Datasheet > LF43891

LF43891

更新时间： 2024-11-22 22:47:11

品牌	Logo	应用领域
逻辑 - LOGIC		/
页数	文件大小	规格书
11页	81K
描述
9 x 9-bit Digital Filter

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LF43891 数据手册

LF43891

DEVICES INCORPORATED

9 x 9-bit Digital Filter

LF43891

9 x 9-bit Digital Filter

DEVICES INCORPORATED

FEATURES

DESCRIPTION

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-

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

❑ 30 MHz Maximum Sampling Rate

❑ 320 MHz Multiply-Accumulate Rate

❑ 8 Filter Cells

❑ 8-bit Unsigned or 9-bit Two’s

plier, three decimation registers, and a may be processed without overflows

Complement Data/ Coefficients

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.

due to the architecture of the device.

❑ 26-bit Data Outputs

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

❑ Shift-and-Add Output Stage for

Combining Filter Outputs

❑ Expandable Data Size, Coefficient

Size, and Filter Length

❑ User-Selectable 2:1, 3:1, or 4:1

Decimation

❑ Replaces Harris HSP43891

❑ 84-pin PLCC, J-Lead

Expanded coefficients and word sizes also be achieved using these registers.

can be processed by cascading mul-

tiple LF43891s to implement larger

filter lengths without affecting the

sample rate. By reducing the sample

LF43891 BLOCK DIAGRAM

DIENB, CIENB,

DIN8-0

ERASE, DCM1-0

FILTER

CELL 0

FILTER

CELL 1

FILTER

CELL 2

FILTER

CELL 3

FILTER

CELL 4

FILTER

CELL 5

FILTER

CELL 6

FILTER

CELL 7

CIN8-0

COUT8-0

COENB

ADR2-0

MUX

SHADD

OUTPUT

STAGE

SENBL

SENBH

RESET

CLK

TO ALL CELLS

TO ALL REGISTERS

SUM25-0

Video Imaging Products

08/16/2000–LDS.43891-J

12 3 4 5 6 7...11

中文翻译

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与LF43891相关器件

型号	品牌	获取价格	描述	数据表
LF43891GC25	LOGIC	获取价格	Digital Filter, 9-Bit, CMOS, CPGA84, CERAMIC, PGA-84
LF43891GC33	LOGIC	获取价格	Digital Filter, 9-Bit, CMOS, CPGA84, CERAMIC, PGA-84
LF43891GC40	LOGIC	获取价格	Digital Filter, 9-Bit, CMOS, CPGA84, CERAMIC, PGA-84
LF43891GC50	LOGIC	获取价格	Digital Filter, 9-Bit, CMOS, CPGA84, CERAMIC, PGA-84
LF43891GM33	ETC	获取价格	Digital Filter
LF43891GM40	ETC	获取价格	Digital Filter
LF43891GM50	ETC	获取价格	Digital Filter
LF43891GMB33	LOGIC	获取价格	Digital Filter, 9-Bit, CMOS, CPGA84, CERAMIC, PGA-84
LF43891GMB40	ETC	获取价格	Digital Filter
LF43891GMB50	LOGIC	获取价格	Digital Filter, 9-Bit, CMOS, CPGA84, CERAMIC, PGA-84