ECE 414 Quiz 2 9/16/15 Honor Code in effect: Open book and notes Print your name here and on the back: Show all work in the allotted space for each problem and circle each answer. No other material will be accepted R5 (2) If the output of the current source is zero, what is its resulting equivalent circuit? a) U3 1K C1 R6 LM339 1K b) (2) Under this condition, what is the voltage at the R4 10K R7 inverting input of U1? R1 99K c) (2) What is the cutoff frequency of the high-pass filter? d) (2) Assuming that the output of U3 is high, what voltage is 1k V1 U1 R2 1K LM741 10V required at the inverting input to cause the output to go low (as the input voltage increases)? R3 U2 1K LM741 e) (2) Name two considerations involved in selecting a tran 0 10000us 0 500ns suitable value (large or small) for the pull-up resistor R5