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微驱动器的原理与应用 总被引:8,自引:0,他引:8
为了优化设计微驱动器,笔者通过对比近年来各种微驱动器的研究和发展,系统地概括总结了微驱动器所采用的主要的驱动原理、驱动方式和加工技术及其存在的优缺点等。并在此基础上,首次将微驱动器按功能进行了分类。 相似文献
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本文简要地介绍了高速数字隔离驱动器的工作原理以及在研制过程中遇到的关键技术问题及其解决方法。在前级隔离电路中选用了AD公司的ADUM1200数字隔离器,并采取保护措施及合理布局,消除了多通道之间的相互干扰;在后级功率驱动器中采用图腾柱电路提高了信号的响应速度。这些方法有效地提高了高速数字隔离驱动器的性能及可靠性,使其成功地应用于火炮控制驱动系统中。 相似文献
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介绍了一种基于力矩斩波控制的步进电机驱动电路和驱动方案,包括各种典型驱动电路的比较及改进方法,并由此提出了力矩控制驱动方案,详细说明了其原理,给出了硬件电路及软件设计流程。在实际应用中,改进后的驱动电路直接替代驱动器模块,且工作平稳、电路效率高、高频力矩大,提高了步进电机的高频性能,降低了硬件成本。 相似文献
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本文介绍了CONCEPT公司新一代高性能SCALE驱动器的特点、工作原理以及驱动电路设计,通过100kVA电力机车辅助变流器的系统实验证明该驱动电路稳定可靠,达到了设计要求。 相似文献
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AlejandroLara 《今日电子》2004,(5):i018-i022
大多数面板安装的继电器由微处理器或其他敏感的电子设备驱动。一个良好的线图驱动电路要求在继电器和微处理器电路之间进行隔离。有效的驱动电路必须考虑到驱动电流和驱动电压的要求,以及有效的抑制L di/dt的瞬态过程,谈瞬态会损坏微处理器电路。虽然现在很容易就可以设计一个复杂、有效的驱动电路,但是今天的设计必须突出成本效益。在继电器中装入单片的IC驱动器可以为系统设计师提供显著的价值。本文描述安森美半导体的集成式继电器驱动器产品的工作原理,它可以使敏感的电子设备和机械继电器连接,以获得不同的控制/功率功能。本文还介绍了该器件的一些优点,如节约印刷电路板面积和减少元件数量。 相似文献
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基于SOPC的TFT液晶显示屏驱动控制器 总被引:3,自引:3,他引:0
设计并实现了一种采用FPGA作为驱动器载体的通用可编程TFT-LCM,通过在FPGA器件中设置软核处理器(SOPC)连接上位机和液晶屏,利用SOPC接收上位机发送的液晶屏规格参数,并由SOPC中的自适应程序解算获得各输出引脚驱动时序和电平,实现对任意TFT液晶屏的驱动。通过应用实践表明,该通用可编程TFT-LCM避免了传统TFT-LCM只能适用于固定TFT液晶屏的缺点,可广泛应用在各种需要TFT显示屏的场合。 相似文献
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Byung Seong Bae Jae Won Choi Jae Hwan Oh Jang J. 《Electron Devices, IEEE Transactions on》2006,53(3):494-498
A drive circuit embedded with a level shifter was fabricated with conventional a-Si:H thin-film transistor (TFT) process. Two cascaded bootstrapped inverters were fabricated for the level shifter. The proposed level shifter shifts an input signal to a high voltage, for example, from 5 to 30 V. The level shifter embedded driver with a-Si:H TFT operates well for the input 5-V start pulse and clocks, and the 4th output of the driver shows 30.3-V output. The level shifter is stable under operation even though there is a threshold voltage shift of a-Si:H TFT. The stability of the driver was also investigated. 相似文献
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S3C2440A驱动RGB接口TFT LCD的研究 总被引:1,自引:1,他引:0
介绍了一款较典型的TFI型液晶屏的接口时序和逻辑要求,设计了嵌入式微处理器S3C2440A与该款带触摸屏功能的TFT LCD模组的接口电路,基于嵌入式Linux系统开发驱动程序,完成了RGB接口显示参数设置、图形界面显示调整及触摸屏控制等功能,实现了系统清晰、稳定的显示.实验表明,该方案通用性好,可以驱动不同分辨率的TFT LCD并提供显示与触摸控制功能;可移植性强,可以为各种嵌入式系统提供一个驱动TFT LCD的完整解决方案. 相似文献
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Polycrystalline silicon (poly-Si) thin film transistor (TFT) technology is very suitable for driving an active matrix LCD (AMLCD) panel as the driver circuit, and the panel can be integrated on the same substrate. This allows the entire display system to be thin and makes the concepts of ‘TV on wall’ and ‘sheet computer’ possible. However, the large variation of threshold voltage of poly-Si TFT across the wafer makes it difficult to obtain analogue amplifiers with constant gain and phase margin. In this paper, an analogue data driver for the poly-Si TFT AMLCD is proposed. An operational amplifier with a gate bias-voltage generation circuit for this analogue data driver, with characteristics independent of variations in threshold voltage, will be presented. In Hspice simulation, with threshold voltage varying from 2.5?V to 4.5?V, gain variations of the proposed amplifier were reduced from ±10?dB to ±0.2?dB and phase margin variations were reduced from 10° to 0.37° compared with typical operational amplifier design. This enables the analogue data driver for AMLCD to be implemented in poly-Si TFT technology. 相似文献
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A p-type low-temperature poly-Si thin film transistors (LTPS TFTs) integrated gate driver using 2 non-overlapped clocks is proposed. This gate driver features charge-sharing structure to turn off buffer TFT and suppresses voltage feed-through effects. It is analyzed that the conventional gate driver suffers from waveform distortions due to voltage uncertainty of internal nodes for the initial period. The proposed charge-sharing structure also helps to suppress the unexpected pulses during the initialization phases. The proposed gate driver shows a simple circuit, as only 6 TFTs and 1 capacitor are used for single-stage, and the buffer TFT is used for both pulling-down and pulling-up of output electrode. Feasibility of the proposed gate driver is proven through detailed analyses. Investigations show that voltage bootrapping can be maintained once the bootrapping capacitance is larger than 0.8 pF, and pulse of gate driver outputs can be reduced to 5 μs. The proposed gate driver can still function properly with positive VTH shift within 0.4 V and negative VTH shift within-1.2 V and it is robust and promising for high-resolution display. 相似文献
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An analogue buffer for driver-integrated poly-Si TFT LCDs is described where large mismatches of poly-Si TFT in threshold voltage and mobility are compensated. The buffer has a very simple configuration consisting of an nMOS, a pMOS, three switches, and a capacitor. Because of its simple and compact architecture, the panel size can be kept small even with integrated driver circuits. The measurement results show the analogue data buffer can achieve 4.5 bit resolution. 相似文献
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TFT AMLCD视频系统驱动电路 总被引:5,自引:5,他引:0
介绍了TFT AMLCD视频系统的构成和驱动方式,具体分析了有源矩阵液晶显示的模拟驱动电路,以及其中参数的选择和需要注意的问题。 相似文献