> As you may know this is to power a microphone pre-amp and other related > circuitry. The calculated maximum input from the microphone is going to > be > 35.52 Volts pk to pk, and this cannot be altered. Sure it can. You can easily attenuate the microphone input with passive components before it reaches anything powered. The real question is what is the maximum voltage range your circuit must produce? Does this have to be single ended? What is your circuit driving? ******************************************************************** Olin Lathrop, embedded systems consultant in Littleton Massachusetts (978) 742-9014, olin@embedinc.com, http://www.embedinc.com -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body