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Logic Circuit Class/Exam2006_2

2006๋…„ 2ํ•™๊ธฐ ๊ธฐ๋ง๊ณ ์‚ฌ

  • ๋ถ€๋ถ„ ์ ์ˆ˜ ์—†์Œ.
1. ์—ฐ์Šต๋ฌธ์ œ 5-18 ๊ณผ ๋˜‘๊ฐ™์Œ.
2. ๋‹ค์Œ๊ณผ ๊ฐ™์ด ๋”œ๋ ˆ์ด๋ฅผ ๊ฐ–๋Š” ํšŒ๋กœ์—์„œ ์ดˆ๊ธฐ์—๋Š” x ๊ฐ€ 1์ด๋‹ค. 0์ดˆ์ผ ๋•Œ x ๊ฐ€ 0์œผ๋กœ, 2์ดˆ์ผ ๋•Œ x ๊ฐ€ 1๋กœ ๋ณ€ํ•œ๋‹ค๊ณ  ํ•  ๊ฒฝ์šฐ x,y ์˜ vector waveform ์„ ๊ทธ๋ฆฌ์‹œ์˜ค.
ํฌ๋งท๋ณ€ํ™˜_jb.jpg

3. ๊ฐ•์˜๋ก์— ๋‚˜์˜จ ์ปคํ”ผ ์žํŒ๊ธฐ ๋ฌธ์ œ. ์ปคํ”ผ๊ฐ’์€ 1dime, ๋™์ „์€ dime, nickel ๋งŒ ๋ฐ›๋Š” ์žํŒ๊ธฐ. ๊ฑฐ์Šค๋ฆ„๋ˆ์€ ์ปคํ”ผ๊ฐ€ ๋‚˜์˜ฌ ๋•Œ๋งŒ ๋‚˜์˜ด. X1 ์ด dime ์ž…๋ ฅ, X2 ๊ฐ€ nickel ์ž…๋ ฅ, Y ๊ฐ€ ์ปคํ”ผ์ถœ๋ ฅ, Z ๊ฐ€ ๊ฑฐ์Šค๋ฆ„๋ˆ ์ถœ๋ ฅ์ธ ํšŒ๋กœ ์„ค๊ณ„ํ•˜์‹œ์˜ค. ์ƒํƒœ๋Š” 0 ์ผ๋•Œ๊ฐ€ ์žํŒ๊ธฐ ์ดˆ๊ธฐ ์ƒํƒœ์ด๊ณ  1์ผ ๋•Œ๊ฐ€ 5์„ผํŠธ๋ฅผ ๊ฐ–๊ณ  ์žˆ๋Š” ์ƒํƒœ.
  1. D ํ”Œ๋ฆฌํ”Œ๋กญ์œผ๋กœ ์„ค๊ณ„ํ•˜์‹œ์˜ค.
    b. JK ํ”Œ๋ฆฌํ”Œ๋กญ์œผ๋กœ ์„ค๊ณ„ํ•˜์‹œ์˜ค.
4. ์ปดํ“จํ„ฐ ํ†ต์‹ ์—์„œ NRZI ๋ฌธ์ œ. USB ๊ฐ€ NRZI ๋ฐฉ์‹์„ ์“ด๋‹ค. ๋‹ค์Œ๊ณผ ๊ฐ™์ด NRZI ๋ฅผ ๋งŒ๋“ ๋‹ค.
๋ฉ”์„ธ์ง€๊ฐ€ 0 ์ด๋ฉด NRZI ๊ฐ€ invert ๋˜๊ณ  ๋ฉ”์„ธ์ง€๊ฐ€ 1์ด๋ฉด NRZI ๊ฐ€ ์œ ์ง€๋œ๋‹ค.
์˜ˆ)
๋ฉ”์„ธ์ง€ 000100111101000
NRZI 1010010000011010
  1. Find the state diagram by Mealy machine.
    b. Find the state table.
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