ECE620_hw7sol

ECE620_hw7sol - ECE 620 Dr. R. ROOSTA H.W # 7 SOLUTIONS P1)...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
ECE 620 Dr. R. ROOSTA H.W # 7 SOLUTIONS P1) f = wxy + (w + z)(w' + y') = wxy + ww' + wy' + w'z + y'z The term ww' indicates that there is static 0 hazard. To find out about the static 1 hazard, let's make the karnaugh map: y,z w,x 00 01 11 10 00 1 1 01 1 1 11 1 1 1 1 10 1 1 As we can see, there are some adjacent 1's which are not in the same prime implicant, thus indicating static 1 hazard . P2) An essential hazard occurs in an asynchronous sequential circuit as a result of certain specified next state sequences. Sequences occur as a result of transitory states. Essential hazards are due to unequal signal delay paths in the circuit. To observe from a Karnaugh map if an essential hazard can occur, simply test the circuit by changing a single input variable one time (change the single input variable from 0 to 1 or 1 to 0), then change the same input variable 3 times consecutively (from 0 to 1 to 0 to 1 or from 1 to 0 to 1 to 0). If the circuti always ends up in the same state, then the essential hazard
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/27/2010 for the course ECE 620 taught by Professor Raminroosta during the Spring '10 term at CSU Northridge.

Page1 / 4

ECE620_hw7sol - ECE 620 Dr. R. ROOSTA H.W # 7 SOLUTIONS P1)...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online