Laboratory Report Cover Sheet;DeVry University;College of Engineering and Information Sciences;Course Number: ECET-230;Professor;Laboratory Number: 4;Laboratory Title: Introduction to Flip-Flops;Submittal Date: Click here to enter a date.;Objectives;? To simulate the operation of a circuit used to create an edge-triggered D flip-flop.;? To test the operation of a 74LS74 D flip-flop;? To test the operation of a 74LS112 J-K flip-flop;Program;? To simulate the operation of a circuit used to create an edge-triggered D flip-flop.;Questions;1. Why is the condition when both and are LOW considered illegal?;1. How does the value you measured for t setup compare with value specified in the 74LS74 data sheet? You may need to go on-line to find this value.;Why were the LEDs removed before making the propagation delay measurements;Modify the VHDL Architecture for the 74LS112 J-K flip-flop so that the preset (PRE) is synchronous instead of asynchronous. The clear (CLR) remains asynchronous.