Exam 4: Combinational Logic Circuits

The implementation of simplified sum- of- products expressions may be easily implemented into actual logic circuits using all______with little or no increase in circuit complexity.

GSI integrated circuits contain:

_______ circuits contain 100 to 9,999 gates per chip.

In true sum- of- products expressions an inversion bar cannot cover more than single variables in a term.

_______ circuits contain 1,000,000 gates per chip.

Which of the following Boolean expressions is in sum- of- products form

The output of an OR gate is connected directly to the input of an AND gate. The other AND gate input is a constant "Enable" HIGH. A technician checks the inputs to the OR gate and notes a HIGH and LOW. The output of the OR gate is noted as being a HIGH. The "Enable" HIGH input to the AND gate is verified as normal. The technician checks the OR gate input to the AND gate and observes a LOW or no voltage condition. Of the probable causes listed, select the one that most likely is the problem. Assume CMOS gates.

Which of the following is NOT a step in the development cycle for a PLD?

The input file for low- level development systems normally contains:

The _______ circuit produces a HIGH output whenever the two inputs are equal.

A CMOS series that is NOT pin compatible but is electrically compatible with TTL is:

Exclusive gates can have any number of inputs.

Single looping in groups of three is an allowable K- map simplification technique.

The input combination of A = 1, B = 0, C = 0, and D = 1 would be represented on a Karnaugh map by the square labeled:

One characteristic of a sum- of- products expression is that it can be implemented using all _______ gates without much alteration.

A good rule of thumb for determining the pin numbers of dual- in- line package IC chips would be to place the notch to your right and pin 1 will always be in the lower right corner.

A _______ expression consists of two or more AND terms that are ORed together.

A 3-input (A, B, and C) logic circuit has a HIGH output only when A=1, B=1, and C=1 or when A=0, B=1, and C=1. Which of the following sum-of-products expressions describes this function?

-Which of the following sum- of- products expressions accurately describes K- map 4- 1?

A truth table is the basis for logic circuit design because the designer can assign outputs for particular input combinations and then determine the simplest circuitry required to implement the function.