An ideal amplifier with gain A and bandwidth 10 MHz is connected in cascade with two similar amplifiers. The overall 3-dB bandwidth of the amplifier is equal to ____ MHz.
6.436

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Solution

The correct option is A 6.436
$(B . W)_{new} = (B . W)_{old} \sqrt{2^{1 / n} - 1}$
$(B . W)_{new} = 10 \times 10^{6} \times \sqrt{2^{1 / 2} - 1}$
$= 6.436 M H z$

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An ideal amplifier with gain A and bandwidth 10 MHz is connected in cascade with two similar amplifiers. The overall 3-dB bandwidth of the amplifier is equal to ____ MHz.6.436

The correct option is A 6.436(B.W)new=(B.W)old√21/n−1 (B.W)new=10×106×√21/2−1 =6.436 MHz

An ideal amplifier with gain A and bandwidth 10 MHz is connected in cascade with two similar amplifiers. The overall 3-dB bandwidth of the amplifier is equal to ____ MHz.
6.436

The correct option is A 6.436
$(B . W)_{new} = (B . W)_{old} \sqrt{2^{1 / n} - 1}$
$(B . W)_{new} = 10 \times 10^{6} \times \sqrt{2^{1 / 2} - 1}$
$= 6.436 M H z$