Information Technology Reference
In-Depth Information
...
...
...
y
n
−
1
y
n
−
2
y
i
x
i
y
0
x
0
x
n
x
n
−
1
x
i
x
0
x
−
1
Outputs:
Inputs:
...
...
x
n
x
n
−
1
x
n
−
2
x
−
1
...
s
d
S/N-S
L/R
Shifter
Shift right
Shift left
...
...
y
n
−
1
y
i
y
0
Spin-wave switch
Figure
9.10.
Structure of a nanoscale spin-wave shifter using spin-wave switches.
This allows each node to receive the spin wave from its left neighbor, while
blocking the channel and preventing this received wave to go through to the next
node on the right hand side. Similarly, shifting to the left can be implemented by
forcing the waves to the left and blocking them at the immediate neighboring
node.
AS
PIN
-
WAVE
P-
SHIFTER
.Ap-shifter is a generalization of the simple shifter,
which has a (N+2p)-bit data-input, N-bit data output, a one-bit control inputs d
(for shifter direction), and a (log p)-bit control signal s (shift distance). In this
system, the data-input is shifted 0, 1,
y
, p positions (according to s)toeitherthe
right or left (according to d) [1]. The structure of a p-shifter is shown in Figure 9.11.
This structure contains log p nodes that represent the binary value of p, N+2p
input nodes, and N output nodes. All the input nodes' receiving frequency is tuned
on a common frequency f
adc
, and the output nodes' receiving frequencies on
distinct frequencies. First the binary value of p is converted to analog as explained
in Section 9.2.1. No additional node is required to keep this analog value, since all
x
n+p
−
1
x
n
x
n
−
1
x
i
x
0
x
x
x
p
1
p
−
−
−
...
...
...
...
s
d
S/N_S
L/R
P-Shifter
...
...
y
n
−
1
y
i
y
0
Shift register
control
Inputs
Outputs
...
...
...
x
n+p
−
1
x
n
x
n
−
1
x
i
x
0
x
x
y
n
−
1
y
i
y
0
p
k
−
1
p
k
−
2
p
0
−
1
−
p
...
...
...
...
...
...
1
f
i+p
f
i
−
p
P
(Shift right)
(Shift left)
Digital to analog
converter
Figure
9.11.
Structure of a nanoscale spin-wave p-shifter.
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