7segment 구현

소개

디지털공학 시간에 했던 logicaid,simuaid를 이용한 7세그먼트 설계
이자료로 에이쁠 받았습니다.

목차

(1) Derive a truth table for the problem. 7세그먼트 진리표

(2) Use Karnaugh maps to derive logic equations in sum-of-products or product-of-sums form depending on whether NAND gates or NOR gates are required. 카노맵구현

(3) Enter the truth table into LogicAid, derive the logic equations, and check the answers against the results of step (2). 회로 식 유도

(4) Draw a circuit of AND and OR gates, trying to minimize the number of gates required by using common gates where appropriate. Factoring or multiplying out is required in some cases. 회로도 구현

(5) Convert to NAND or NOR gates as specified. nand ,nor 로 구현한 회로도

본문내용

Several of the problems involve the design of a circuit to derive a seven-segment indicator, as shown in the following figure. The seven-segment indicator can be used to display any one of the decimal digits 0 through 9. For example, "1" is displayed by lighting segments 2 and 3, "2" by lighting segments 1, 2, 7, 5 and 4, and "8" by lighting all seven segments. A segment is lighted when a logic is applied to the corresponding input on the display module.

Design a circuit which multiplies two 2-bit binary numbers and displays the answer in decimal on a seven-segment indicator. In figure 8-24, A and B are teo bits of binary number N1, and C and D are two bits og a binary number N2. The product (N1 * N2) is to be displayed in decimal but lighting appropriate segments of the seven-segment indicator. For example, if A = 1, B = 0, C = 1, and D = 0, the number "4" is displayed by lighting segments 2, 3, 6, and 7.

Design your circuit using only 2-, 3-, and 4-input NAND gates and inverters. Try to minimize the number of gates required. The variables A, B, C, and D will be available from toggle switches. Any solution that uses 18 or fewer gates and inverters ( not counting the four inverters for the inputs) is acceptable. Note: You will get extra points if you use fewer than 18 gates and inverters.

참고자료

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