13 down vote One reason we have a tendency to clock flip flops so there is not any chaos once the outputs of flip flops area unit fed through some logic functions and back to their own inputs. If a flip-flop\'s output is employed to calculate its input, it behooves North American nation to possess orderly behavior: to stop the flip-flop\'s state from dynamical till the output (and therefore the input) is stable. This duration permits North American nation to create computers, that area unit state machines: they need a current state, and calculate their next state supported the present state and a few inputs. For example, suppose we would like to create a machine that \"computes\" AN incrementing four bit count from 0000 to 1111, and so wraps around to 0000 and keeps going. we are able to do that by employing a four bit register (which may be a bank of 4 D flip-flops). The output of the register is place through a combinatorial logic perform that adds one (a four bit adder) to supply the incremented worth. This worth is then merely fed back to the register. Now, whenever the clock edge arrives, the register can settle for the new worth that is one and its previous worth. we\'ve AN orderly, certain behavior that steps through the binary numbers with none bug. Clocking behaviors area unit helpful in different things too. typically a circuit has several inputs, that don\'t stabilize at identical time. If the output is in a flash created from the inputs, then it\'ll be chaotic till the inputs stabilize. If we have a tendency to don\'t need the opposite circuits that rely on the output to examine the chaos, we have a tendency to create the circuit clocked. we have a tendency to permit a generous quantity of your time for the inputs to settle and so we have a tendency to enlighten the circuit to just accept the values. Clocking is additionally inherently a part of the linguistics of some forms of flip flops. A D flip flop can not be outlined while not a clock input. while not a clock input, it\'ll either ignore its D input (useless!), or just copy the input the least bit times (not a flip-flop!) AN RS flip-flop does not have a clock, however it uses 2 inputs to regulate the state that permits the inputs to be \"self clocking\": i.e. to be the inputs, in addition because the triggers for the physical change. All flip flops would like some combination of inputs that programs their state, and a few combination of inputs lets them maintain their state. If all mixtures of inputs trigger programming, or if all mixtures of inputs area unit unnoticed (state is maintained), that\'s not helpful. currently what\'s a clock? A clock may be a special, dedicated input that distinguishes whether or not the opposite inputs area unit unnoticed, or whether or not they program the device. it\'s helpful to possess this as a separate input, instead of for it to be encoded among multiple inputs. Solution 13 down vote One reason we have a tendency to clock flip flops so th.

1. 13
down vote
One reason we have a tendency to clock flip flops so there is not any chaos once the outputs of
flip flops area unit fed through some logic functions and back to their own inputs.
If a flip-flop's output is employed to calculate its input, it behooves North American nation to
possess orderly behavior: to stop the flip-flop's state from dynamical till the output (and
therefore the input) is stable.
This duration permits North American nation to create computers, that area unit state machines:
they need a current state, and calculate their next state supported the present state and a few
inputs.
For example, suppose we would like to create a machine that "computes" AN incrementing
four bit count from 0000 to 1111, and so wraps around to 0000 and keeps going. we are able to
do that by employing a four bit register (which may be a bank of 4 D flip-flops). The output of
the register is place through a combinatorial logic perform that adds one (a four bit adder) to
supply the incremented worth. This worth is then merely fed back to the register. Now, whenever
the clock edge arrives, the register can settle for the new worth that is one and its previous worth.
we've AN orderly, certain behavior that steps through the binary numbers with none bug.
Clocking behaviors area unit helpful in different things too. typically a circuit has several inputs,
that don't stabilize at identical time. If the output is in a flash created from the inputs, then it'll
be chaotic till the inputs stabilize. If we have a tendency to don't need the opposite circuits that
rely on the output to examine the chaos, we have a tendency to create the circuit clocked. we
have a tendency to permit a generous quantity of your time for the inputs to settle and so we have
a tendency to enlighten the circuit to just accept the values.
Clocking is additionally inherently a part of the linguistics of some forms of flip flops. A D flip
flop can not be outlined while not a clock input. while not a clock input, it'll either ignore its D
input (useless!), or just copy the input the least bit times (not a flip-flop!) AN RS flip-flop does
not have a clock, however it uses 2 inputs to regulate the state that permits the inputs to be "self
clocking": i.e. to be the inputs, in addition because the triggers for the physical change. All flip
flops would like some combination of inputs that programs their state, and a few combination of
inputs lets them maintain their state. If all mixtures of inputs trigger programming, or if all
mixtures of inputs area unit unnoticed (state is maintained), that's not helpful. currently what's a
clock? A clock may be a special, dedicated input that distinguishes whether or not the opposite
inputs area unit unnoticed, or whether or not they program the device. it's helpful to possess this
as a separate input, instead of for it to be encoded among multiple inputs.

2. Solution
13
down vote
One reason we have a tendency to clock flip flops so there is not any chaos once the outputs of
flip flops area unit fed through some logic functions and back to their own inputs.
If a flip-flop's output is employed to calculate its input, it behooves North American nation to
possess orderly behavior: to stop the flip-flop's state from dynamical till the output (and
therefore the input) is stable.
This duration permits North American nation to create computers, that area unit state machines:
they need a current state, and calculate their next state supported the present state and a few
inputs.
For example, suppose we would like to create a machine that "computes" AN incrementing
four bit count from 0000 to 1111, and so wraps around to 0000 and keeps going. we are able to
do that by employing a four bit register (which may be a bank of 4 D flip-flops). The output of
the register is place through a combinatorial logic perform that adds one (a four bit adder) to
supply the incremented worth. This worth is then merely fed back to the register. Now, whenever
the clock edge arrives, the register can settle for the new worth that is one and its previous worth.
we've AN orderly, certain behavior that steps through the binary numbers with none bug.
Clocking behaviors area unit helpful in different things too. typically a circuit has several inputs,
that don't stabilize at identical time. If the output is in a flash created from the inputs, then it'll
be chaotic till the inputs stabilize. If we have a tendency to don't need the opposite circuits that
rely on the output to examine the chaos, we have a tendency to create the circuit clocked. we
have a tendency to permit a generous quantity of your time for the inputs to settle and so we have
a tendency to enlighten the circuit to just accept the values.
Clocking is additionally inherently a part of the linguistics of some forms of flip flops. A D flip
flop can not be outlined while not a clock input. while not a clock input, it'll either ignore its D
input (useless!), or just copy the input the least bit times (not a flip-flop!) AN RS flip-flop does
not have a clock, however it uses 2 inputs to regulate the state that permits the inputs to be "self
clocking": i.e. to be the inputs, in addition because the triggers for the physical change. All flip
flops would like some combination of inputs that programs their state, and a few combination of
inputs lets them maintain their state. If all mixtures of inputs trigger programming, or if all
mixtures of inputs area unit unnoticed (state is maintained), that's not helpful. currently what's a
clock? A clock may be a special, dedicated input that distinguishes whether or not the opposite
inputs area unit unnoticed, or whether or not they program the device. it's helpful to possess this
as a separate input, instead of for it to be encoded among multiple inputs.