\(|A_{V}^{{}^{\prime}}|=\frac{g_{m1}g_{m2}C_{\pi 2}}{R_{f}^{-1}+R_{L}^{-1}}\bullet\frac{g_{m2}^{2}{-\omega}^{2}C_{\pi 2}^{2}}{{{(g}_{m2}^{2}+\omega^{2}C_{\pi 2}^{2})}^{2}}\)