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参数资料
| 型号： | LF43891JC40 |
| 厂商： | LOGIC DEVICES INC |
| 元件分类： | 数字信号处理外设 |
| 英文描述： | 9 x 9-bit Digital Filter |
| 中文描述： | 9-BIT, DSP-DIGITAL FILTER, PQCC84 |
| 封装： | PLASTIC, LCC-84 |
| 文件页数： | 1/11页 |
| 文件大小： | 79K |
| 代理商： | LF43891JC40 |
DEVICES INCORPORATED
LF43891
9 x 9-bit Digital Filter
9 x 9-bit Digital Filter
Video Imaging Products
08/16/2000–LDS.43891-J
1
K
30 MHz Maximum Sampling Rate
K
320 MHz Multiply-Accumulate Rate
K
8 Filter Cells
K
8-bit Unsigned or 9-bit Two’s
Complement Data/ 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 HSP43891
K
84-pin PLCC, J-Lead
FEATURES
DESCRIPTION
DEVICES INCORPORATED
The
LF43891
is a video-speed digital
filter that contains eight filter cells
(taps) cascaded internally and a shift-
and-add output stage. A 9 x 9 multi-
plier, three decimation registers, and a
26-bit accumulator are contained in
each filter cell. The output stage of the
LF43891 contains a 26-bit accumulator
which can add the contents of any
filter stage to the output stage accu-
mulator shifted right by 8 bits. 8-bit
unsigned or 9-bit two’s complement
format for data and coefficients can be
independently selected.
Expanded coefficients and word sizes
can be processed by cascading mul-
tiple LF43891s to implement larger
filter lengths without affecting the
sample rate. By reducing the sample
rate, a single LF43891 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.
LF43891 B
LOCK
D
IAGRAM
FILTER
CELL 0
FILTER
CELL 1
9
FILTER
CELL 2
9
9
FILTER
CELL 3
9
FILTER
CELL 4
9
FILTER
CELL 5
9
FILTER
CELL 6
9
FILTER
CELL 7
9
26
26
26
26
26
26
26
26
9
MUX
5
DIN
8-0
DIENB, CIENB,
ERASE, DCM
1-0
CIN
8-0
ADR
2-0
3
OUTPUT
STAGE
26
26
SHADD
SENBL
SENBH
SUM
25-0
9
COUT
8-0
COENB
TO ALL REGISTERS
CLK
TO ALL CELLS
RESET
相关PDF资料 |
PDF描述 |
|---|---|
| LF43891 | 9 x 9-bit Digital Filter |
| LF43891JC33 | 9 x 9-bit Digital Filter |
| LF48908QC25 | Two Dimensional Convolver |
| LF48908QC31 | Two Dimensional Convolver |
| LF48908 | Two Dimensional Convolver |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LF43891JC50 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Digital Filter |
| LF43891QC25 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Digital Filter |
| LF43891QC33 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Digital Filter |
| LF43891QC40 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Digital Filter |
| LF43891QC50 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Digital Filter |
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