We describe a set of models that are used to manage the product and process design in a mass placement printed circuit board (PCB) assembly cell. Our models can be divided into two categories. First, we characterize the cell design problem and develop models to design an efficient assembly cell. Second, we present models for optimizing the different operational aspects of the assembly cell. The...

Printed Circuit Board layout involves the skillful placement of the required components in order to facilitate the routing process and minimize or satisfy size constraints. In this paper, we present the application to this problem of a general system, which is able to combine knowledge-based and search-based solving and which has a meta-level layer to control it's reasoning. Results have shown ...

The effect of Birth Order on Personality has remained a debated research topic with studies favouring and not favouring the possible impacts. While there has been substantial research separately on Birth Order and Psychological Well-Being (PWB) scarcely can we find studies relating Birth Orders with various sub-scales of PWB.The present study was thus conducted amongst students of Mysore (n=273...

Printed circuit board design complexity increases greatly as bus speeds exceed 100 MHz. This increased complexity is due more to the large number of simulations a designer must complete rather than simulation or modeling accuracy. This paper presents the case for these increased numbers of simulations, and presents techniques for managing this complexity.

This paper describes a simulation-based analysis of a printed circuit board (PCB) testing process. The PCBs are used in a defense application and the testing process is fairly complex. Boards are mounted on a test unit in batches and go through three thermal test cycles. As boards fail testing during the thermal cycling, operators can either replace the failed boards at fixed points during the ...

In recent years there has been much pressure placed on system designers to verify their designs with computer simulations before committing to actual printed circuit board layouts and hardware. Simulating complex digital designs is extremely beneficial, and very often, the prototype phase can be eliminated entirely. However, bypassing the prototype phase in high-speed/high-performance analog or...

Introduction As time-to-market pressures increase, design engineers continually look for ways to advance the development of system-level products and ensure problem-free manufacturing. Programmable logic devices (PLDs) that support in-system programmability (ISP) can help accelerate development time, simplify manufacturing flow, lower inventory costs, and improve printed circuit board (PCB) tes...

Power islands are often employed in printed circuit board (PCB) designs to alleviate the problem of power bus noise coupling between circuits. Good isolation can be obtained over a wide frequency band due to the large series impedance provided by the gap between the power islands. However, power bus resonances may degrade the isolation at high frequencies. The amount of isolation also depends o...

Printed circuit boards are steadily becoming faster, and as a result, relatively ordinary defects in connectors and sockets can now have more subtle and damaging effects. At the same time these defects defy detection by conventional technologies. This paper surveys existing tests for these defects and introduces a new solution based on Network Parameter Measurements.