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The purpose of this paper is to present a novel trajectory prediction method for proximate time-optimal digital control DC-DC converters. The control method provides pre-estimations of the duty ratio in the next several switching cycles, so as to compensate the computational time delay of the control loop and increase the control loop bandwidth, thereby improving the response speed. The experiment results show that the fastest transient response time of the digital DC-DC with the proposed prediction is about 8/μs when the load current changes from 0.6 to 0.1A. 相似文献
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We present a novel gated operation active quenching circuit (AQC). In order to simulate the quenching circuit a complete SPICE model of a InGaAs SPAD is set up according to the I-V characteristic measurement resuits of the detector. The circuit integrated with a ROIC (readout integrated circuit) is fabricated in an CSMC 0.5 μm CMOS process and then hybrid packed with the detector. Chip measurement results show that the functionality of the circuit is correct and the performance is suitable for practical system applications. 相似文献
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在由通用RISC处理器核和附加定点硬件加速器构成的定点SoC(System-on-Chip)芯片体系架构基础上,提出了一种新颖的基于统计分析的定点硬件加速器字长设计方法。该方法利用统计参数在数学层面上求解计算出满足不同信噪比要求下的最小字长,能有效地降低芯片面积、功耗和制作成本,从而在没有DSP协处理器的低成本RISC处理器核SoC芯片上运行高计算复杂度应用。 相似文献
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基于高压VDM O S器件的物理机理和特殊结构,对非均匀掺杂沟道、漂移区非线性电阻及非线性寄生电容效应进行分析,用多维非线性方程组描述了器件特性与各参数之间的关系,建立了精确的高压六角型元胞VDM O S器件三维物理模型,并用数值方法求解。基于该物理模型提出的等效电路,在SP ICE中准确地模拟了高压VDM O S的特性,包括准饱和特性和瞬态特性。在全电压范围内(0~100 V),直流特性与测试结果、瞬态特性(频率≤5 MH z)与M ED IC I模拟结果相差均在5%以内,能够满足HV IC CAD设计的需要。 相似文献
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