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note:
Analoge signalen kunnen alle waarden bevatten, digitale signalen kunnen enkel aan of uit zijn. Veel gebruikte aan uit spanningen zijn: 5V, 3V3, 1,8V


Inleiding


Analoog

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Bron:
https://www.researchgate.net/figure/The-analog-computer-DIANA-is-built-as-a-tool-to-solve-differential-equations-for-control_fig6_41719936


Digitaal

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Voordelen

  • Herprogrameerbaar
  • Sneller
  • Fout correctie
  • Signaal reconstructie

Reconstructie

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Booleaanse algebra


Verschillende poorten

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Wanneer brandt de lamp


Wanneer brandt de lamp?

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Niet / Not

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A=X
AX0110

note:
inverteerd het inkomende signaal


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OF / OR

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OF / OR

A+B=X
ABX000011101111

note:
Hoog als minstens één van de ingangen hoog is.


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NOF / NOR

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NOF / NOR

A+B=X
ABX001010100110

note:
Hoog als minstens één van de ingangen hoog is.


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EN / AND

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EN / AND

A.B=X
ABX000010100111

note:
Hoog als alle ingangen hoog zijn.


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NEN / NAND


NEN / NAND

A.B=X
ABX001011101110

note:
Hoog als minstens één van de ingangen hoog is.



XOF / XOR


XOF / XOR

AB=X
ABX000011101110

note:
Hoog als exact één van de ingangen hoog is.



XNOF / XNOR


XNOF / XNOR

AB=X
AB=X

ABX001010100111
note:
Hoog als alle ingangen de zelfde waarde hebben.


Volgorde van bewerkingen:

  1. Niet / Not /
    X
  2. En / AND /
    .
  3. Of / Or /
    +

Reken regels


Oefeningen


filmpje van vergelijking naar logischepoorten


Oef 1:

Stel de waarheidstabel op voor de volgende vergelijking:

A.B=X


Oef 1: oplossing

ABinvullenX000.00010.11101.00111.10


Oef 2:

Stel de waarheidstabel op voor de volgende vergelijkingen:

  1. (A.B)+C=X
  2. (A+B).C=X
  3. (A.C).B+(B.D).A=X


Logische vergelijking opstellen uit waarheidstabel.

BAXvgl001B.A011B.A100B.A111B.A

note: Neem de vergelijkingen (vgl) samen (of / or) van alle gevallen waar een 1 staat


BAXvgl001B.A011B.A100B.A111B.A

X=B.A+B.A+B.A Vereenvoudigen?


Vereenvoudigen manier 1:

X=B.A+B.A+B.A

X=B.(A+A)+B.A

X=B+B.A

X=B+A


Vereenvoudigen manier 2: karnaugh diagram

  • Schematische voorstelling waarheidstabel
  • Makkelijk af te lezen
  • Kan de vergelijking hard vereenvoudigen

Karnaugh kaart: regels

  • Nummering tabel mag mag 1 digit verschillen per stap
    • juist: 00 01 11 10
    • fout: 00 01 10 11

extra bron regels


Enkel 1 samen nemen

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Enkel horizontaal of verticaal

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enkel groepen van de groote
2n

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Groep moet zo groot mogelijk zijn

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Elke 1 moet minstens in één groep zijn

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Groepen mogen overlappen

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Groepen gaan over de grenzen

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Er moeten zo weinig mogelijk groepen zijn

zolang dit voldoet aan de vorige regels

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Vereenvoudigen manier 2:



Oefeningen Karnaugh


Oef

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Oef:

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Image Not Showing Possible Reasons
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extra oefeningen karnaugh
https://www.allaboutcircuits.com/worksheets/karnaugh-mapping/


Digitale schakelingen


Multiplexer


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Logische vergelijken oplossen met een multiplexer


Demultiplexer


Adders


Half-adder




Full adder





Parallelle-adder


Memory

latching relay


Flip flop


SR flipflop

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Latch SR flipflop

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Latch D flipflop

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Nieuwe component?


Né 555 timer

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Simulatie

Extra info:

Filmpjes reeks over alle onderwerpen

Goed overzicht van theorie

theorie van logische poorten tem adders

Als je even ontspanning nodig hebt tijdens digitale elektronica

Uitleg flipflops

Extra cursus digitaal