Thanks. I had completely forgotten about the 2pi factor...It's been quite a few tim= e since the last time I saw poles and zeroes Regards Julio 2005/10/11, Michael Rigby-Jones : > > > > >-----Original Message----- > >From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] > >Sent: 11 October 2005 07:24 > >To: piclist@mit.edu > >Subject: [EE] Filter question > > > > > > > 1/( 2* PI * 1uF * 3.3M ) =3D 0.05Hz > > 1/( 1uF * 3.3M ) =3D 0.3 Radians/second > > Regards > > Mike > > > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist