A difference amp is to be designed to amplify the difference between 2 voltages by a factor of 20. The i/ps each app equal to 2v. Determine suitable resistor values for dc using IC 741.

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A difference amp is to be designed to amplify the difference between 2 voltages by a factor of 20. The i/ps each app equal to 2v. Determine suitable resistor values for dc using IC 741.

written 5.5 years ago by

teamques10 ★ 64k

• modified 4.4 years ago

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electronic circuits and communication

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written 5.5 years ago by

teamques10 ★ 64k

The gain of the difference amp is :

Gain= $\frac{R_2}{R_1}$

$∴20=\frac{R_2}{R_1}$ or $R_2=20R_1$

Let $R_1=1 kΩ$ and $R_2=20kΩ$

For proper operation of the circuit.

$R_u=R_2=20kΩ$ and $R_3=R_1=1kΩ$

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