>This is my first attempt and things may change >but this works as it's drawn ..... I was so close.... Right after I sent that I made the following changes... Replaced first op-amp 100K fb resistor with 120K Replaced last op-amp 100K fb resistor with 220K Replaced res-loop 22K resistor with 33K. VERY Nice! I'll try to get a sample up later. -tg