查询词典 filter circuit

Our main products include: LFEF shaft fiberglass bag filter; FMPD sub-room-type pulse jet bag filter; MDC coal mill baghouse; LFMD series of vertical kiln baghouse; HMC single-pulse dust collector series; FD-, FVB type, CXBC type, YMW type, ZC-ó type rotary anti-hair bag filter; HD Series, UF series, BD series of stand-alone dust collector; MC-type BAG Pulse dust collector; NMB inverse baghouse airflow; PDC-ò type check beside the flat bag filter; CKC, XSSH series of electrostatic precipitators; CCJ / C filter impulse; various types of cyclone dust collector.

我公司生产的主要产品有：LFEF立窑玻纤袋除尘器；FMPD型分室脉冲喷吹袋式除尘器；MDC型煤磨袋式除尘器；LFMD系列立窑袋式除尘器；HMC单机脉冲系列除尘器；FD—、FVB型、CXBC型、YMW型、ZC—Ⅲ型回转反吹风袋式除尘器；HD系列、UF系列、BD系列单机除尘器；MC型袋式脉冲除尘器；NMB逆气流袋式除尘器；PDC—Ⅱ型旁查扁袋除尘器；CKC、XSSH系列静电除尘器；CCJ/C冲激式除尘器；各类旋风除尘器。

This invention discloses a duplexer and a multiplexer of the communication system and a method to realize them on a PCB circuit, which applies a 3db bridge and a low pass filter to constitute a hopstreet duplexer without waste band channels, in which, the signals are shunted and combined by the design of the circuit structure and power distribution of the 3-db bridge and phase offset function, the band filter of the low pass filter and the reflection function of a stopband to make up of a costless duplexer in theory to merge the two channels of different frequencies and reduce loss to increase volume and working bandwidth, then a multiplexer is formed by cascading multiple duplexers.

本发明涉及通信设备，公开了一种通信系统双工器和多工器以及双工多工方法，使得双工器和多工器能够在PCB电路上实现，并且体积小、损耗小、成本低、容量大。本发明中，采用三分贝电桥、低通滤波器构成无损耗频带信道合路的双工器，其中通过电路结构的设计并利用三分贝电桥的功率分配和相位偏移功能将各路信号进行分路和组合，利用低通滤波器的频带滤波和阻带反射功能联合三分贝电桥构造一个理论无耗的双工器，使两路不同频率的信道合路，降低的损耗、提高容量和工作带宽。通过多个上述双工器的级联构成多工器。

And the main circuit chart used microsoft office visio to draw up, has realized the filter circuit, the leveling circuit, the contravariant electric circuit's composition design.

其中主电路图使用了microsoft office visio来绘制，实现了滤波电路、整流电路、逆变电路的组成设计。关键字：单片机 V/F控制 HEF4752

First introduction whole wave commutate electric circuit ofwork principle, immediately after introduction the electriccapacity filter the function characteristics of an electriccircuit, and in the electric circuit adoption exaltation stability,exaltation temperature stability and limit flow a type over flowprotection electric circuit of concrete measure with insure anelectric circuit safety stability of work.

首先介绍了全波整流电路的工作原理，接着介绍了电容滤波电路的性能特点，然后引入了具有放大环节和辅助电源的串联可调式稳压电源，并在电路中采用了提高稳定度，提高温度稳定性及限流型过流保护电路的具体措施，以确保电路安全稳定的工作。

The paper discuss the main circuit and control circuit structure of the active power filter, according to the main circuit divided into two different kinds of structure that are four-phase convertor and three-phase convertor, this paper do deep research on each work theory and control circuit, provide each control method and DC side voltage control method.

论文讨论了在三相四线制系统中有源电力滤波器主电路及控制电路的构成，就主电路分别为四相变流器和三相变流器两种不同结构方式的工作原理和相应的控制电路进行了深入的研究，提出了各自的控制方法以及相应的直流侧电压控制方法。

It consists of circuitry that this constant current circuit stabilizes the criteria of a highly precise returned type constant current circuit of operation in another constant current circuit,Furthermore, the voltage amplification with very high stability is realized by adopting this constant current circuit also as the bias circuit of a first rank cascode and the 2nd step cascode, and the 2nd step constant current load intensity.

它由电路，这恒流电路稳定的标准，一个高度精确的返回式恒流电路的运行在另一恒流电路，此外，电压放大具有极高的稳定性，实现了通过这项恒流电路也作为偏见电路的第一级和第二栅栅一步，和第二步骤恒定电流负荷强度。

Circuit principles, analogue circuit, digit circuit which laid me a solid foundation of circuit for the study of communication; the study of electronic circuit of communication provided me with the working principles of analog communication system; the study on communication theory made me grasp the working methods of digital communication; the study on electromagnetic field, electromagnetic wave and aerial let me know that how signals travel through signal paths and how to apply signal and linear system, random signal and system to the research of noise's impact on signals

学习了电路原理、模拟电路、数字电路打下了学习通信的电路基础；学习了通信电子线路掌握了模拟通信系统的工作原理；学习了通信原理掌握了数字通信的工作方法；学习了电磁场与电磁波、微波与天线了解了信号如何在信道中传输；学习了信号与线性系统和随机信号与系统来研究噪声对信号的影响。

And due to the nature of the data acquisition, three data acquisition circuit board are adopted. They are voltage to digit data converting circuit board, current to digit data converting circuit board and digit data input/output circuit board. These circuit boards are used to acquire the main running parameter of the multifunctional experimentation equipment and to control the output of alarm message.The monitor and control program is developed on Delphi5.0 which is an excellent product of Borland Corp.

数据监控系统的硬件以一台工业控制PC机为核心，并根据采集信号的性质配置了电压-数字量转换板、电流-数字量转换板及开关量输入／输出板，对实验台的主要运行参数进行采集并进行报警控制；监控系统的软件以BORLAND公司的Delphi5.0作为开发平台，采用了面向对象的设计方法，运用了多线程、数据库等技术，做到了界面美观、操作方便。

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 Hall probe measurement circuit is mainly composed by the Hall probe, the non-idiostatic offset circuit, the signal amplification circuit, the automatic range conversion circuit and the A/D transducer circuit.

磁场测量装置主要由霍尔探头、不等位电势补偿电路、信号放大电路、量程自动切换电路、A/D转换器组成。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。