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LMF120 - Mask-Programmable Switched-Capacitor Active Filter System

Description

The LMF120 is a mask-programmable switched-capacitor filter capable of realizing virtually any filter response up to twelve poles using six independent biquad blocks.

It is customized to meet specific application requirements through the use of automated design techniques.

Features

  • Mask-programmable for virtually any filter response.
  • All filter types (low-pass, high-pass, bandpass, notch, all-pass).
  • All filter approximations (Butterworth, Chebyshev, Ellip- tic, Bessel, etc. ).
  • Up to 12 poles and right-half-plane zeros in one 16-pin package.
  • One, two, or three filters per package.
  • Wide Q range: up to 100 per biquad.
  • Choice of internal or external clock.
  • No external components other than clock or crystal.

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,------------------------------------------------------------------------, r iii: ~National -"T.1 ~ Semiconductor oI) LMF120 Mask-Programmable Switched-Capacitor Active Filter System General Description The LMF120 is a mask-programmable switched-capacitor filter capable of realizing virtually any filter response up to twelve poles using six independent biquad blocks. It is customized to meet specific application requirements through the use of automated design techniques. Circuit realization occurs during the final metal-mask stage of the manufacturing process. Three sample-and-hold inputs and three buffered outputs allow one, two, or three independent filters on a single chip. Each of the filters may be any type: high-pass, low-pass, allpass, bandpass, or notch.
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