Op-amp Delay Line Oscillator

Everything is definitely not better with op amps! Op amps have lots of transistors and other components. So, although these are amazing & useful devices, if you can build circuits with discrete components, its often far better.

Nice

@zorgrian: I believed in "simple is better" for a very long time. In the end, I was forced to the conclusion that such a belief is itself overly simplistic. I remain impressed by simple solutions which are also good, but recognise that seeking simplicity is often a logical contradiction in its own simple self. Like many human beliefs, it's something which only works if you don't examine it too closely. It often comes down to a choice between simple interface or simple implementation. Contrary to certain programmers who I suspect of having ulterior motives, for my choices -- such as achieving goals or even long-term maintainability in systems composed of many components (thinking of software) -- it is often much more important to have a simple interface than a simple implementation. Op-amps are a very good example of a device with a simple interface.

I agree, cuz in this case the transistor solution is cheaper but is more complex to understand and because of imperfections (less linearity for example) its not as good as an OpAmp solution. Anyway, understanding both solutions is a must to make a decission which tool is best for you - BJT or OOAMP. So far it looks like you do not fully understand the BJT solution and thats why you switch to an opamp solution. So your change of tools seems to be more for your better understanding and not because its the better solution.

Tou're quite right, hurz. I'm looking at BJT behaviour now.