"Opamps for Everyone" Extremely comprehensive Opamp design guide. More depth than an average application note (as you'd expect from 400+ page= s.) Free TI 464 page PDF http://bit.ly/TI_OpampsforEveryone --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .