oh...thanks for the immediate reply.. by the way, i'm still curious about how to get the frequency in this circuit?? can you help me again?It is not a function generator. It is a poor sine-wave generator.
It needs another opamp as a buffer so that the third RC network is not loaded down by the 7.5k and 20k resistors of the inverting amplifiers.
It does not have an amplitude limiting circuit so its output will be clipped.
yup.. i have a difficulty in understanding those schematic so i prefer to study one by one...You seem to be on an endless quest for a function generator. This is about the 5th thread you've started for this (more?). Did the others we went over not work, or are you trying to understand oscillators?
There are chips that will do this, though they are a bit more complex in parts.
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by Luke James