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GR581 の電気的特性と機能

GR581のメーカーはGennum Corporationです、この部品の機能は「Adaptive Highpass Filter」です。


製品の詳細 ( Datasheet PDF )

部品番号 GR581
部品説明 Adaptive Highpass Filter
メーカ Gennum Corporation
ロゴ Gennum Corporation ロゴ 




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GR581 Datasheet, GR581 PDF,ピン配置, 機能
Adaptive Highpass Filter
with Independent Gain Block
FEATURES
• unity gain 12 dB/oct. highpass Butterworth filter
• adaptive frequency range from 200 Hz to 2 kHz
• rectifier threshold set to 82 dBSPL (adjustable)
• low noise, typically 2.6 µV
• 300 µA typical current drain
• operates from 1.1 to 3 VDC
• preamplifier with 56 dB open loop gain
PACKAGING
• 10 pin MICROpac
• 10 pin PLID®
• Chip (73 x 59 mils)
GR581 DATA SHEET
DESCRIPTION
The GR581 is a level-sensitive, adaptive highpass filter
comprised of a current controlled highpass filter, a half- wave
rectifier, a voltage regulator for microphone bias and a separate
preamplifier.
The internal rectifier senses the long term average signal level
and controls the filter response by setting the control current
of the filter. The rectifier sensitivity, with respect to the input
signal, can be increased by placing the internal preamplifier
(A) before the filter section of the GR581. The preamplifier has
an internal 265 kfeedback resistor from its input to output, to
facilitate in setting the gain.
An increase of 20 dB above the rectifier threshold will
automatically increase the corner frequency one decade
above the initial corner frequency. The filter will only allow an
increase in corner frequency of one decade, regardless of
further increases in the input signal level.
It is recommended that the attack and release times be set to
30 ms and 90 ms respectively. The average time period of a
speech frame is about 15 ms which is not long enough to
activate the filter, however long term average noise, which can
have time periods greater than 30 ms, will activate the filter
(providing that the amplitude is above the rectifier threshold).
The GR581 is an improved version of the LS581adaptive high
pass filter and has an identical pinout.
www.DataSheet4U.com
VB
1
VREG
2
VREG
6
A IN
-A
265k 5
+ 10
B B OUT
-
RECTIFIER
10k
98 3 7 4
A OUT CA CB RECT IN GND RECTCAP
All resistors in ohms, all capacitors
in farads unless otherwise stated.
FUNCTIONAL BLOCK DIAGRAM
Revision Date: January 2001
Document No. 520 - 60 - 05
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-2814
Gennum Japan Corporation: C-101, Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168-0081, Japan tel. (03) 3334-7700 fax:(03) 3247-8839

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GR581 pdf, ピン配列
0µ1 1
VB
2
VREG
VIN
0µ1
6
-A
265k 5
S1
10n
AC1
10n
+ 10
B
-
RECTIFIER
10k
98 3 7 4
2µ2
2µ2
S2
AC2
83k5
0µ1 8k4
82k
LTC1001
+
-
V OUT
All resistors in ohms, all capacitors
in farads unless otherwise stated.
2
265k
6
7
10k
3_
Fig. 1 Test Circuit
5 89
REGULATOR
BASE
CURRENT
COMP.
VIRTUAL
GROUND
13k5 56k _
CONTROL
180
1
I
10
All resistors in ohms, all capacitors
in farads unless otherwise stated.
4
Fig. 2 Functional Schematic
VB
1
0µ1
2
VREG
6
0µ1
www.DataSheet4U.com
-A
265k 5
GR581
4 RMIC
+
B
10 0µ1 10k
3
-A
-
RECTIFIER
10k
98 3 7 4
100k
10n 10n
45k
0µ1
2µ2
All resistors in ohms, all capacitors
in farads unless otherwise stated.
Fig. 3 Typical Hearing Instrument Application
3
GP509
5
21k
-B
6
RE
18
2
7
87
520 - 60 - 05


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共有リンク

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部品番号部品説明メーカ
GR581

Adaptive Highpass Filter

Gennum Corporation
Gennum Corporation


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