00338nam a2200133Ia 4500001000500000005001700005008004100022020001500063082002000078100001800098245002500116260001600141650004700157279220261006003643.0120911s9999    xx            000 0 und d  a0070684537  a621.3815324 WAT  aWaters, Allan  aActive filter design  aMcgraw Hill  aSystems engineering       Switching theory