Download Truth Table - Introduction to Microelectronic Circuits - Exam and more Exams Microelectronic Circuits in PDF only on Docsity! EECS 40 MIDTERM 1 (note letters following a _ means subscript, ex V_ab means the voltage from a to b) Problem 1: Logic Gates and Timing Diagrams [25 Points] Consider the following digital logic circuit: a) Fill out the truth table for the logic function G. [8 points] b) Write a simple logical expression for the function G. [5 points] c) How many unit gate delays are there between the inputs (A and B) and the output (G)? [2 points] (in other words, how many unit gate delays must you wait, after changing A and/or B, before you can trust the value of G to be valid?) d) Assume each logic gate has a unit delay T = 100ps. Draw the timing diagrams for t=0 to t=700ps, for the given logic input values A and B. [10 points] (in other words, draw the timing diagrams for C, D, E, F, and G) EECS40 MT1 1 Problem 2: Resistive circuits [30 points] a) Find the equivalent resistance R_ab for the following circuit. [6 points] b) Suppose you need a 6k ohm resister for your Tutebot project, but your TA gives you only a supply of 10k ohm resistors. Being a clever Cal student, how would you connect several 10k ohm resistors together, to achieve a 6k ohm resistance? [7 points] (draw the circuit diagram) c) Consider the following circuit: i) Find V_cd. [3 points] ii) Find the power developed/absorbed by the current source, P_I iii) Indicate in the table below (by checking the appropriate boxes) how various circuit parameters would change if the terminals c and d were to be shorted together. Justify your answers. [6 points] EECS40 MT1 2 b) Use the source transformation method to obtain the Norton Equivalent Circuit for the circuit in part (a). [5 points] source transformation--> EECS40 MT1 5 c) The Thevenin Equivalent Circuit for a certain linear circuit is given below. Plot the current (I) versus the output voltage (V) for the circuit, labelling the y-intercept and x-intercept. [5 points] d) The circuit in part (c) is connected to a 1k ohm load resistor (placed between the terminals a and b. Find the power absorbed in the load resistor, P_lk (this is what it says on the test, don't ask me). [5 points] Posted by HKN (Electrical Engineering and Computer Science Honor Society) University of California at Berkeley If you have any questions about these online exams please contact examfile@hkn.eecs.berkeley.edu. EECS40 MT1 Posted by HKN (Electrical Engineering and Computer Science Honor Society) University of California at Berkeley If you have any questions about these online exams please contact examfile@hkn.eecs.berkeley.edu.6
