Amplifier

摘要

An amplifier comprising a field effect transistor, a terminating network comprising inductors connected in series separated by capacitors connected in parallel, a filter and a load, wherein the values of the capacitors and inductors are arranged to present open circuits to a predetermined number of odd harmonics of a signal frequency being amplified, and to present short circuits to a predetermined number of even harmonics of the signal frequency, wherein the normalised values of the inductors and capacitors of the terminating network are selected using the following procedure: Let g_r=C_r r odd=L_r r even then g₁=1, g₁g₂=(a); g_rg_r+1=(b), r=2->2m-1 and g_2mg_2m+1=(c) where (m-1) represents the predetermined number of odd harmonics which are presented with an open circuit $\begin{array}{cc}\frac{1}{m\left(2m-1\right)}& \left(a\right)\\ \frac{4}{\left(2m-1+r\right)\left(2m-r\right)}& \left(b\right)\\ \frac{1}{m}.& \left(c\right)\end{array}$