Download - Lab 5 - Sol

Transcript
  • B mn K thut my tnh Khoa Khoa hc v K thut my tnh

    BI TN 06: MCH M BT NG B I. Mc ch bi th nghim

    - Thit k mch m bt ng b bng D flip flop. - Thit k mch m bt ng b bng JK flip flop.

    II. Ni dung chun b trc - Kho st hot ng ca IC 74LS73, 74LS74. - Quy trnh thit k b m bt ng b. - Phn l thuyt cc bi o s 1, 2, 3, 4, 5, 6.

    III. Bi o Bi o s 1: mch m bt ng b 2 bit

    Cho mch nh hnh v:

    B

    CLK

    2

    3

    5

    6

    41

    D

    CLK

    Q

    Q

    PR

    EC

    LR

    A

    VCC

    VCC

    12

    11

    9

    8

    1013

    D

    CLK

    Q

    Q

    PR

    EC

    LR

    Gi s ban u BA = 00, s chuyn trng thi ca mch (A l LSB):

    Sinh vin nhn xt mch trn lm nhim v:

    Rp mch, so snh kt qu thc nghim vi l thuyt. Gii thch v khc phc nguyn nhn dn ti s khc bit (nu c).

    Thay i mch trn, ly ng ra l Q nh hnh v:

    Hc k II/2014-2015 Trang 1 o Nguyn Quc Vinh - 1414674

    m t 3 v 0.

  • B mn K thut my tnh Khoa Khoa hc v K thut my tnh

    CLK

    VCC

    12

    11

    9

    8

    1013

    D

    CLK

    Q

    Q

    PR

    EC

    LR

    BA

    VCC

    2

    3

    5

    6

    41

    D

    CLK

    Q

    Q

    PR

    EC

    LR

    Gi s ban u BA = 00, s chuyn trng thi ca mch:

    Sinh vin nhn xt mch trn lm nhim v:

    Rp mch, so snh kt qu thc nghim vi l thuyt. Gii thch v khc phc nguyn nhn dn ti s khc bit (nu c).

    Thay i mch, ly chn Q kch tn hiu CLK nh hnh v:

    BVCC

    A

    12

    11

    9

    8

    1013

    D

    CLK

    Q

    Q

    PR

    EC

    LRCLK

    VCC

    2

    3

    5

    6

    41

    D

    CLK

    Q

    Q

    PR

    EC

    LR

    Gi s ban u BA = 00, s chuyn trng thi ca mch:

    Sinh vin nhn xt mch trn lm nhim v:

    Rp mch, so snh kt qu thc nghim vi l thuyt. Gii thch v khc phc nguyn nhn dn ti s khc bit (nu c).

    Thay i mch, ly d liu xut ra l Q nh hnh v:

    Hc k II/2014-2015 Trang 2 o Nguyn Quc Vinh - 1414674

    m t 3 v 0.

    m t 3 v 0.

  • B mn K thut my tnh Khoa Khoa hc v K thut my tnh

    CLK

    U1A

    7474

    2

    3

    5

    6

    41

    D

    CLK

    Q

    Q

    PR

    EC

    LR

    U1B

    7474

    12

    11

    9

    8

    1013

    D

    CLK

    Q

    Q

    PR

    EC

    LR

    A

    VCC

    VCCB

    Gi s ban u BA = 00, s chuyn trng thi ca mch:

    Sinh vin nhn xt mch trn lm nhim v:

    Rp mch, so snh kt qu thc nghim vi l thuyt. Gii thch v khc phc nguyn nhn dn ti s khc bit (nu c).

    Sinh vin rt ra kt lun v mi tng quan gia b m ln/xung vi ng ra l Q/Q, chn kch clock Q/Q, clock tch cc cnh ln/xung:

    Bi o s 2: mch m bt ng b 4 bit Da trn bi o s 1, sinh vin thit k mch m ln bt ng b 4 bit, m t 0 n 15 bng

    hai IC 74LS74.

    Mch:

    Rp mch, so snh kt qu thc nghim vi l thuyt. Gii thch v khc phc nguyn nhn dn ti s khc bit (nu c).

    Bi o s 3: kho st b m bt ng b

    Hc k II/2014-2015 Trang 3 o Nguyn Quc Vinh - 1414674

    m t 3 v 0.

    m t 2n1 v 0 vi n l s D Latch.

  • B mn K thut my tnh Khoa Khoa hc v K thut my tnh

    Cho mch nh hnh v:

    C

    12

    11

    9

    8

    1013

    D

    CLK

    Q

    Q

    PR

    EC

    LRCLK

    DB

    9

    108

    VCCA

    2

    3

    5

    6

    41

    D

    CLK

    Q

    Q

    PR

    EC

    LR

    1

    23

    4

    56

    12

    11

    9

    8

    1013

    D

    CLK

    Q

    Q

    PR

    EC

    LR

    2

    3

    5

    64

    1D

    CLK

    Q

    QP

    RE

    CLR

    Gi s ban u DCBA = 00, s chuyn trng thi ca mch (A l LSB):

    Sinh vin nhn xt mch trn lm nhim v:

    Rp mch, so snh kt qu thc nghim vi l thuyt. Gii thch v khc phc nguyn nhn dn ti s khc bit (nu c).

    Bi o s 4: thit k b m bt ng b Da trn bi o s 3, sinh vin thit k mch m ln bt ng b t 0 n 12 bng 2 IC

    74LS74 v 1 IC 74LS00

    Mch:

    Rp mch, so snh kt qu thc nghim vi l thuyt. Gii thch v khc phc nguyn nhn dn ti s khc bit (nu c).

    Bi o s 5: thit k b m bt ng b

    Hc k II/2014-2015 Trang 4 o Nguyn Quc Vinh - 1414674

    Mch sai

    m t 15 v 12 ri reset v 0.

  • B mn K thut my tnh Khoa Khoa hc v K thut my tnh

    Da trn cc bi o trc, sinh vin thit k mch m ln bt ng b 4 bit, m t 0 n 15 bng hai IC 74LS73.

    Mch:

    Rp mch, so snh kt qu thc nghim vi l thuyt. Gii thch v khc phc nguyn nhn dn ti s khc bit (nu c).

    Sinh vin lu v tr chn ngun, chn t ca IC 74LS73

    Bi o s 6: thit k b m bt ng b Sinh vin thit k mch m ln bt ng b t 0 n 12 bng 2 IC 74LS73 v 1 IC 74LS00

    Mch:

    Rp mch, so snh kt qu thc nghim vi l thuyt. Gii thch v khc phc nguyn nhn dn ti s khc bit (nu c).

    IV. Bi tp lm thm Bi o s 1: thit k mch m xung bt ng b

    Thit k v rp mch m xung t 15 n 0 bng 2 IC 74LS74.

    Hc k II/2014-2015 Trang 5 o Nguyn Quc Vinh - 1414674

  • B mn K thut my tnh Khoa Khoa hc v K thut my tnh

    Thit k v rp mch m xung t 15 n 7 bng 2 IC 74LS74 v 1 IC 74LS00.

    Bi o s 3*: trng hp c bit ca b

    m xung Thit k v rp mch m xung t 10 n 0.

    -

    Gii thch l do kt qu thc nghim chy khc vi thit k*.

    -

    ra gii php khc phc.

    -

    Rt ra kt lun v gi tr

    m khng nn s dng trong b

    m xung bt ng b.

    -

    Rt ra kt lun v gi tr

    m khng nn s dng trong b

    m ln bt ng b.

    Bi o s 2: thit k mch m xung bt ng b

    Mch:

    Mch:

    Mch:

    Hc k II/2014-2015 Trang 6 o Nguyn Quc Vinh - 1414674


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