kvant
MemberJoined: Sep. 17, 2007
Locale: Raleigh, NC
Total Posts: 79 |  posted 02-21-2008 08:40 PM CST (US)   |  | 
Your circuit looks fine to me, I believe that both opamps you have can safely be used there. In your original version you wrote values of the resistors at the opamp's output as 1k (Tangent has this value in his text). That seems too high to me. Assume you are really sinking/sourcing 16mA there, that would mean 16V drop across the resistor - way too much for 9V supply (well, way too much for any supply). Something like 100 ohm or perhaps even lower would be more sensible, but don't drop them completely as they help to split the current evenly between the two opamps.> In my head, they do voltage splitting for the op-amp, which then powers the rest of the circuit, like a buffer. Correct? Correct. > BTW, if it makes sense, I can go for two batteries in series. Should I? I think that higher voltage like that can only improve performance. You can always experiment and decide afterwards, what works better for you. |
