|
|
PDF GR581 Data sheet ( Hoja de datos )
| Número de pieza | GR581 | |
| Descripción | Adaptive Highpass Filter | |
| Fabricantes | Gennum Corporation | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de GR581 (archivo pdf) en la parte inferior de esta página. Total 4 Páginas | ||
|
No Preview Available !
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 kΩ feedback 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
1 page | ||
| Páginas | Total 4 Páginas | |
| PDF Descargar | [ Datasheet GR581.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| GR581 | Adaptive Highpass Filter | Gennum Corporation |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |