Given the input for a negative level clocked D Flip-flop, draw the output timing diagram and answer the following questions. Assume that initially, the value of output is 0 (zero). Write: A - if the output is a high logic level B - if the output is a low logic level C - if there is an indeterminate output CLK A 3 с D- if the output transitions from 0 to 1 E - if the output transitions from 1 to 0 1. What is the value of the output at point A? 2. What is the value of the output at point B? 3. What is the value of the output at point C? 4. What is the value of the output at point D? 5. What is the value of the output at point E? 6. What is the value of the output at point F? D n E F

2. Design a logic circuit with two inputs and 4 outputs, with each of the outputs hooked up to an LED. Only the first LED should light up when the input values are 00. Only the next LED should light up with the input values are 01. Only the following LED should light up for 10, and only the last LED should light up for input 11. Thus for each input combination, you should have one LED only being lit. This is called a DECODER circuit, you are decoding 2 bit binary input to one of 4 discrete outputs. a. Create the truth table (use the standard truth table format). b. Write a Boolean expression that corresponds to the truth table.

Design a modulo-6 counter, which counts in the sequence 0, 1, 2, 3, 4, 5, 0, 1, .... The counter counts the clock pulses if its enable input, w, is equal to 1. Use D flip-flops in your circuit. Repeat Problem 6.23 using JK flip-flops. Repeat Problem 6.23 using T flip-flops.

A combination of inverters is shown in Figure 3–77. If a HIGH is applied to point A, determine the logic levels at points B through F. B D A E F

Q1/ Estimate the Truth Table of the logic circuit shown below and use it to draw the timing diagram of the output signal X and Y in proper relation to the inputs A :: Y се

Q1: Can you answer this question with clearly showing your work

Design an asynchronous sequential logic circuit which has inputs (X1 and X2) and one output (Z) the output (z) must go to (1) when at the end of the input sequence (00,10), This output must be maintained (unchanged) for all inputs change until the sequence (11,10) occurs, then the output must go to zero (0). and The output flips when the input is (01,10)