result
s(t)=A
m
cos(2πf
c
t+(Δ/fm)sin(2πf
m
t))
Modulation Index μ=Δ/fm =
Frequency Modulated Signal
Message Signal
m(t)=A
m
cos(2πf
m
t)
Message Signal Amplitude
10
Volts
Message Signal Frequency
3000
Hz
Frequency Deviation
10
Carrier Signal Frequency
20
KHz
Result
s(t)=A
m
cos(2πf
c
t+(Δ/fm)sin(2πf
m
t))
Modulation Index μ=A
m
/A
c
=