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Sorry for the late reply. As you suggested the loop gain was low. I made the necessary modifications and the Circuit works fine. However the signal swing in the positive side is getting clipped and the negative swing is increased when I use a conventional DDA CMFB instead of the resistive...
As you suggested I varied the input dc voltage. For a common mode voltage of 900m and signal dc vaue of 0 at the input the outputs are same Vocm value..How ever as I increase the input signal dc value, complementary dc outputs are not the same value over or below the Vocm.
Yes that is a resistor. Can you elaborate on the " insufficient common mode balancer gain or bandwidth." Any references in addition to the elaboration will really help.
I designed an folded cascode FDA. However when designing a single ended to differential converter using the same FDA the output swings from the 2 output ports are not symmetrical. Any suggestions as what to do?
The feedback resistance is 50K and the input resistance is 25K
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