An audio signal is modulated by a carrier wave of 20 MHz such that the bandwidth required for modulation is 3 kHz. Could this wave be demodulated by a diode detector which has the values of R and C as
(i) R = 1 kΩ, C= 0.01 µF?
(ii) R= 10 kΩ, C=0.01 µF?
(iii) R = 10 kΩ, C = 0.1 µF?
An audio signal is modulated by a carrier wave of 20 MHz such that the bandwidth required for modulation is 3 kHz. Could this wave be demodulated by a diode detector which has the values of R and C as
(i) R = 1 kΩ, C= 0.01 µF?
(ii) R= 10 kΩ, C=0.01 µF?
(iii) R = 10 kΩ, C = 0.1 µF?
Frequency of career wave is 20MHz
Bandwidth require for modulation is 3kHz/2= 1.5kHz
For demodulating we need to reciprocal it
1/f= 1/20MHz= 0.5 10-7s
For modulation = 1/1.5KHz= 0.7 103s
According to first option =RC= 1 0.01= 10-5s
So it will demodulated
According to 2nd option- RC= 10-4s
So it can al
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