I went to the Microchip dog and pony show in Chicago today and there they showed that FilterLab does high, low and bandpass filters. Already deleted the original post so maybe the OP was asking a different question? -------Original Message------- From: Olin Lathrop Sent: 06/11/03 06:22 AM To: PICLIST@MITVMA.MIT.EDU Subject: Re: Active Filter Design Software > > > Unfortunately, FilterLab > will currently only do low pass filters Yes, but a high pass filter can be thought of as just the original signal minus the low pass filter output. Note that you do have to pay attention to the phase angle when modeling the result. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads