On Sat, Jan 29, 2011 at 4:07 PM, Olin Lathrop wr= ote: > V G wrote: > > 2. Is it critical what opamp I use for the right leg driver? Can I > > use an LM324? > > That should be fine. Strictly speaking, you don't need a right leg drive= r > at all. However, especially when your diff amp common mode rejection is > suspect, its a good idea. It's a low frequency signal that mostly just h= as > to drive the body capacitance, so just about anything, including a LM324 > should be fine, assuming it can drive with enough range. > Thank you. I'll make a simple circuit, test it with an oscilloscope as soon as I can get my hands on one and report back. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .