Chapter 35: Sequential Logic Circuits
MULTIPLE CHOICE
1. The ____ flip-flop is formed by two cross-coupled NOR or NAND gates and has two outputs and two
controlling inputs.
a.
Clocked RS
c.
JK
b.
D
d.
RS
2. A(n) ____ flip-flop is useful where only one data bit (1 or 0) is to be stored.
a.
RS
c.
D
b.
Clocked RS
d.
JK
3. The ____ flip-flop is also referred to as a delay flip-flop.
a.
D
c.
JK
b.
RS
d.
Clocked RS
4. The ____ flip-flop is the most widely used flip-flop.
a.
D
c.
RS
b.
JK
d.
Clocked RS
5. A ____ is a logic circuit that can count a sequence of numbers or states when activated by a clock
input.
a.
multivibrator
c.
counter
b.
shift register
d.
latch
6. The maximum number of binary states in which a counter can exist depends on the number of flip-
flops in the counter. This can be expressed as ____.
a.
N = 2n
c.
N = 2n + 1
b.
N = 2n + 1
d.
N = 2n – 1
7. Asynchronous counters are commonly referred to as ____ counters.
a.
decade
c.
ripple
b.
up-down
d.
parallel
8. A(n) ____ counter can count in either direction through a certain sequence.
a.
decade
c.
ripple
b.
up-down
d.
parallel
9. ____ is used for the temporary storage of programs, data, control information, and has the capability to
both read and write data.
a.
EEPROM
c.
PROM
b.
ROM
d.
RAM
10. ____ are used where data need to be maintained for later use, such as the custom guide in a television
satellite system.
a.
EEPROMs
c.
SRAMs
b.
PROMs
d.
DRAMs
COMPLETION
1. The basic building block for sequential logic circuits is the ____________________.
2. A(n) ____________________ is a device that serves as a temporary buffer memory.
3. The number of counts or states through which a counter progresses before returning to its original state
(recycling) is called the ____________________ of the counter.
SHORT ANSWER
1. Describe how the synchronous counter operates.
2. Describe the three requirements for the use of shift registers as temporary storage.
