Introduction to Electrical Engineering - Howework 6
1. Derive the truth table for the circuit shown below. The outputs are F1 and F2 and the inputs areA,B and C.
A B
C
F1
F2
2. A majority function is generated in a combi- national circuit when the output is equal to 1 if the input variables have more 1’s than 0’s.
The output is 0 otherwise. Design a 3-input majority function usingAN D,ORandN OT gates.
3. Design a circuit with 3 inputs and 1 output using onlyN AN D gates. The output should be 1 if the value of the binary input is less than 3. The output is logic 0 otherwise.
4. A half subtractor is a circuit that finds the difference between two 1-bit numbers. Derive the truth table for it and write the logical ex- pressions for the difference and borrow out- put.
5. For five clock cycles, the inputs J and K in an edge triggered J-K flipflop are 10111 and 00101. What is the output?
6. Analyze the following circuit and derive the truth table.
D Q
Clk X
7. How many address lines are required for a 16K×8 RAM?