Digital Circuits

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Digital Circuits

Transcript of Digital Circuits

  • (-482) 1

    C. C. Katsidis (ETY-482)

    A. .

    0 , VL ,

    1 , VH.

    , 0

    , VH , 1 , VL.

    (OR)

    A B Y 0 0 0 0 1 1 1 0 1 1 1 1

    (OR)

    (OR) A B Y

    VH VH VH VH VL VL VL VH VL VL VL VL

    (AND) A B Y 0 0 0 0 1 0 1 0 0 1 1 1

    A B Y VL VL VL VL VH VH VH VL VH VH VH VH

  • (-482) 2

    C. C. Katsidis (ETY-482)

    (AND)

    (AND) A B Y

    VH VH VH VH VL VH VL VH VH VL VL VL

    (OR) A B Y 0 0 0 0 1 1 1 0 1 1 1 0

    (OR)

    (OR) A B Y

    VH VH VH VH VL VL VL VH VL VL VL VH

    OXI (NOT)

    A Y 0 1 1 0

    A B Y VL VL VL VL VH VL VH VL VL VH VH VH

    A B Y VL VL VL VL VH VH VH VL VH VH VH VL

  • (-482) 3

    C. C. Katsidis (ETY-482)

    OXI (NOT)

    A Y VL VH VH VL

    OXI (NOT)

    A Y VH VL VL VH

    (OR)

    A B C Y 0 0 0 0 0 0 1 1 0 1 0 1 0 1 1 1 1 0 0 1 1 0 1 1 1 1 0 1 1 1 1 1

    OXI (NOR)

    A B C Y 0 0 0 1 0 0 1 0 0 1 0 0 0 1 1 0 1 0 0 0 1 0 1 0 1 1 0 0 1 1 1 0

  • (-482) 4

    C. C. Katsidis (ETY-482)

    KAI (AND)

    A B C Y 0 0 0 0 0 0 1 0 0 1 0 0 0 1 1 0 1 0 0 0 1 0 1 0 1 1 0 0 1 1 1 1

    OXI KAI (NAND)

    A B C Y 0 0 0 1 0 0 1 1 0 1 0 1 0 1 1 1 1 0 0 1 1 0 1 1 1 1 0 1 1 1 1 0

    . , DL (Diode-

    Logic configuration) .

    1. OR .

  • (-482) 5

    C. C. Katsidis (ETY-482)

    OR, "1"

    "1".

    , "0"

    "0".

    1

    "1" ( VL)

    ,

    ( "1").

    ( )

    "1" :

    ( )R A KR on R

    i f

    V V VV I R V RR r R

    +

    = = + + (1)

    VK (0.2V

    0.6V ) , rf,

    .

    i fR R r+ , :

    ('1')A K K L KV V V V V V + = + = + (2)

    "0"

    ( V) VR=VH,

    = VR=VH,

    "0".

  • (-482) 6

    C. C. Katsidis (ETY-482)

    2. OR .

    2 OR .

    VR

    "0"

    , VL.

    VH,

    "1", , ,

    ( "1") .

    VH

    Ri

    .

    low, "0",

    Y VR,

    low, "0".

  • (-482) 7

    C. C. Katsidis (ETY-482)

    3. AND .

    H AND 3

    OR

    2.

    AND "1"

    "1".

    "0".

    , "1" ( , VL,

    )

    VR=VL, ( "1"). ,

    "0", VH,

    ,

    ( "0") VH-VK.

  • (-482) 8

    C. C. Katsidis (ETY-482)

    4. AND .

    , AND

    4 OR

    1.

    "1" ,

    VH

    VR (=VH) "1". ,

    (

    "0" ),

    VH+VK.

    . NOT .

    5, npn

  • (-482) 9

    C. C. Katsidis (ETY-482)

    VBB= 12V, VH

    "1".

    5. , NOT.

    "0"

    VL (=0Volt),

    .

    2

    1 2

    ( )B BBR V

    R R =

    + (3)

    ,

    VCC ( "1")

    .

    "1"

    V (=12Volt),

    .

    =CE(SAT) 0.2Volt ( "0").

  • (-482) 10

    C. C. Katsidis (ETY-482)

    :

    ( )( )

    0.2CC CE SAT CCC SAT

    C C

    V VIR R

    = (4)

    R1 R2 :

    ( )1

    1 1

    0.8A BE SAT HV VIR R

    = (5)

    ( )2

    2 2

    ( ) 0.8BE SAT BB BBV VIR R

    += (6)

    :

    ( )1 2

    C SATB

    II I I

    = = (7)

    R1=15K, R2=100K, RC=2.2K, -VBB=-12V, VCC=12V.

    . DTL, TTL & RTL.

    DTL

    6 NAND DTL.

    AND

    4 5.

    R1,

    .

  • (-482) 11

    C. C. Katsidis (ETY-482)

    6. NAND DTL.

    .

    7. NAND DTL

  • (-482) 12

    C. C. Katsidis (ETY-482)

    6,

    , 7

    D1 D2.

    R2

    .

    : RD=5K, RC=2.2K, R2=5K VCC=VH=5V.

    NAND (

    AND),

    ( "0")

    ( "1"). ,

    ( "1") ( "0").

    ,

    ( "0")

    ( VL

    ).

    , , (VL+VD). VD

    . ,

    D1 D2

    Q =0

    VY=VCC=VH,

    ( "1").

    ( "1")

    VCC.

    D1 D2

    , , .

  • (-482) 13

    C. C. Katsidis (ETY-482)

    Q

    , CE(SAT),

    "0".

    .

    ,

    7 :

    ( "1") D1 D2

    ( "0").

    :

    1 2 ( ) 0.7 0.7 0.8 2.2D D BE SATV V V V Volt = + + = + + = (8)

    ( ) 0.8BE SATV Volt= (9) Q

    .

    1 :

    12.2CC CC

    D D

    V V VIR R

    = = (10)

    2 :

    ( )2

    2 2

    0.8BE SATVIR R

    = (11)

    :

    1 22

    2.2 0.8CCB

    D

    VI I IR R

    = = (12)

  • (-482) 14

    C. C. Katsidis (ETY-482)

    :

    ( ) 0.2CC CE SAT CCC

    C C

    V V VIR R

    = = (13)

    12 13

    :

    min2

    0.2 2.2 0.8C CC CCC DB

    I V VR R RI

    = = (14)

    D1 D2 .

    D1 D2 Q

    .

    :

    0.2 0.7 0.9L DV V Volt = + = + = (15) (

    D1 D2 )

    :

    0.9 0.6 0.3BEV V V Volt = = = (16) VK(=0.6Volt) (:

    0.7Volt ).

    VK (=VBE) = 0.5 Volt

    0.3Volt

    D1 D2. 0.2 Volt

    0.5 Volt

  • (-482) 15

    C. C. Katsidis (ETY-482)

    :

    0.9 0.6 0.6 0.3BEV V V V Volt = = = (17)

    ()

    ()

    8. ) NAND DTL

    D1 7

    . )

    .

  • (-482) 16

    C. C. Katsidis (ETY-482)

    VBE

    0.2 0.8 Volt.

    .

    8 DTL NAND

    Q2

    (IC2).

    : RD1=1.75K, RD2=2K, RC2=2.2K, R2=5K, VCC=5V.

    NAND

    .

    8,

    Q2 NAND ()

    NAND

    .

    13

    NAND

    (IC=IC(0)). NAND

    NAND

    NAND

    NAND

    Q2 ( NAND)

    ( 8)

    Q2 ..

    ,

    Q2

    . :

  • (-482) 17

    C. C. Katsidis (ETY-482)

    ( ) (0)C N CI I NI= + (18)

    :

    1 2 1 2 1 2

    0.7 0.9CC D Y CC L CCD D D D D D

    V V V V V VIR R R R R R

    = = =+ + + (19)

    Q2

    ,

    NAND :

    ( ) (0) 2C N C BI I NI I= + =

    21 2

    0.2 0.9CC CCB

    C D D

    V VN IR R R

    + =+ (20)

    Q2 D1

    Q1.

    , Q1

    . :

    1( ) 2 2( ) 0.7 0.7 0.8 2.2BE ACT D BE SATV V V V Volt = + + = + + = . (21)

    1 2 :

    1 1 1C BI I I= + , 2 2( ) 2 2/ 0.8 /BE SATI V R R= (22) Q2:

    2 1 2 1 1 20.8 /B C BI I I I I R= = + (23)

  • (-482) 18

    C. C. Katsidis (ETY-482)

    , Q1 D1

    Q2

    .

    HT-DTL NAND.

    9. NAND HT-DTL (High Threshold

    DTL) Zener

    .

    ,

    8

    D2 Zener.

    .

    RD1=3K, RD2=12K, RC2=15K, VZ=6.9V,R2=5K.

  • (-482) 19

    C. C. Katsidis (ETY-482)

    TTL NAND.

    10. TTL NAND

    TTL NAND 10,

    DTL-NAND 7.

    : RB1=4K, RC2=1.4K, RC3=4K,

    R2=1K.

    DTL-NAND 7

    (Transistor-Transistor Logic

    - TTL).

    D2 ( 7) -

    Q2. D1 pn

    - Q1 .

    A, B, C

    pn - Q1.

  • (-482) 20

    C. C. Katsidis (ETY-482)

    TTL NAND.

    (

    "0") :

    1 0.2 0.7 0.9L BEV V V Volt = + + = (24)

    - Q1 Q2

    Q3 V =

    0.7+0.7+0.7=2.1Volt. Q2 Q3

    ,

    "1" ( VH=VCC=5Volt).

    Q1 (

    -) ( -

    ) .

    ,

    - Q1 . V

    VCC Q2 Q3 .

    , VY = VCE3(SAT) = 0.2V = VL ( "0").

    .

    Q2 -

    -

    Q2 Q3

    .

    ,

    Q2 Q3

    .

    Q1 :

  • (-482) 21

    C. C. Katsidis (ETY-482)

    1 2( ) 3( ) 0.8 0.8 1.6C BE SAT BE SATV V V Volt= + + = (25)

    "1" "0" , VL0.2Volt

    24 Q1 V1= V

    =0.9Volt VBC1=VB1-VC1=0.9-1.6=-0.7 . ,

    (p-) (n-)

    . ,

    .

    TTL NAND TOTEM.

    11. TTL NAND

    TOTEM.

  • (-482) 22

    C. C. Katsidis (ETY-482)

    , Q1 ,

    RB1 VCC AND.

    .

    : RB1=4K, RC2=1.6K, RC3=130,

    R2=1K.

    Q3 Q4 Totem (

    npn npn )

    TTL. Totem

    Q3 Q4 Q3 Q4.

    Q3 Q4

    . ( ) Q4

    Q3 .

    & ,

    VL, Q1

    Q1 VB1=VL+0.7Volt.

    , Q2

    Q1 Q2

    , Q3

    (

    1.5V ):

    3 3 1Y B BE DV V V V= (26) ( "1")

    . Q2

    Q4

    Q3 .

  • (-482) 23

    C. C. Katsidis (ETY-482)

    ( "0"). D1

    Q3 Q4

    - Q3. Q2 Q4

    :

    3 4( ) 2( ) 1B BE SAT CE SATV V V Volt= + (27)

    3 4( ) 1 0.9E CE SAT DV V V Volt= + (28) Q3 .

    TTL NOR.

    12. TTL NOR

    TOTEM.

  • (-482) 24

    C. C. Katsidis (ETY-482)

    TTL NOR TTL

    NAND ( Q5 Q6).

    : RB1=4, RB5=4K, RC2=1.6K,

    RC3=130, R2=1K.

    Q2 Q6

    OR.

    ,

    NOR.

    , VL,

    Q1 Q5

    VL+0.7 Volt Q2 Q6.

    Q3

    .

    ( )

    (Q1 Q5)

    Q2 Q6 .

    Q2 Q6

    Q4

    .

  • (-482) 25

    C. C. Katsidis (ETY-482)

    RTL NOR

    13. NOR RTL

    : RC=600,

    RB=400, VCC=3.6V.

    ( "0"),

    VCC ( "1").

    ,

    CE(SAT) .

    RTL (Resistor Transistor Logic)

    wafer

    .

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    /Description >>> setdistillerparams> setpagedevice