Palaniappan C wrote: > You are correct, the IC can't handle negative peak. I thought of > limiting it after shifting. On the other hand, limiting the waveform > first and then shifting is also fine, I thinking of trying both. A limiter is going to introduce harmonics. That is a bad thing if you want to get regulatory approval. What is the overall application that requires so much power from a RFID tag? ****************************************************************** Embed Inc, Littleton Massachusetts, (978) 742-9014. #1 PIC consultant in 2004 program year. http://www.embedinc.com/products -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist