Maulana Azad Na onal Ins tute of Technology, Bhopal
Department of Electronics & Communica on Engineering
Assignment 1
Programme: B.Tech/ECE/4th semester
Subject: Linear Integrated Circuits
Last Date of Submission: 23 Jan
1. The circuit shown in (a) can be used to implement a transresistance amplifier.
Find the value of the input resistance Ri, the transresistance Rm, and the output
resistance Ro of the transresistance amplifier. If the signal source shown in (b)
is connected to the input of the transresistance amplifier, find the amplifier
output voltage.
2. For the circuit shown below, determine the values of v1, i1, i2, vO, iL, and iO. Also
determine the voltage gain vO/vI, current gain iL /iI, and power gain PO/PI.
3. For the circuit shown below, determine the values of v1, i1, i2, vO, iL, and iO. Also
determine the voltage gain vO/vI, current gain iL /iI, and power gain PO/PI.
Linear Integrated Circuits
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4. The input voltages of an op-amp are v2 = 1005 µV and v1 = 995 µV. The op-amp
parameters are CMRR = 100 dB and Ad = 2*105. Determine (a)the differen al
voltage vd, (b)the common-mode voltage vc, (c)the magnitude of the commonmode gain Ac, and (d)the output voltage vO.
5. Show that for the inver ng amplifier if the op-amp gain is A, the input resistance
is given by Rin =R1 + (R2/(A+1)).
6. (a) Design an inver ng amplifier with a closed-loop gain of −200 V/V and an
input resistance of 1 kohm. (b) If the op amp is known to have an open-loop
gain of 5000 V/V, what do you expect the closed-loop gain of your circuit to be
(assuming the resistors have precise values)?
7. Fig. shows an op-amp that is ideal except for having a finite open-loop gain and
is used to realize an inver ng amplifier whose gain has a nominal magnitude G
=R2/R1. To compensate for the gain reduc on due to the finite A, a resistor Rc is
shunted across R1. Show that perfect compensa on is achieved when Rc is
selected according to-
End