cut-off filter

Some Technical Problems on the Near IR Cut-off Filter Glass

近红外截止型有色光学玻璃的若干工艺问题

Short-wave-pass cut-off filter is an important part of the optical system occupies in the military , digital imaging and optical holographic .

短波通截止滤光片在军用，数码影像以及光学全息的光学系统中占有重要的一环，因此其市场应用前景可观。

Research on the Output Circuit of Klystron with Cut-off Waveguide Filter

速调管截止波导滤波器型输出回路研究

In front of every element , the cut-off waveguide filter is set in order to cancel out the inter-coupling and reject cross palarization .

阵元前放置截止式波导滤波器，用以消除互耦和抑制交叉极化。

Conclusion The cut-off frequency of filter can be adjusted easily by the design .

结论本设计能方便地控制滤波器的截止频率。

To avoid variance of technology and enviorment effects on cut-off frequency this filter used an on-chip tuning circuit based on PLL .

为了消除工艺偏差、温度变化、老化对截止频率的影响，滤波器电路使用了片上锁相环调谐电路。

Then , a low-pass filter is designed in the DCT transform domain . High frequency noise is eliminated through the dynamical cut-off frequency of filter .

然后在DCT变换域内设计一个低通滤波器，通过动态设计滤波器的截止频率消除高频噪声。

Under the filtration conditions of 10 ~ 30m / h , fibre-ball filter operates normally , the velocity of filtration effects greatly upon capacity of cut-off sludge by filter and operation period .

在滤速10～30m／h的条件下纤维球过滤器均能正常工作，滤速对过滤器截污容量和作业周期影响较大，过滤速度越高，过滤器截污容量越小，作业周期也越短；

Aim The cut-off frequency of programmable filter is controlled by the digital input of D / A converter though programming .

目的通过编程改变D/A转换器的数字输入量来控制滤波器的截止频率。

Method using the cut-off frequency of the filter detection signal processing , analysis of different degree of injury and the relationship between ultrasonic guided wave signal .

采用截止频率法对检测信号进行了滤波处理，分析了不同损伤程度与超声导波信号的关系。

The cut-off frequency of this filter can be controlled by dc biasing current , meanwhile , the low sensitivity characteristics of passive electrical network is also reserved .

截止频率可通过电流进行控制，同时保持了无源网络低灵敏度的特点。

The method of designing the programmable cut-off frequency low pass filter is also shown . Under the control of a computer , its cut-off frequency may vary with the input signal frequency .

介绍了一种程控低通滤波器的实现方法，其截止频率可随输入信号频率的变化由计算机控制。