M new to this forum guyz. Plz help me in this cirrcuit that how actually this circuit(untitled.gif) works as a frequency selector. This circuit is my feedback for OP-AMP 5532 from output. Is it really a frequency selector feedback circuit?? Plz clear my doubts. Thanks in Advance.
Hello, i appreciate ur reply and i knw tht this is crap for almost evry1 out here. But m jst a startr in the field and nd some extra help from u experts. Could u giv a bit detailed explanation of how this circuit works as a frequwncy selective ciruit.
THANK U VERY MUCH
The amp has some biasing issues but the principle of the feedback is a variant of a twin-T notch filter. As the feedback goes through the attenuation notch of the network, the gain of the amp will increase due to reduction in amount of negative feed.
Because of the phase shifts in the feedback path you may to reduce the gain of amp's forward circuit to prevent oscillation.