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參數(shù)資料
| 型號(hào)： | LF43881 |
| 廠商： | Logic Devices Incorporated |
| 英文描述： | 8 x 8-bit Digital Filter |
| 中文描述： | 8 × 8位數(shù)字濾波器 |
| 文件頁數(shù)： | 1/11頁 |
| 文件大小： | 82K |
| 代理商： | LF43881 |
DEVICES INCORPORATED
LF43881
8 x 8-bit Digital Filter
8 x 8-bit Digital Filter
Video Imaging Products
08/16/2000–LDS.43881-J
1
K
25 MHz Maximum Sampling Rate
K
320 MHz Multiply-Accumulate Rate
K
8 Filter Cells
K
8-bit Unsigned or Two’s Complement
Data
K
8-bit Unsigned or Two’s Complement
Coefficients
K
26-bit Data Outputs
K
Shift-and-Add Output Stage for
Combining Filter Outputs
K
Expandable Data Size, Coefficient
Size, and Filter Length
K
User-Selectable 2:1, 3:1, or 4:1
Decimation
K
Replaces Harris HSP43881
K
84-pin PLCC, J-Lead
FEATURES
DESCRIPTION
DEVICES INCORPORATED
The
LF43881
is a video-speed digital
filter that contains eight filter cells
(taps) cascaded internally and a shift-
and-add output stage. An 8 x 8
multiplier, three decimation registers,
and a 26-bit accumulator are con-
tained in each filter cell. The output
stage of the LF43881 contains a 26-bit
accumulator which can add the
contents of any filter stage to the
output stage accumulator shifted right
by 8 bits. 8-bit unsigned or two’s
complement format for data and
coefficients can be independently
selected.
Expanded coefficients and word sizes
can be processed by cascading mul-
tiple LF43881s to implement larger
filter lengths without affecting the
sample rate. By reducing the sample
rate, a single LF43881 can process
larger filter lengths by using multiple
passes. The sampling rate can range
from 0 to 40 MHz. Over 1000 taps
may be processed without overflows
due to the architecture of the device.
The output sample rate can be re-
duced to one-half, one-third, or one-
fourth the input sample rate by using
the three decimation registers con-
tained in every filter cell. Matrix
multiplication, N x N spatial correla-
tions/ convolutions, and other 2-D
operations for image processing can
also be achieved using these registers.
LF43881 B
LOCK
D
IAGRAM
FILTER
CELL 0
FILTER
CELL 1
8
FILTER
CELL 2
8
8
FILTER
CELL 3
8
FILTER
CELL 4
8
FILTER
CELL 5
8
FILTER
CELL 6
8
FILTER
CELL 7
8
26
26
26
26
26
26
26
26
8
MUX
5
DIN
7-0
TCS
DIENB, CIENB,
ERASE, DCM
1-0
TCCI
CIN
7-0
ADR
2-0
3
OUTPUT
STAGE
26
26
SHADD
SENBL
SENBH
SUM
25-0
8
TCCO
COUT
7-0
COENB
TO ALL REGISTERS
CLK
TO ALL CELLS
RESET
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LF43881GC25 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital Filter |
| LF43881GC33 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital Filter |
| LF43881GC40 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital Filter |
| LF43881GC50 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital Filter |
| LF43881GM33 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital Filter |
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