1 / 69

Ch 4. Combinational Logic Design Principles

Ch 4. Combinational Logic Design Principles. Combinational Logic Circuit Outputs depend only on its current inputs No feedback loop. Sequential Logic Circuit Outputs depend on its current inputs and present states F eedback loop. 4.1 Switching Algebra. ‘+’ : ‘OR’. ‘ ’ : ‘AND’.

locke
Télécharger la présentation

Ch 4. Combinational Logic Design Principles

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Ch4. Combinational Logic Design Principles • Combinational Logic Circuit • Outputs depend only on its current inputs • No feedback loop • Sequential Logic Circuit • Outputs depend on its current inputs and present states • Feedback loop

  2. 4.1 Switching Algebra

  3. ‘+’ : ‘OR’ ‘’ : ‘AND’

  4. Switching-algebra theorems are obvious (by perfect induction) & is identical to the distributive law for integers and reals

  5. DeMorgan’s Th. NAND

  6. DeMorgan’s Th. NOR

  7. Black box Representation with Truth table Active Low

  8. Black box Representation with Truth table Active Low

  9. Function with 3 input X, Y, Z

  10. DeMorgan’s Th.

  11. 4.2 Combinational-Circuit Analysis

  12. F(X, Y, Z)

  13. F(X, Y, Z)

  14. Three-level without considering inverter

  15. “Add-out” to obtain a product of sums by T8’ T8’ Same (Figure 4-12) Sum of products (Figure 4-13) Product of sums

  16. 4.3 Combinational-Circuit Synthesis Prime number detector

  17. NAND NOR

More Related