I'm out of my element when it comes to practical PLL circuits. I'm considering using a PLL to create a 25MHz signal which should be phase locked to an input reference 20MHz signal. Do you know of some ICs that I could consider for this purpose? Most of the ones that I have seen quote significantly higher frequency values. Usually higher than 200 MHz. Thanks, --=20 Martin K. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .