Question

For an amplifier, midband gain = 100 and lower cut-off frequency is 1 kHz. Find the gain of the amplifier at frequency = 20 Hz.

Answer 1

Answer:

Once the circuit has been through the initial

stages of design, improvements can be made

to get the design to match specific criteria.

This design represents a basic audio amplifier,

and therefore it should at least conform to the

following very basic requirements. The gain (at

the mid band frequency of 1kHz) should be of a

specific value, this requirement would depend

on the overall system design, of which this is

only a single stage, but for this exercise:

Required Gain = 50

Bandwidth = 20Hz to 20kHz

Max. Undistorted Output Vpp > 70% of VCC

MARK ME AS BRAINLIESTED PLEASE

Answer 2

Answer:

The gain is 2HZ

Explanation:

To find the gain of the amplifier need to put the values in the formula:

midband gain /root 1+cut of frequency

Given: Midband gain is 100 and the last cut off frequency is 1 kHZ

Find: Gain of the amplifier when the frequnecy is 20Hz

Solution:

midband gain /root 1+cut of frequency

$\frac{100}\sqrt{1}+ ({100}/ {20} )^{2}$

$\frac{100}\sqrt {2501}$

$\frac{100}{50} =2$

So, the final answer is 2HZ

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