378
Digital Electronics
S
0
0
1
1
0
0
1
1
Q n+1
0
0
1
Indeter
1
0
1
Indeter
Qn
0
0
0
0
1
1
1
1
R
0
1
0
1
0
1
0
1
S
0
0
1
1
0
0
1
1
Q n+1
Indeter
1
0
0
Indeter
1
0
1
Qn
0
0
0
0
1
1
1
1
R
0
1
0
1
0
1
0
1
X
X
1
1
1
00
01
11
10
SR
Q n
0
1
X
X
1
1
1
00
01
11
10
SR
Q n
0
1
(c)
(d)
(b)
(a)
Figure 10.20 (a) Characteristic table of an R-S flip-flop with active LOW inputs, (b) the characteristic table of
an R-S flip-flop with active HIGH inputs, (c) the K-map solution of an R-S flip-flop with active LOW inputs and
(d) the K-map solution of an R-S flip-flop with active HIGH inputs.