The filter takes the advantages of low cost , small in size , light in weight , etc . , and can easily be integrated into microwave and millimeter wave integrated circuits firstly , the ltcc technology was introduced and a test circuit based on the resonate method of microstrip ring was designed to test the performance of ltcc for dielectric constant and loss 这种滤波器具有体积小,便于集成的特点,也适用于表面贴装。先是对ltcc工艺及材料做了基本介绍,并采用微带环谐振法设计了一个ltcc工艺性能测试电路,对ltcc成品的介电常数、损耗和q值进行测试。
So here introduces a new method - the combination of boundary scan with deltascan , in which deltascan is applied to do short and open test in ict , so that the number of vectors used to test circuit short and open in boundary can be eliminated . all vector test , including boundary scan test , need to create test vectors 任何逻辑元件的矢量测试,包括边界扫描测试,都必须先生成测试矢量,然后用这些测试矢量作为输入端的激励信号,因此测试矢量是矢量测试的基础,测试矢量生成方法的难易程度和测试矢量数目是边界扫描技术能否在实际中应用的关键。
The reactive power compensation is an important engineering in the power system . the active reactive power compensator designed in this text takes the instantaneous reactive power theory of three - phase as foundation , and is formed by the reactive current testing circuit , current tracking control circuit and the main circuit , and among them the current tracking control circuit is formed by instruction current arithmetic circuit , current polarity checkout circuit and current tracking control logic circuit three parts in the circuit form 无功功率补偿是电力系统中的一项重要工程,本文所设计的有源无功功率补偿器是以三相瞬时无功功率理论为基础的,它由无功电流检测电路、电流跟踪控制电路和主电路三大部分组成,其中电流跟踪控制电路由指令电流运算电路、电流极性检测电路和电流跟踪控制逻辑电路三部分构成。