On Jul 4, 2006, at 10:59 PM, Palaniappan C wrote: > Hi all, > > I want to shift a analog signal 5v down (or subtract 5 v). > I found clipper and clamper circuits using diode and additional > voltage source. > Is there any solution without using additional voltage source ? How much current? From what starting voltage? You're going to have to be a little more specific about what you're attempting to do -- the number of answers you'll get from this crowd will amaze you, unless it's something really really obviously solved by a standard circuit. -- Nate Duehr nate@natetech.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist