DDS (direct digital synthesis) is a sort of frequency synthesis technique, which has advantages such as short frequency conversion time, high resolution in frequencies, programmability and so on.
直接数字频率合成(DDS)技术是目前广为应用的一项频率合成技术，它具有频率转换时间短、频率分辨率高、可编程等特点。
But when the sampling frequency of successive-approximation ADC is too high, the switched capacitor can't be charged properly. And this will result in too big conversion error.
但当逐次比较式adc的采样频率过高时，会使其内部采样保持的开关电容充电不充分，从而导致ADC转换误差过大。
Special requirement in high speed guide way inspection including inspection frequency up to 200~1000HZ, synchronization in 32 channels and 16 bits A/D conversion are considered in this paper.
轨道梁检测要求检测频率达到200~1000HZ，同时要求所有32路通道同步采集数据，并且要达到16位的A/D转换精度。
The 6kv transducer with the series-wound unit of the PWM pressure type can realize the output of the direct high pressure by collecting a lot of lower frequency conversion pressure.
单元串联多电平pwm电压源型6k V变频器采用若干个低压PW M变频功率单元串联的方式实现直接高压输出。
Direct Torque Control (DTC) of induction motor based on DSP is new technology of high performance AC — frequency conversion — rate of regulation.
基于DSP的电动汽车用交流电机的直接转矩控制是电机高性能交流变频调速的新技术之一。
Starting from a new aspect, it explained a new way to realize energy saving without retrofitting DCS and control logic at site in the application of high voltage frequency conversion.
从全新的角度，诠释了高压变频在系统应用中不对DCS和现场控制逻辑改造，即可实现节能应用的一种新方法。
A quadrature down-conversion mixer based on this topology is designed and optimized for an ultra high frequency RFID reader.
设计并优化了一个基于共用跨导级结构的用于超高频rfid阅读器的正交下变频混频器。
The all-digital ac frequency conversion control system based on the common DC bus can meet the requirements of high speed and high reliable control performance of the high-speed paper machine.
这种基于公共直流母线的全数字交流变频控制系统适用于高速纸机的高速度、高可靠性控制性能的需要。
A frequency guiding digital receiver is given. The key technology, fast frequency estimation and high effectual data rate conversion, is introduced briefly.
给出了一种频率引导式的数字接收机方案，简要介绍这种接收机的关键技术——快速、高精度频率估计以及高效的数据率转换。
This paper goes into the application of the GaAs Dual-Gate FET to the high frequency tuning-amplification and frequency conversion in a TV UHF channel selector and gives some experimental results.
本文讨论了砷化镓双栅场效应管在电视接收机UHF频道选择器中作高频调谐放大和变频应用时的一些考虑，并给出有关的实验结果。
The fast technology of frequency conversion is as high and new technology, foundation technology and save energy technology, and has permeated in all technology departments of economy domain.
变频调速技术作为高新技术、基础技术和节能技术，已经渗透到经济领域的所有技术部门中。
By comparing the characteristic of different technology, the influence on unit stable running by high voltage frequency conversion is summarized. Also the development tendency is predicted.
对不同形式的高压变频技术特点进行了比较，总结了高压变频装置对机组稳定运行的影响及高压变频技术的发展趋势。
High frequency soft-switching conversion is an important subject of power electronics and switching power supply.
软开关，高频化是电力电子学，也是开关电源的重要研究方向。
The paper presents the application of the technology of frequency conversion in the air-condition. It has the high efficiency, saving the energy, protection of the machine.
本文只论述变频技术在空调系统中的应用，它具有高效、节约能源、保护电机的优点。
It is proved that, frequency conversion has excellent accent speed, a brake capability, high efficiency rate, great credit rate factor and joint electricity effect and other merits.
实践证明，变频调速具有优异的调速和起制动性能，以及高功率因素和高效率的节电能力等优点，而被国内外公认为最有发展前途的调速方式。
Large power frequency conversion water cooling motor, low noise, high speed and good durability.
才用恒功率水冷变频主轴，转速快，噪音小，寿命长。
In this paper we introduce a method to design a high voltage power source that have the function of frequency conversion.
本文介绍了一种新型的高压调频电源的设计方法。
For RF PA, always require it can output a certain power within a range of frequency, at the same time meeting the system nonlinear requirements and have high conversion efficiency.
射频功率放大器总是要求在一定频率范围内输出一定的功率，同时满足系统的线性度和高效率要求。
Set of unit has convenient to move, a high degree of automation, iron recovery high characteristic, can be selected frequency conversion control realize stepless speed regulation.
整套机组具有移动方便、自动化程度高、铁回收率高的特点，可以选配变频控制实现无级调节。
These all can reach the ideal purpose. The line use imported electric components and its speeds are changed by frequency conversion with high accuracy.
该项饼干生产线全线采用进口电器元件，变频调速，节能可靠，单控，联控均有。
Famous frequency conversion controlling system is adopted. Satisfying the demand of high speed dewatering, saving electric power, and reducing noise.
采用名品变频控制系统，可满足高速甩干之需求，节省电力，降低噪音。
It is precisely because of the above reasons, this paper designs the non-contact charger based on high-frequency conversion technique.
正是由于以上的原因，本文设计出了基于高频逆变技术的无接触充电器。
Low, medium and high voltage, standard, Use in big screen color-TV, frequency conversion air conditioner audio circuits, ets.
低中高压，焊针式标准品，可用于大萤幕彩电、变频空调、音响等电子线路中。
AC frequency conversion synchronous film feeding and collecting device is adopted. The overhead large working table is provided to widen the visual field with high automation degree.
采用AC变频同放收膜装置，设有高架大平工作台，视野开阔，自动化程序高。
AC frequency conversion synchronous film feeding and collecting device is adopted. The overhead large working table is provided to widen the visual field with high automation degree.
采用AC变频同放收膜装置，设有高架大平工作台，视野开阔，自动化程序高。
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