EECS 40, Midterm 2, Spring 2000: Circuits, Transients, Op-Amps, Semiconductors, Exams of Microelectronic Circuits

Download EECS 40, Midterm 2, Spring 2000: Circuits, Transients, Op-Amps, Semiconductors and more Exams Microelectronic Circuits in PDF only on Docsity! EECS 40, Spring 2000 Midterm 2 Professor King Problem #1: Circuits with Dependent Sources [20 points] a) Find V0. [4 pts] b) In the circuit below, the independent source values and resistances are known. Use the nodal analysis technique to write 3 equations sufficient to solve for Va, Vb, and Vc. To receive credit, you must write your answer in the box below. [6 pts] DO NOT SOLVE THE EQUATIONS! Write the nodal equations here: 1. 2. 3. c) Consider the following circuit: EECS 40, Midterm #2, Spring 2000 EECS 40, Spring 2000 Midterm 2 Professor King 1 i) Find the voltage Vab. [5 pts] ii) What is the current ia when the terminals a and b are shorted together? [3pts] iii) Draw the Thevenin Equivalent Circuit. [2pts] Problem #2: Transient Response [30 pts] a) In the circuit below, the switch has been in the closed position for a long time. i) Find the value of vR just after the switch opens (t = 0+). [3 pts] ii) How much energy is dissipated in the 1 k-ohm resistor after the switch is opened? [2 pts] b) In the circuit below, the 5 micro-farad capacitor is initially charged to 5 V (vC1(0-) = 5 V). The switch is then closed at time t = 0. What is the final value of vC1? [5 pts] c) The following is a circuit model for an NMOS inverter, in which the transistor is turned on at time t = 0: EECS 40, Midterm #2, Spring 2000 Problem #1: Circuits with Dependent Sources [20 points] 2