The elements for Printed Circuit Board (PCB) layout
In general, the basic process of the circuit board design can be divided into three steps.
(1). circuit diagram of the design: circuit diagram the design of the main is PROTEL099 schematic design system (Advanced Schematic) to draw a circuit diagram . In this process , to take full advantage PROTEL99 offer a variety of schematic drawing tools , a variety of editing functions , to achieve our purpose, that get a correct and fine circuit schematic.
( 2). generate network table : network the table is a circuit diagram design (SCH) and the printed circuit board design (PCB) between as a bridge , it is the board automatically the soul of . Netlist can be from the circuit schematics obtained , can also be from printed circuit boards extracted it.
(3). printed circuit board design : printed circuit boards the design of mainly for PROTEL99 Another important part of the PCB for the purposes of , in this process, we through PROTEL99 provide the power to achieve circuit board layout To complete the difficult and so on.
II. Draw a simple schematic
2.1 The schematic design process schematic design according to the following process to complete.
(1 ) the design drawings the size of Protel 99 / Schematic , the first idea of a good part drawings , design good drawings, size. drawings of Size is based on schematic the size and complexity of the , and set the appropriate paper size is design is good the schematic the first step in .
(2 ) Set Protel 99/Schematic design environment set Protel 99/Schematic design environment , including setting grid the size and type of , the cursor type , etc., most of the parameters can also use the system default values.
(3 ) rotating part of the user according to circuit the needs of , the part from the parts library remove onto the drawing , and place the of parts number , spare parts package to define and set and so on.