Lab 10 Sequential Circuit Design For this lab, you will not write a lab report! Instead, each student must fill in the t

[answerhappygod]

Lab 10 Sequential Circuit Design For This Lab You Will Not Write A Lab Report Instead Each Student Must Fill In The T 1 (52.76 KiB) Viewed 21 times

Lab 10 Sequential Circuit Design For This Lab You Will Not Write A Lab Report Instead Each Student Must Fill In The T 2 (38.29 KiB) Viewed 21 times

Lab 10 Sequential Circuit Design For This Lab You Will Not Write A Lab Report Instead Each Student Must Fill In The T 3 (15.55 KiB) Viewed 21 times

Lab 10 Sequential Circuit Design For this lab, you will not write a lab report! Instead, each student must fill in the tables, draw the diagrams, and answer the verbal questions on this worksheet, which they will hand in when they have completed the lab ICs needed: 7474 (D-FF), 3x 7476(JK-FF), 74195 (shift register) 7486(XOR), 7404 (inverter), 2x 7408 (AND), 7432 (OR) For each experiment, when the circuit is working, have the lab instructor check it. Introduction: In this experiment, you will design, construct, and test three synchronous sequential circuits. Use flip-flop devices (J-K FF, D-FF, T-FF) and logic gates. The following is the general procedure for sequential circuit design: 1. Analyze requirements to obtain a state diagram. If possible, simplify the states. 2. Derive the state table from the state diagram. a. Determine the number of flip-flops and give a name to each FF b. Obtain state tables and output tables 3. Select the type of flip-flops and derive the input equation for each FF using excitation tables 4. Obtain simplified input and output equations (for external outputs) 5. Draw the circuit diagram. 6. Construct the circuit. 7. Test and debug the circuit Experiments: 1. Design and construct the following circuit: This circuit has two inputs and two states. When the two inputs are the same, the state won't change; while the two inputs are different, the state will switch. Step 1: By analyzing the requirements, the following state diagram is derived: 01.10 0,11 00, 11 01.10 c) State dinam Step 2: a) From the given state diagram, two states require one flip-flop Why?
X b) Name the flip-flop as A, name the two inputs as x and y. Based on the state diagram, fill in the 'Next State' column in the state table: Present State Inputs Next State A Input of D-FF DA A 0 0 0 0 1 1 1 1 х 0 0 1 1 0 0 1 1 Y 0 1 0 1 0 1 0 1 Step 3: a) Select the flip-flop type: since it is the simplest for this application, choose the D-FF. b) Considering the "Next State" column, figure out what input must be applied to the D-FF for each state, and fill in the values for the appropriate column in the table above. Note that no output is defined for this circuit, so there are no output columns in the state table and no output equations to derive. Step 4: Obtain the input equation for Da, using a K-map. Three values contribute to the equation (present state A and inputs x and y), so it is a 3 variable K-map. Fill in the K-map and derive the Boolean expression for Dx (Hint: use XOR). For DA А 00 01 11 10 0 А { 1 Write the Boolean for Da expression below: DA- Step 5. Draw the circuit diagram: A D 2
Step 6. Use 7474 IC chip to construct your circuit. Mark the pin #s on your circuit diagram above. Use logic switches S1 & S2 for inputs x & y, and use the TTL output from the function generator as the clock (set frequency - 1 Hz). Use an indicator to show the circuit state A. Check your circuit with instructor