General-Purpose Lowpass Filters
This chapter is devoted to simplified design with general-purpose lowpass IC filters (the EXAR Corporation XR-1001/8). Each of these ICs is a 4th-order switched-capacitor lowpass filter providing 24-dB/octave (Butterworth) of rolloff outside of the passband. The series of 8 ICs provides for Butterworth, Bessel, or Chebyshev (0.5 or 0.1 dB of ripple) responses, depending on model number. Each filter response is available in 50:1 and 100:1 clock-to-corner ratios. All of the ICs have the same 8-pin pinout, so one can easily be substituted for the other, depending on application.
As in the case of other switched-capacitor filters, these ICs have the ability to tune the corner frequency of the filter response ...
Get Simplified Design of Filter Circuits now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
