True

Assignment W2

· Logic Functions and Gates

Complete the questions below and submit your answers.

True/False

Indicate whether the statement is true or false.

1. (A AND B)’ is the same as A’ AND B’.

2. The output of an AND gate will be 1 only if all inputs are 1.

3. The output of an OR gate will be 1 only if all inputs are 1.

4. DeMorgan's Theorem shows us A & B = (A + B)’.

5. The output of an EXCLUSIVE-OR gate is 1 only when the inputs are different.

6. The output of a NAND gate is the same as the inverted output of an AND gate.

7. An active-low signal is considered ON when the value is LOW.

8. A DIP package has I/O pins around all 4 sides of the device.

9. The output of a NOR gate is LOW when any of the inputs are HIGH.

10. If both inputs are required to be ON for the output to be ON, the gate must be an AND gate.

11. DeMorgan's Theorem is (A+B)’ = A’ & B’.

12. DeMorgan's Theorem is (A & B)’ = A’ & B’.

13. TTL logic chips must have connections to Vcc and ground, even if all inputs and outputs are properly used and tied to valid signals.

14. If we use an AND gate to inhibit a signal from passing, one of the inputs must be ________. a. LOW b. HIGH c. INVERTED d. none of the above

15. A Circuit element that indicates wether an output signal is HIGH or LOW is _______.

A. an LED B. a pull-up resistor

C. a SMT D. a Vcc or Ground