: .
, , . , , . .
, , :
Q, , . .
:
, .
. , ( ), ( ).
, , , .
.
1. RS-
RS-
Ȗ Ȗ, . Ȗ . 28.
. 28.
RS- Ȗ: ;( ) , . - . , Q,
., (Q = 1, = 0), S ( Set ), (Q = 0, = 1) R (reset ).
(. 6), , . RS- . 29.
6
t n |
t n+1 |
||
Rn |
Sn |
Qn |
Qn+1 |
0 0 1 1 0 0 1 1 |
0 1 0 1 0 1 0 1 |
0 0 0 0 1 1 1 1 |
0 1 0 1 1 0 |
.
, :
RS- (. 30):
() Q
n () Qn+1., .
Qn ® Qn+1:
0 ® 0; 0 ® 1; 1 ® 0; 1 ® 1.
,
.
RS- (. 7), , n (n + 1). RS- Ȗ, , . 31.
- RS- .
RS-. , - . . () , RS- R S C, (. 32).
RS- . , .. , Q
n+1 = Qn , , R = S = 1 ( R = S = 0 )..32. RS- -
, . , . , .
. , . , , , , .
. 33. RS- .
. , .
, RS- .
2. D-
, Q
(n+1) D n. , D- , D. delay . D- :.
D- , , D- . 8. (=1
), . . D- . , , .D- (. 9)
D- .34.
.34. D- = 1
3. T-
-, , -. , . , ( ), - (-).
- .
-
.
- . 10, . 35.
- - - . - , .
. 35. - : -; -
, , D- (. 36).
-, .
4. JK-
JK- , , , RS-, J S, K- ®-. . JK- . (. 11)
(. 37) .
.
JK-
000=, K J =0,
011=, K J =1.
100=, J K =1,
111=, J K =0.
(. 12), JK-. JK- RS- . JK- . 38.
, .
JK- .
. 38. JK-
JK- . . -, , , , -, .
, , J=D
K=, JK- :,
D-.
T- J K . T-. T- J K , (.39).
. 39. JK- : D-; T-; T-
JK- .
, , .
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