Filters

DSPs@ PWM@

books:

• Rapid Practical Designs of Active Filters  By David E. Johnson and John L. Hilburn Wiley-Interscience / John Wiley and Sons, Inc. ISBN: 0-471-44304-2
• Manual of Active Filter Design By David E. Johnson and John L. Hilburn McGraw-Hill ISBN: 0-07-028759-7

See also:

• http://sim.okawa-denshi.jp/en/Fkeisan.htm Web based Filter Design and Analysis