Can anyone explain what IIR stands for? I am referring to the filter program on the pic site written by Toney Kubeck. I have been only programming the pic for a couple of weeks now and I am trying to filter a noisy analog input. It is necessary to use the 10 bit converter because of the needed resolution so I have to work with two bytes (adresh, adresl). Can anyone help explain this program in 'laymen's' terms or help in providing an example? -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu