查询词典 audio frequency

The design process is simple and can be simulated by the sophisticated SAW unit electrode and interdigital parameters.The parameters adjustment is very simple when filter center frequency and bandwidth changes.

设计过程简洁，可采用成熟的SAW单元电极和叉指参数进行计算机模拟，且当所设计的滤波器通带频率和带宽变化时，参数调整方便。

In lidar system basing on the brim detecting technology, it is crucial to determine the absorption spectral profiles of molecule absorption cell filter and the center frequency of emission laser signal in design of lidar system.

基于边缘探测技术的激光雷达系统中，确定分子吸收池滤波器的吸收光谱谱线，以及确定发射激光信号的中心频率，是实现激光雷达系统设计的核心问题。

The loss compensation is only activated at the filter's passband, and the insertion loss could be adjusted without affecting the filter's center frequency and 3-dB bandwidth.

共震器的损耗补偿只作用於主动滤波器的导通频段内，而且介入损失的调整并不影响到主动滤波器的中心频率与 3 dB频宽。

The design of a surface acoustic wave filter with a center frequency of 44?MHz, a 1?dB bandwidth of 8?MHz, an out-of-band rejection of more than 60?

采用数字傅里叶变换技术设计并制作了一个中心频率为44MHz，1dB带宽为8MHz，带外抑制大于60dB，插损小于28dB的带通滤波器。

The signal processing system consists of a band pass filter with center frequency of 2.856 GHz and bandwidth of 10 MHz,a logarithmic detector,a analog digital converting module...

本系统有效地采用了虚拟仪器的技术，具有模块化、开放性、易于交互、可扩展的特点，测试结果表明，其分辨率达到0.1 mm，符合设计要求。

In conventional ultrasound imaging system, the design of dynamic filter needs the center frequency of the near field and far field first, which were calculated using the linear sound field model. Then the frequencies are used to determine the factors of the dynamic filter for every section of the echo.

在传统超声成像的动态滤波器设计中，需首先按线性声场模型计算出近场及远场回波的中心频率，据此确定出动态滤波器在接收过程中各段的滤波器系数。

A compact and excellent band pass filter with 1.8 GHz center frequency and 250 MHz band pass was designed,which had one attenuation-pole on the high and low stop band respectively.The dimension of the filter was 2.0 mm×1.2 mm×0.9 mm,fitting for ...

实现了一个中心频率在1.8 GHz，带宽为250 MHz，且在高低禁带端各有一个衰减极点的优良小型化带通滤波器，其外形尺寸为2.0 mm×1.2 mm×0.9 mm，满足0805型号封装要求。

For a single filter, the center frequency is 39.5MHz, the 20dB shape factor is 2.8, and a bandwidth is 49 kHz,respectively.

除此之外，吾人另制作高频单一滤波器的中心频率值39.5 MHz，波形常数为2.8，频宽为49kHz。

Measured results indicate that the filter's center frequency was 6.02 GHz with a 3-dB bandwidth of 1.14 GHz and this filter was free from oscillations with either an 2.2-dB insertion loss or a 0.56-dB transmission gain.

共震器的损耗补偿只作用於主动滤波器的导通频段内，而且介入损失的调整并不影响到主动滤波器的中心频率与 3 dB频宽。

Filter the decision of the circuit only the low-frequency filter characteristics.

滤波器的电路结构仅决定了滤波器的低频特性。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。