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enter image description here I am having some difficulty determining the constants $a, b, k$ in the open circuit voltage transfer function $T(s) = v_{0}/v_{i}(s)$, which is given by $T(s) = \dfrac{k [s + a]}{[s + b]}$

I know that the constants must be in terms of the elements $\{C_{1}, C_{2}, gm1, gm2, GL[=1/RL]\}$ positive. I also know that the $gm$ can be negative when switching the input terminal.

Any help is much appreciated.

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  • $\begingroup$ Is the first OTA meant to be hanging in the breeze with only two connections? $\endgroup$ – lmsavk Dec 5 '17 at 16:30
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The op amp in the left of the circuit don't do anything; The op amp in the right is connected like a comparator, with positive feedback. That means it's output will be VCC or GND depending on Vi, not intermediate values.

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