AM Modulation — Interactive Demo | ECE 315

1.00 α

Mod. Index 1.000

Efficiency 33.3%

AM Signal

s(t) = A_c[m(t) + b] cos(2πf_ct)

Modulation Index

α = A_m / b

Efficiency

η = α² / (α² + 2)

Message Signal

Amplitude A_m 10.0 V

01020 V

Frequency f_m 2.0 kHz

1510 kHz

DC Bias b 10.0 V

02550 V

Carrier Signal

Amplitude A_c 25.0 V

02550 V

Frequency f_c 50.0 kHz

150100 kHz

Message Signal m(t)

Carrier Signal c(t)

AM Output s(t) Envelope

Message Spectrum M(f)

Carrier Spectrum C(f)

Output Spectrum S(f)