Electric Circuits II
Operational Amplifiers Sheet
Problem # 1
Calculate ix and vo in the circuit of
Fig 1. Find the power dissipated
by the 60-kΩ resistor.
Problem # 2
The op amp circuit in Fig.2 is a
current amplifier. Find the current
gain io/is of the amplifier.
Problem # 3
A voltage-to-current converter is
shown in Fig. 3, which means that
iL = Avi if R1R2 = R3R4. Find the
constant term A
Problem # 4
Design an op amp circuit such that
vo = - 2v1 + 4v2 - 5v3 - v4
Let all the resistors be in the range of 5 to 100 kΩ.
Figure 1
Figure 2
Figure 3
Problem # 5
Calculate io in the op amp circuit
of Fig. 4
Problem # 6
Refer to the bridge amplifier
shown in Fig. 5. Determine the
voltage gain vo/vi .
Problem # 7
For the circuit in Fig 6 , find vo.
Figure 4
Figure 5
Figure 6
Problem # 8
The circuit in Fig.7 is a
differential amplifier driven by a
bridge. Find vo.
Problem # 9
Figure 8 shows an
instrumentation amplifier driven
by a bridge. Obtain the gain vo/vi
of the amplifier.
Figure 7
Figure 8
All the best,
Dr. Yasser Hegazy
.