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GR581 Datasheet Adaptive Highpass Filter

Manufacturer: Gennum Corporation

Overview: Adaptive Highpass Filter with Independent Gain Block GR581 DATA.

Datasheet Details

Part number GR581
Manufacturer Gennum Corporation
File Size 104.55 KB
Description Adaptive Highpass Filter
Datasheet GR581_GennumCorporation.pdf

General Description

The GR581 is a level-sensitive, adaptive highpass filter prised 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.

Key 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.

More Datasheets from Gennum Corporation

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