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GR581

Part Number	GR581
Manufacturer	Gennum Corporation
Description	Adaptive Highpass Filter
Published	Apr 2, 2011
Detailed Description	Adaptive Highpass Filter with Independent Gain Block GR581 DATA SHEET FEATURES • unity gain 12 dB/oct. highpass Butterwo...
Datasheet	GR581 PDF File

Overview

Adaptive Highpass Filter with Independent Gain Block GR581 DATA SHEET 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 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 curre...

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