FILTECH - Accurate Active & Passive Filter Design (IBM &compatibles) CAT.# 000-N02-00

  FILTECH is an advanced Circuit Synthesis Program that produces both Active &
  Passive Filter circuits for your specification .  With no mathematics or
  tedious manipulation of tables required , FILTECH makes the design of complex
  filter circuits fast , simple and accurate .  All you need to tell FILTECH
  are the frequency limits that your filter should have (Low Pass , High Pass ,
  Band Pass or Band Stop) , the stopband attenuation required and the maximum
  acceptable passband ripple .  FILTECH designs the filter circuit for you
  including all the component values.

  FILTECH includes a built-in Circuit Simulator allowing you to test the
  circuit immediately , comparing the simulated result with your original
  specification . You can even force the components to the nearest preferred
  value and check the effect on the filter performance at a glance .  HARDWARE
  REQUIREMENTS : 386 or better MS-DOS 3.0 or later , EGA or VGA , Hard Disk and
  a min.of 640KB of RAM and a Mouse . Printout requires a 9 or 24 pin Epson or
  IBM Graphics printer , LaserJet II printer or any equivalent