Protel Printed Circuit Boards is the first integrated design tool for integrated board-level design systems with the introduction of circuit-aided design systems. On the basis of the schematics that have been designed using Protel PCB, it is generally necessary to follow several steps such as determining shape, layout, routing, rules, and inspection. This paper analyzes the basic principles of layout and wiring.
Wiring rules for Protel Printed Circuit Boards components:
(1) Wiring should be short. In particular, the base of the triode, the high-frequency lead, and the lead with a large potential difference and adjacent to each other should be as short as possible and the spacing should be as large as possible.
(2) The common ground wire is generally placed at the edge to facilitate mounting the PCB to the chassis. The DC conductors of low-frequency circuits such as power supply, filtering, and control should also be placed on the edge. The edge should be kept at a certain distance, generally not less than 2mm.
(3) The wire should be round or obtuse. If the conditions permit, the wire can be properly widened and the spacing can be appropriately increased.
(4) The wiring is correct, the wiring is uniform, and the circuit is beautiful.