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Número de pieza
componentes Descripción
LMS12 Ver la hoja de datos (PDF) - LOGIC Devices
Número de pieza
componentes Descripción
Fabricante
LMS12
12-bit Cascadable Multiplier-Summer
LOGIC Devices
LMS12 Datasheet PDF : 9 Pages
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DEVICES INCORPORATED
LMS12
12-bit Cascadable Multiplier-Summer
T
ABLE
1. T
IMING
E
XAMPLE FOR
5-T
AP
N
ONDECIMATING
FIR F
ILTER
CLK Cycle
1
2
3
4
5
6
X
(n)
X
n
X
n+1
X
n+2
X
n+3
X
n+4
X
n+5
A
4
Register
Sum 4
X
n
X
n+1
X
n+2
X
n+3
X
n+4
h
4
X
n
h
4
X
n+1
h
4
X
n+2
h
4
X
n+3
A
3
Register
Sum 3
X
n
X
n+1
X
n+2
X
n+3
X
n+4
h
3
X
n
h
3
X
n+1
h
3
X
n+2
h
3
X
n+3
+ h
4
X
n–1
+ h
4
X
n
+ h
4
X
n+1
+ h
4
X
n+2
A
2
Register
Sum 2
X
n
X
n+1
X
n+2
X
n+3
X
n+4
h
2
X
n
h
2
X
n+1
h
2
X
n+2
h
2
X
n+3
+ h
3
X
n–1
+ h
3
X
n
+ h
3
X
n+1
+ h
3
X
n+2
+ h
4
X
n–2
+ h
4
X
n–1
+ h
4
X
n
+ h
4
X
n+1
A
1
Register
Sum 1
X
n
X
n+1
X
n+2
X
n+3
X
n+4
h
1
X
n
h
1
X
n+1
h
1
X
n+2
h
1
X
n+3
+ h
2
X
n–1
+ h
2
X
n
+ h
2
X
n+1
+ h
2
X
n+2
+ h
3
X
n–2
+ h
3
X
n–1
+ h
3
X
n
+ h
3
X
n+1
+ h
4
X
n–3
+ h
4
X
n–2
+ h
4
X
n–1
+ h
4
X
n
A
0
Register
Sum 0
X
n
X
n+1
X
n+2
X
n+3
X
n+4
h
0
X
n
h
0
X
n+1
h
0
X
n+2
h
0
X
n+3
+ h
1
X
n–1
+ h
1
X
n
+ h
1
X
n+1
+ h
1
X
n+2
+ h
2
X
n–2
+ h
2
X
n–1
+ h
2
X
n
+ h
2
X
n+1
+ h
3
X
n–3
+ h
3
X
n–2
+ h
3
X
n–1
+ h
3
X
n
+ h
4
X
n–4
+ h
4
X
n–3
+ h
4
X
n–2
+ h
4
X
n–1
7
X
n+6
X
n+5
h
4
X
n+4
X
n+5
h
3
X
n+4
+ h
4
X
n+3
X
n+5
h
2
X
n+4
+ h
3
X
n+3
+ h
4
X
n+2
X
n+5
h
1
X
n+4
+ h
2
X
n+3
+ h
3
X
n+2
+ h
4
X
n+1
X
n+5
h
0
X
n+4
+ h
1
X
n+3
+ h
2
X
n+2
+ h
3
X
n+1
+ h
4
X
n
8
X
n+7
X
n+6
h
4
X
n+5
X
n+6
h
3
X
n+5
+ h
4
X
n+4
X
n+6
h
2
X
n+5
+ h
3
X
n+4
+ h
4
X
n+3
X
n+6
h
1
X
n+5
+ h
2
X
n+4
+ h
3
X
n+3
+ h
4
X
n+2
X
n+6
h
0
X
n+5
+ h
1
X
n+4
+ h
2
X
n+3
+ h
3
X
n+2
+ h
4
X
n+1
9
X
n+8
X
n+7
h
4
X
n+6
X
n+7
h
3
X
n+6
+ h
4
X
n+5
X
n+7
h
2
X
n+6
+ h
3
X
n+5
+ h
4
X
n+4
X
n+7
h
1
X
n+6
+ h
2
X
n+5
+ h
3
X
n+4
+ h
4
X
n+3
X
n+7
h
0
X
n+6
+ h
1
X
n+5
+ h
2
X
n+4
+ h
3
X
n+3
+ h
4
X
n+2
F
IGURE
2
A
. I
NPUT
F
ORMATS
A
IN
B
IN
11 10 9
–2
0
2
–1
2
–2
(Sign)
Fractional Two’s Complement
210
2
–9
2
–10
2
–11
11 10 9
–2
0
2
–1
2
–2
(Sign)
210
2
–9
2
–10
2
–11
11 10 9
–2
11
2
10
2
9
(Sign)
Integer Two’s Complement
210
2
2
2
1
2
0
11 10 9
–2
11
2
10
2
9
(Sign)
210
2
2
2
1
2
0
F
IGURE
2
B
. O
UTPUT
F
ORMATS
25 24
–2
3
2
2
(Sign)
25 24
–2
25
2
24
(Sign)
Fractional Two’s Complement
23 22 21
2
1
2
0
2
–1
14 13 12
2
–8
2
–9
2
–10
11 10 9
2
–11
2
–12
2
–13
Integer Two’s Complement
23 22 21
2
23
2
22
2
21
14 13 12
2
14
2
13
2
12
11 10 9
2
11
2
10
2
9
210
2
–20
2
–21
2
–22
210
2
2
2
1
2
0
Multiplier-Summers
3
08/16/2000–LDS.S12-J
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