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I - V characteristics of four devices ar...

`I - V` characteristics of four devices are shown in Fig.




Identify devices that can be used for modulation :

A

`'I' and 'iii'`

B

`only 'iii'`

C

` ii' and some region of 'iv'`

D

All the devices can be used

Text Solution

Verified by Experts

The correct Answer is:
C
Here , (i) represents Ideal modulation related to triode valve for linear plate modulation . (ii) represents square law diode modulation . (iii) represents constant current source (iv) represents part of it as square law modulation .
Thus , for modulation (ii) and some regions of (iv) can be used .
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Knowledge Check

  • 1-V characteristics of four devices are shown in figure. Identify devices that can be used for modulation

    A
    (i) and (iii)
    B
    Only (iii)
    C
    (ii) and some regions of (iv)
    D
    All the devices can be used

  • Modem is a device used for

    A
    modulating signals
    B
    converting analog signals to digital signals
    C
    either of the above
    D
    none of the above

  • Modem is a device used for

    A
    Converting digital signals to analog signals
    B
    Converting analog signals to digital signals
    C
    Either of these
    D
    None of these