Comprehensive Problems

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Comprehensive Problems

5.89 Design a circuit that provides a relationship between output voltage vo and input voltage vs such that v^o = 12v^s − 10. Two op amps, a 6-V battery, and several resistors are available.

5.90 The op amp circuit in Fig. 5.107 is a current amplifier. Find the current gain io∕is of the amplifier.

Figure 5.107

For Prob. 5.90.

5.91 A noninverting current amplifier is portrayed in Fig. 5.108. Calculate the gain io∕is. Take R¹ = 8 kΩ and R² = 1 kΩ.

5.92 Refer to the bridge amplifier shown in Fig. 5.109. Determine the voltage gain vo∕vi.

Figure 5.109

For Prob. 5.92.

5.93 A voltage-to-current converter is shown in Fig. 5.110, which means that iL= Avi if R1R2 = R3R4. Find the constant term A. *

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