Class D audio amplifiers based on PWM technology are widely used, the PWM carrier is generated from an oscillator, so the performance of class D amplifier is affected by the oscillator. 基于PWM技术的D类音频功放已广泛应用于各类电子产品中,PWM载波由振荡器产生,振荡器的性能直接影响D类功放的性能。
The power of the modulated carrier wave is increased by the RF power amplifier. 射频功率放大器增加了调变载波的功率。调制器载(波)频(率)
Carrier channels synthesizing and power amplifier's linearization are realized in digital domain by digital multicarrier synthesizer and digital predistortor respectively. 采用数字多载波合成器和数字预失真器分别实现数字域上的载波信道合成和功放线性化。
How to cancel carrier and detect the intermodulation distortion signal of power amplifier will be discussed. 探讨如何进行射频载波抵消以及检测放大器互调失真信号。
Millimeter band GaAs carrier wave amplifier 毫米波段砷化镓载流子波放大器
Carrier consumption induced by amplified spontaneous emission, gain dispersion and internal loss in active region are all taken into account in numerical calculation which is based on section amplifier model and transfer matrix method. 在全面考虑放大自发辐射噪声及其消耗载流子、增益谱的色散性和有源区内部损耗等因素的基础上,运用放大器的分段模型,计算了不同条件下两种方式的输出噪声功率。
The influences of the injection current and carrier lifetime of semiconductor optical amplifier ( SOA) on the switching window of ultrafast nonlinear interferometer ( UNI) were studied by proceeding simulation and experiment. 对影响超快非线性干涉仪(UNI)开关窗口的半导体光放大器(SOA)的注入电流及载流子寿命进行了数值模拟实验研究。
In terms of the practical process of carrier recombinations in travelling wave semiconductor optical amplifier, the expression of saturation parameter has been revised 根据行波半导体光放大器中载流子复合的实际过程,对放大器饱和参量的表达式作了适当的修正
The paper describes that the processing method using constant carrier lifetime approximation in investigating the dynamic process of amplifying light pulse with semiconductor light amplifier is unreasonable. 阐明了在研究半导体光放大器对光脉冲放大这一动态过程中通常采用常数载流子寿命近似这一处理方法是不合理的。
Methods: The coronary blood flow and cardiac output were measured by electromagnetic flow meter. The internal pressure of left ventricle was determined by carrier amplifier and the blood oxygen content was determined by oximeter. 方法:用电磁流量计分别测量冠脉血流量及心输出量,用载波放大器测定左室内压,用血氧分析仪测量血氧含量。
Through considering the practical composite mechanism of carrier in amplifier, the time domain distribution of the pulse after the pulse data stream passing through the amplifier is simulated by a numerical method and is compared with the results obtained with constant carrier lifetime approximation. 通过考虑放大器中载流子的实际复合机制,数值模拟了脉冲数据流通过放大器后脉冲的时域分布,并与采用常数载流子寿命近似所得的结果进行了比较。
The principle of weak capacitance sensing is based on the charge integral amplifier and Lock-In amplifier. The practical circuit is composed of sine carrier wave generation, charge integral amplifier, AC amplifier, analog multiplier demodulator, and low pass filter. 微电容检测使用电荷积分和锁定放大器原理,具体电路包括载波发生电路、电荷积分放大器、交流放大、模拟乘法器解调电路以及低通滤波。
Theoretically, the higher the carrier frequency of PWM modulator of audio amplifier, the better the acoustical effect is. 理论上音频功率放大器的PWM调制器的载波频率越高,音质效果就越好。
And given the simulation of the radar signal processing programmes, analysis of the Doppler radar sensitivity and the ability to identify, discussed the carrier to select the number of PAPR impact and the microwave power amplifier front-end saturation of radar detection performance. 给出并仿真了该雷达的信号处理方案,分析了该雷达的多普勒敏感性和分辨能力,讨论了载波数的选取对峰均功率比的影响,以及微波前端饱和功率放大器对雷达检测性能的影响。