Questions and answers of "basic experiment" in the first semester of the 22nd academic year of Xi'an University of Electronic Science and technology

Answer private chat ...

One 、 Logic gate test experiment Standard for evaluation ： Full marks 25 branch

The schematic diagram of and gate test is shown in Figure 1（

a） Shown , Refer to this figure to connect the test circuit for experiment （ Please see the 【 Experimental course 】

experiment 4.2） .

1. On the answer sheet chart 1（

b） The input signal is given in A、B It's worth , Please look at the picture 1（

b） Fill in the output variable

The amount F It's worth .

2. On the answer sheet chart 1（

c） Given in A、B Input waveform , Please look at the picture 1（

c） Draw in F The loss of

Output waveform .

A

B

F

chart 1(a) Schematic diagram of and gate test The first 2 page （ common 4 page ）

Two 、 Combinational logic circuit experiment Standard for evaluation ： Full marks 25 branch

The schematic diagram of full adder is shown in Figure 2（

a） Shown , Refer to this figure to connect the test circuit for experiment （ Please see the 【 Experimental course 】

experiment 4.3 ）.

1. On the answer sheet chart 2（

b） The input signal is given in Ai、Bi And Ci It's worth , Please fill in the output variable Ci+1 And Si

It's worth .

2. On the answer sheet chart 2（

c） The waveform of the input signal is given in , Please draw the waveform of the output signal .

=1

=1

&

&

&

Ai

Bi

Ci

Si

Ci+1

chart 2（

a） Schematic diagram of full adder

3、 ... and 、 Decoder experiment Standard for evaluation ： Full marks 25 branch

74138/74LS138 The schematic diagram of the decoder is shown in Figure 3（

a） Shown , Refer to this figure to connect the test circuit for experiment （ Can refer to

reading 【 Experimental course 】 experiment 4.4）.

1. On the answer sheet chart 3（

b） The input signal is given in C、B And A It's worth , Please fill in the value of the output signal .

2. On the answer sheet chart 3（

c） The waveform of the input signal is given in , Please draw the waveform of the output signal .

A

B

C

Y0

Y1

Y2

Y3

Y4

Y5

Y6

Y7

chart 3（

a） Schematic diagram of decoder

Four 、 trigger experiment Standard for evaluation ： Full marks 25 branch The first 3 page （ common 4 page ）

The schematic diagram of trigger experiment is shown in Figure 4（

a） Shown , among R Is the start signal , First in the experiment R Load a negative pulse at the end

Punch to determine the initial state of the four triggers . Refer to this figure to connect the test circuit for experiment （ Please see the 【 Experimental course 】 real

Examination 4.5）, On the answer sheet chart 4（

b） Fill in the register status table ; On the answer sheet chart 4（

c） Draw the circuit in

Simulation oscillogram .

CP

R

Q1

Q2

Q3

Q4

chart 4（

a） Schematic diagram of trigger experiment The first 4 page （ common 4 page ）

Answer sheet （ Be careful , Candidates only take photos and upload the following experimental results , Uploading other materials is invalid .）

surname name

learn Number

Learning Center / Correspondence Station

Input

Ai Bi Ci

Output

Ci+1 Si

0 0 0

0 0 1

0 1 0

0 1 1

1 0 0

1 0 1

1 1 0

1 1 1

chart 2(b) test result

Ai

Ci

Bi

Ci+1

Si

chart 2(c) Simulation oscillogram

A

B

F

chart 1(c) Simulation waveform

Input

Output

A B

F

0 0

0 1

1 0

1 1

chart 1(b) test result

transport Enter into

C B A

transport Out

YO Y1 Y2 Y3 Y4 Y5 Y6 Y7

0 0 0

0 0 1

0 1 0

0 1 1

1 0 0

1 0 1

1 1 0

1 1 1

chart 3(b) test result

C

A

B

Y0

Y2

chart 3(c) Simulation oscillogram

Y1

Y3

Y4

Y6

Y5

Y7

CP

Q1 Q2 Q3 Q4

chart 4(b) Register status table

1

2

3

4

CP

Q1

Q2

Q3

Q4

chart 4(c) Simulation oscillogram