Electrical Engineering Questions and Answers February 13, 2020

The typical voltage gain A d of an LM 741 op-amp is 200.000 and the typical CMRR is 90dB. Use these values to calculate the common mode gain A cm of the 741 op-amp. What are the units of the gain in the datasheet?

What are the typical voltage gain A d of the I.M 324 op-amp and the typical CMRR? Use these values to calculate the common mode gain A cm , of the LM 324 op-amp.

Using the excitation system models of (4.46)- (4.49), construct a block diagram in the Laplace domain that shows the control system with inputs Vref and Vt and output Efd.

TE dEfd dt dRf dt TF dVR dt (KESE(Efd)) Efd VR KF TF Rf Efd KAKE Ejd TF VR KARI KA(VrefVt) Vmin VR Vax R (4.46) (4.47) (4.48) (4.49)

Use mesh method to find all the branch currents in phasor form and write the time domain of the branch currents. Please note the direction of the three branch currents (i,(t), i (t), and i(t)). 1H i iz i(t) 24 sin(4t) A (1 H. (1) 24 cos(4t) A 14 114