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  • Stuck here, help me understand: A diode detector is used to detect an amplitude modulated wave of 60% modulation by using a condenser of capacity 250 pico farad in parallel with a load resistance 100 kilo ohm. Find the maximum modulated frequency whi

A diode detector is used to detect an amplitude modulated wave of 60% modulation by using a condenser of capacity 250 pico farad in parallel with a load resistance 100 kilo ohm. Find the maximum modulated frequency which could be detected by it.

 

 

  • Option 1)

    5.31 kHz

  • Option 2)

    10.62 MHz

  • Option 3)

    10.62 kHz

  • Option 4)

    5.31 MHz

 

Answers (1)

best_answer

As we have learned

Modulation -

It is the process carried out at transmitter in which the low frequency message signal is superimposed on a high frequency carrier signal.

- wherein

 

 We know that 

f = \frac{1 }{ 2 \pi \mu \tau }

\tau }= RC

 f = \frac{1 }{ 2 \pi \mu RC }

 \mu = 0.6 \\ R = 100 K \Omega , c = 250 \times 10^{-12}F

f = \frac{1}{9.42 \times 10^{-5}} = 10.61 KHz

 

 

 

 


Option 1)

5.31 kHz

Option 2)

10.62 MHz

Option 3)

10.62 kHz

Option 4)

5.31 MHz

Posted by

Avinash

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