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In an oscillator, for sustained oscillat...

In an oscillator, for sustained oscillations, Barkhausen criterion is `Abeta` equal to (A = voltage gain without feedback and `beta` = feedback factor)

A

zero

B

less than 1

C

one

D

infinity

Text Solution

Verified by Experts

The correct Answer is:
C
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In a negative feedback amplifier, the gain without feedback in 100 , feed back ratio is 1//25 and input voltage is 50 m V . Calculate (i) gain with feedback (ii) feedback factor (iii) output voltage (iv) feedback voltage (v) new input voltage so that output voltage with feedback equals the output voltage without feedback.

The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be :-

Knowledge Check

  • The voltage gain of an amplifier with 9% negative feedback is 10 . The voltage gain without feedback will be

    A
    `90`
    B
    `10`
    C
    `1.25`
    D
    `100`

  • The voltage gain of an amplifier with 9\% negative feedback is 10. The voltage gain without feedback will be

    A
    100
    B
    90
    C
    10
    D
    1.25

  • The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be

    A
    90
    B
    100
    C
    9
    D
    10

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