# Small Signal OTA Circuit

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.

• Is the first OTA meant to be hanging in the breeze with only two connections? – lmsavk Dec 5 '17 at 16:30