Click to expand full text
,------------------------------------------------------------------------, 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.