Contour modulation is a technique in which a phase-modulated signal waveform and amplifier output impedance work together to maintain higher efficiency over a sizable output power back-off.
轮廓调制结合了一种相位调制信号的波形和放大器的输出阻抗，可在某个较大型输出电源关闭后保持更高的效率。
The basic principle of eddy current testing is introduced and the coil impedance responses due to the variations of the probe coil lift-off are analyzed and studied.
简要介绍了涡流检测的基本原理和涡流探头的特性；分析和研究了涡流检测探头提离变化对阻抗的影响；
For the arc resistance is nonlinear and high, the conventional feeder protections, such as impedance protection and current protection, maybe fail to trip off.
由于电弧电阻非线性、时变性、高阻的特点，使得常规原理馈线保护中的阻抗保护、电流速断保护往往不能正确动作。
High impedance measurements are performed on break off coupons designed with components geometries used to build the assembly.
针对断开后的几何元件试片，我们进行了高阻抗测量。
Existing wideband matching technologies have to frequently adjust circuit parameter to trade-off between impedance matching and noise matching. This makes the design complex.
现有的宽带匹配技术需要反复协调电路参数，在阻抗匹配和噪声匹配之间折衷，给设计增大了难度。
Existing wideband matching technologies have to frequently adjust circuit parameter to trade-off between impedance matching and noise matching. This makes the design complex.
现有的宽带匹配技术需要反复协调电路参数，在阻抗匹配和噪声匹配之间折衷，给设计增大了难度。
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