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编辑同志: 在现有的一些有关无线电技术基础和电子管放大器的书籍中,对于变压器耦合三极管单边功率放大器的最佳负载都给出了两个结果:R_a=R_i和R_a=2R_i,对于两者并不矛盾的解释是:前者是在输入信号振幅U_m和工作点u_(g0)(或I_(a0))固定的情况下求得的;而后者是在U_m可以随u_(g0)的选择而调整的情况下求得的。我们认为这些解释和有关的
Editor’s Commentary: In some of the existing books on radio technology fundamentals and tube amplifiers, two results are given for the optimal load of a transformer-coupled-transistor unilateral power amplifier: R_a = R_i and R_a = 2R_i for both It is not contradictory to explain that the former is obtained when input signal amplitude U_m and operating point u_ (g0) (or I_ (a0)) are fixed, while the latter is obtained when u_m can be selected with u_ (g0) Adjusted under the circumstances obtained. We think these explanations and related