# 双调谐回路谐振放大器

1. $L_1=L_2=L$
2. $C_1+p_1^2 C_{oe}\approx C_2+p_2^2C_{ie}$
3. $p_1^2g_{oe}=p_2^2g_{ie}=g$
4. $\omega_1=\omega_2=\omega_0=\frac{1}{LC}$
5. $Q_{L1}=Q_{L2}\approx\frac{1}{g\omega_0L}=\frac{\omega_0C}{g}$

$A_v=\frac{p_1p_2\vert y_{fe}\vert}{g}\cdot\frac{\eta}{\sqrt{1(-\xi^2+\eta^2)^2+4\xi^2}}$

$\begin{cases} \eta<1 \quad A_{v0}=\frac{\eta}{1+\eta^2}\cdot \frac{p_1p_2\vert y_{fe}\vert}{g}\quad \xi=0\\ \eta=1 \quad A_{v0}=\frac{p_1p_2\vert y_{fe}\vert}{2g} \quad \xi=0\\ \eta>1 \quad A_{v0}=\frac{p_1p_2\vert y_{fe}\vert}{2g} \quad \xi=\pm\sqrt{\eta^2-1} \end{cases}$