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Lecture 3 AE

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7 views23 pages

Lecture 3 AE

cc

Uploaded by

ankush02481
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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In case of voltage-series feedback amplifier, the input

resistance of the amplifier with negative feedback is


given as

A. Rif = Ri (1+Av)
B. Rif = Ri (1+ Av β)
C. Rif = Ri /(1+ Av β)
D. Rif = Ri (1+ β)
Answer : B
In case of voltage-series feedback amplifier, the output
resistance of the amplifier with negative feedback is
given as

A. Rof = Ro (1+ Av)


B. Rof = Ro (1+ Av β)
C. Rof = Ro /(1+ Av β)
D. Rof = Ro (1+ β)
Answer : C
In case of current-series feedback amplifier, the input
resistance of the amplifier with negative feedback is
given as

A. Rif = Ri (1+ GM)


B. Rif = Ri (1+ β GM)
C. Rif = Ri /(1+β GM)
D. Rif = Ri (1+ β)
Answer : B
In case of current-series feedback amplifier, the output
resistance of the amplifier with negative feedback is
given as

A. Rof = Ro (1+ Gm)


B. Rof = Ro (1+ β Gm)
C. Rof = Ro /(1+β Gm)
D. Rof = Ro (1+ β)
Answer : B

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