You have me curious - How is the 747 different from any other noisy, drifty, hi-input current, op-amp from the early 1970's ?? Feedback is feedback isn't it? The modern op-amp designs seem so much better. "I'd walk a mile for a camel - no no that should be chopper stabilization." (And I have used my share of 747's when they were about the only game in town "for the rest of us".) Cheers Ed Thelen ----- Original Message ----- > From: "Larry Cochrane"
> > I like the 741 op-amp circuit. It has three different ways of controlling the gain! > > -Larry Cochrane > Redwood City, PSN __________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>