Arithmetic Circuit Test – 1

1. A digital system consists of _____ types of circuits.

2. All logic operations can be obtained by means of __________

3. In a sequential circuit, the output at any time depends only on the input values at that time.

4. If the two numbers include a sign bit in the highest order position, the bit conditions of interest are the sign of the result, a zero indication and __________

5. In a combinational circuit, the output at any time depends only on the _______ at that time.

6. The flag bits in an ALU is defined as ___________

7. The design of an ALU is based on __________

8. If the two numbers are unsigned, the bit conditions of interest are the ______ carry and a possible _____ result.

9. The basic building blocks of the arithmetic unit in digital computers are __________

10. Procedure for the design of combinational circuits are:

A. From the word description of the problem, identify the inputs and outputs and draw a block diagram.
B. Draw the truth table such that it completely describes the operation of the circuit for different 
combinations of inputs.
C. Simplify the switching expression(s) for the output(s).
D. Implement the simplified expression using logic gates.
E. Write down the switching expression(s) for the output(s).