查询词典 power amplifier

According to the demand of high magnetic field power supply, reference is increased with a set ramp rate and stops at a set stable value, so reference system is composed of digital setting and digit to analog converting circuit. But the stability of reference is mostly guaranteed by the performance of D/A circuit, so D/A circuit is particularly studied in reference system. The scheme of D/A circuit, the selection of DAC and its voltage reference, hardware anti-jamming design and PCB design are discussed in detail, and software of remote control and PLC are discussed in brief. Zero-flux DC current transformer well satisfies the demands of the high stability of Load current detection unit, so the principle of zero-flux DC current transformer is analyzed; in the mean time a project which detects the long term stability is designed. During 8 hours, analog signal which is detected with high precision digit multimeter is recorded in computer at 1HZ frequency by GPIB communication. The drift error source and related parameters are explained in the compare-amplify part. Detailed subtraction circuit is designed; also amplifier chip and periphery components are selected and verified according to the theory of error analysis.

根据强磁场电源的需求，参考源应按照软件设定的斜率逐渐上升到设定稳态值，则参考源系统应由数字给定和数模转换电路两大部分组成，而参考源的稳定度主要依靠完成数模转换功能的模拟电路的性能来保证，因此本文对参考源系统的研究以数模转换电路为重点，分别从电路方案的确定、数模转换芯片及其基准电压源的选取和验证、电路板硬件抗干扰和PCB设计几方面进行了论述，然后对数字给定部分的远控组态和PLC程序设计作了简要介绍；采用零磁通原理的直流电流转换器很好地满足了对负载电流检测单元高稳定度的需求，本文详细分析了零磁通检测的原理，并在选定此种类型电流转换器的基础上设计了一套检测长期稳定度的方案，8小时内以1秒为采样周期，通过计算机Labview程序和高精度数字电压表的GPIB通讯，将被高精度数字电压表数字化后的模拟信号采样值连续记录至计算机中；比较放大环节简要阐述了漂移产生的原因和相关参数指标，确定了具体的减法电路形式，并根据误差分析理论对运算放大器和外围元器件进行了选取和验证。

The receiver of course features Harman Kardon's high-current, ultrawide-bandwidth amplifier topology with discrete output devices to reproduce digital movie soundtracks and music with unmatched sonic accuracy and dynamic power.

接收器的功能，当然哈曼顿的高电流，超宽带放大器拓扑离散输出设备复制数字电影配乐及音乐声与无与伦比的精度和动态功耗。

The laser and optics properties of several kinds of laser glass have been discussed. A new method is pointed out to increase the output energy of power-limited laser that is high gain glass and low nonlinear refractive index coefficient n2 glass used in an amplifier together.

在分析几种激光基质材料的光谱和激光特性的基础上，提出了在功率受限型激光装置的主放大级中混合使用高增益激光玻璃和低非线性折射率n2玻璃的新思路，以期在降低n2的基础上提高激光装置的系统输出能力。

The monitoring unit may the real-time surveillance amplifier's electric current, the voltage and the power and demonstrated by the kneading board electric instrument.

监控单元可实时监视放大器的电流、电压和功率并由面板电表显示。

Reducing the stage of the distributed amplifier and using interstage matching network can reduce the dc power consumption and achieves flat gain.

并且利用减少分散式放大器之级数和级与级之间的匹配来达到平坦的增益和减少直流功率损耗。

Multibeam klystron a new type of high power microwave amplifier.

多注速调管一种新型大功率微波放大器。

The energy transmission and conversion in high power laser disk amplifier are discussed.

主要分析高功率激光驱动器中片状放大器的能量传输和转换问题。

The highly integrated CX2070X SoCs include an integrated audio/voice digital signal processor, multi-bit codec, digital and analog input/out interfaces, and a power efficient 2.5-watt per channel Class-D amplifier to drive stereo speakers or optional post-width modulation and differential line-out for external speaker systems amplifiers.

高度集成的 CX2070X SoC 内置了集成的音频/语音数字信号处理器、多位编解码器、数字和模拟输入/输出接口，以及每通道功效为 2.5 W 的、驱动立体扬声器的或可选的后宽度调制的 D 类放大器，还有用于外部扬声器系统放大器的差分线路输出。

ABSTRACT: This paper puts forward a multi-output-voltage's design on the basis of a magnetic amplifier, and we design a novel practical valued switching power according to the theory.

本文提出了一种基于磁放大器的多输出开关稳压电源设计方法，据此设计出了具有实用价值的新型开关电源。

These two alloys can be used at high frequencies up to 200 kHz for magnetic amplifier switching power supply with output of 12V, 9A.

用上述两种合金制做的频率达150～200kHz的高频磁放大器式开关电源，输出12V、9A，整机电源的效率达80％以上。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。