Complete PCB Design Using OrCAD Capture and PCB Editor

Example 3. Multipage, Multipower, and Multiground Mixed A/D PCB Design With PSpice

Introduction

Multipage schematics can be used to organize and simplify large circuit designs and to incorporate PSpice simulations prior to laying out the board design. The mixed analog/digital circuit from the last example (see the schematic in Figure 9-90 ) is reused in this example but is modified to demonstrate how to route a single PCB from a multipage schematic project and add PSpice simulation capabilities. The example also demonstrates two methods used to establish isolated Ground planes using blind vias and a buried chassis shield. The technique allows quiet circuits to be placed on one side of the board and shielded from noisy digital circuits, which are ...