| Summary: | 碩士 === 國立臺北科技大學 === 電腦與通訊研究所 === 98 === This thesis discusses and analyzes power integrity problem and signal integrity problem for complex system circuit working on two-layer print circuit board (PCB), and proposes the improvement method. Each kind of high efficiency product that in order to integrate heterogeneous circuits such as analog circuits, high-speed digital circuits and radio-frequency circuits to work on the identical PCB, the majority uses multi-layer PCB ( 4 layers or above ) which has ideal reference plane design, that can reduce the signals mutual electromagnetic field interference such as crosstalk, also can reduce the powers to be interfered by the signals such as simultaneous switching noise ( SSN ), and can decrease electromagnetic interference ( EMI ) from integral system circuit.
Nowadays are the times which compete with the cost. The consumers expect the products not only to be high performance and multi-functions but also to be inexpensive. Therefore the low cost system circuits that have high performance and multi-functions are designed by two-layer PCB, which already became major topic for products developing today. This thesis take integrated digital television (IDTV) as research subject platform, lets this system circuit stable operation successfully on two-layer PCB, and propose four kinds of major cases to discuss. 1. Impedance matching to interconnect differential pair for substrate and PCB layout. 2. HIS apply to TV tuner on two-layer PCB. 3. Signal integrity analyzes and improves for DDR SDRAM interface on two-layer PCB system. 4. Signal integrity analyzes and improves for non-ideal current return path on two-layer PCB system. Through these four kinds of case studies, not only proposes a design reference for hybrid circuits on two-layer PCB to industrial circles, but also proposes the direction of further study for academic circles.
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