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1·However, NEC has developed a new harmonically tuned amplifier which achieves 45% efficiency on otherwise standard components.

但是NEC已经开发出了一种新的谐波调谐放大器，可以从其它方面使这些标准设备的效能增强45%。

2·A kind of transducer with novel construction, the stagger-tuned wide-band transducer has been developed based on the principle of the stagger-tuned Amplifier.

我们应用电子技术中“参差调谐放大器”的原理，研制了一种结构新型的参差宽带换能器。

3·As the amplifier tuned load circuit, they are able to select the base component cosine pulse to obtain undistorted amplification signal output, so this amp is also known as tuned power amplifier.

由于放大器的负载为调谐回路，所以能选出余弦脉冲中的基准分量，获得不失真的放大信号输出，因此这种放大器也称为调谐功率放大器。

4·An efficient analysis method for the switching-mode tuned power amplifier is presented in this paper.

本文给出一种分析开关调谐功率放大器的有效方法。